DATASHEET AC'97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK FEATURES * * High Performance SD Technology * AC'97 Rev 2.3 Complaint DESCRIPTION * 20-bit Full Duplex Stereo ADC & DACs * Independent Sample Rates for ADC & DACs * 5-Wire AC-Link Protocol Compliance * 20-Bit SPDIF Output * Universal JacksTM * Full Stereo Microphone Pre-Amp * Internal Jack Sensing on Headphone & Line_Out * Internal Microphone Input Sensing * Digital PC Beep Option * Extended AC'97 2.3 Paging Registers * General Purpose I/Os and Crystal Elimination Circuit * Headphone Drive Capability (50 mW per channel) * Switchable Headphone Out (pins 39/41 or 35/36) * 0dB, 10dB, 20dB and 30dB Microphone Boost Capability * +3.3 V (STAC9753A) and +5 V (STAC9752A) Analog Power Supply Options * Pin Compatible with STAC9750/52/66 Analog LINE_OUT SNR: 94dB * Digital DAC SNR: 92dB * Digital ADC SNR: 85dB * Full-scale Total Harmonic Distortion: 0.002% * Crosstalk Between Input Channels: -70dB * Spurious Tone Rejection: 100dB * Stereo Microphone Input The AC'97 CODEC is designed to achieve a DAC SNR in excess of 94dB. The DACs, ADCs, and mixer are integrated with analog I/Os, which include four analog line-level stereo inputs, two analog line-level mono inputs, two stereo outputs, and one mono output channel. The STAC9752A/9753A includes digital input/output capability for support of modern PC systems, with an output that supports the SPDIF format. The STAC9752A/9753A is a standard 2-channel stereo CODEC. With TSI's headphone drive capability, headphones can be driven with without an external amplifier. The STAC9752A/9753A may be used as a secondary CODEC, with the STAC9700/21/56/08/84/50/52 as the primary, in a multiple CODEC configuration conforming to the AC'97 Rev. 2.3 specification. This configuration can provide the true six-channel, AC-3 playback required for DVD applications. The STAC9752A/9753A communicates via the five-wire AC-Link to any digital component of AC'97, providing flexibility in the audio system design. Packaged in an AC'97 compliant 48-pin TQFP, the STAC9752A/9753A can be placed on a motherboard, daughter boards, PCI, AMR, CNR, MDC or ACR cards. The STAC9752A/9753A provides variable sample rate Digital-to-Analog (DA) and Analog-to-Digital (AD) conversion, mixing, and analog processing. Supported audio sample rates include 48 KHz, 44.1 KHz, 32 KHz, 22.05 KHz, 16 KHz, 11.025 KHz, and 8 KHz; additional rates are supported in the STAC9752A/9753A soft audio drivers. All ADCs and DACs operate at 20-bit resolu- RELATED MATERIALS * Data Sheet TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Reference Designs TSI's STAC9752A/9753A are general purpose 20-bit, full duplex, audio CODECs conforming to the analog component specification of AC'97 (Audio CODEC 97 Component Specification Rev. 2.3). The STAC9752A/9753A incorporates TSI's proprietary SD technology. KEY SPECIFICATIONS * STAC9752A/9753A 1 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack TABLE OF CONTENTS PRODUCT BRIEF ......................................................................................................................... 6 Features ....................................................................................................................................................6 Description ................................................................................................................................................6 STAC9752A/9753A Block Diagram ..........................................................................................................8 Key Specifications ....................................................................................................................................8 Related Materials ......................................................................................................................................8 Additional Support ....................................................................................................................................9 CHARACTERISTICS AND SPECIFICATIONS ........................................................................... 10 Electrical Specifications ..........................................................................................................................10 Absolute Maximum Ratings .........................................................................................................10 Recommended Operation Conditions .........................................................................................10 Power Consumption ....................................................................................................................11 AC-Link Static Digital Specifications ............................................................................................11 STAC9752A Analog Performance Characteristics .......................................................................12 STAC9753A Analog Performance Characteristics .......................................................................13 AC Timing Characteristics ......................................................................................................................15 Cold Reset ...................................................................................................................................15 Warm Reset .................................................................................................................................15 Clocks ..........................................................................................................................................16 STAC9752A/9753A Crystal Elimination Circuit and Clock Frequencies ......................................16 Data Setup and Hold ...................................................................................................................17 Signal Rise and Fall Times ..........................................................................................................17 AC-Link Low Power Mode Timing ................................................................................................18 ATE Test Mode ............................................................................................................................18 TYPICAL CONNECTION AND POWER DIAGRAMS ................................................................. 20 STAC9752A/9753A Typical Connection Diagram for 48-pin LQFP ........................................................20 STAC9752A/9753A Typical Connection Diagram for 32-pad QFN ........................................................21 Split Independent Power Supply Operation ............................................................................................22 Split Independent Power Supply Operation for the 32-pad QFP Package .............................................23 CONTROLLER, CODEC, AND AC-LINK .................................................................................... 24 AC-Link Physical interface ......................................................................................................................24 Controller to Single CODEC ...................................................................................................................24 Controller to Multiple CODECs ...............................................................................................................25 Primary CODEC Addressing ........................................................................................................25 Secondary CODEC Addressing ...................................................................................................26 CODEC ID Strapping .....................................................................................................................6 Clocking for Multiple CODEC Implementations ......................................................................................26 STAC9752A/9753A as a Primary CODEC .............................................................................................26 STAC9752A/9753A as a Secondary CODEC ..............................................................................27 AC-Link Power Management ..................................................................................................................27 Powering down the AC-Link .........................................................................................................27 Waking up the AC-Link ................................................................................................................27 Controller Initiates Wake-up ..........................................................................................28 CODEC Initiates Wake-up .............................................................................................28 CODEC Reset ..............................................................................................................................28 Cold AC`97 Reset ..........................................................................................................28 Warm AC`97 Reset ........................................................................................................28 Register AC`97 Reset ....................................................................................................29 AC-LINK DIGITAL INTERFACE ................................................................................................. 30 Overview .................................................................................................................................................30 AC-Link Serial Interface Protocol ............................................................................................................31 AC-Link Variable Sample Rate Operation ...................................................................................31 Variable Sample Rate Signaling Protocol ....................................................................................31 SLOTREQ Behavior and Power Management ..............................................................32 Primary and Secondary CODEC Register Addressing ................................................................33 AC-Link Output Frame (SDATA_OUT) ...................................................................................................33 Slot 0: TAG / CODEC ID ..............................................................................................................35 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 2 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Slot 1: Command Address Port ...................................................................................................35 Slot 2: Command Data Port .........................................................................................................36 Slot 3: PCM Playback Left Channel .............................................................................................36 Slot 4: PCM Playback Right Channel ..........................................................................................36 Slot 5: NOT USED (Modem Line 1 Output Channel) ...................................................................36 Slot 6 -11: DAC ............................................................................................................................37 Slot 12: Audio GPIO Control Channel ..........................................................................................37 AC-Link Input Frame (SDATA_IN) ..........................................................................................................37 Slot 0: TAG ..................................................................................................................................38 Slot 1: Status Address Port / SLOTREQ Signaling Bits ...............................................................38 Status Address Port .......................................................................................................38 SLOTREQ signaling bits ................................................................................................38 Slot 2: Status Data Port ...............................................................................................................39 Slot 3: PCM Record Left Channel ................................................................................................39 Slot 4: PCM Record Right Channel .............................................................................................39 Slot 5: NOT USED (Modem Line 1 ADC) .....................................................................................39 Slot 6-9: ADC ...............................................................................................................................39 Slots 7-8: Vendor Reserved .........................................................................................................40 Slot 10 & 11: ADC ........................................................................................................................40 Slot 12: Reserved ........................................................................................................................40 AC-Link Interoperability Requirements and Recommendations .............................................................40 "Atomic slot" Treatment of Slot 1 Address and Slot 2 Data ..........................................................40 Slot Assignments for Audio .....................................................................................................................41 STAC9752A/9753A FUNCTIONAL BLOCKS ............................................................................ 43 STAC9752A/9753A Mixer Description ....................................................................................................43 Mixer Functional Diagrams .........................................................................................................44 Mixer Analog Input .......................................................................................................................44 Mixer Analog Output ....................................................................................................................44 SPDIF Digital Mux ..................................................................................................................................44 PC Beep Implementation ........................................................................................................................45 Analog PC Beep ..........................................................................................................................45 Digital PC Beep ............................................................................................................................45 PROGRAMMING REGISTERS ................................................................................................... 46 Register Descriptions ..............................................................................................................................47 Reset (00h) ..................................................................................................................................47 Master Volume Registers (02h) ...................................................................................................47 Headphone Volume Registers (04h) ............................................................................................48 Master Volume MONO (06h) .......................................................................................................49 PC BEEP Volume (0Ah) ..............................................................................................................49 Phone Volume (Index 0Ch) ..........................................................................................................50 Stereo or Mic Volume (Index 0Eh) ...............................................................................................50 LineIn Volume (Index 10h) ...........................................................................................................51 CD Volume (Index 12h) ...............................................................................................................52 Video Volume (Index 14h) ..........................................................................................................52 Aux Volume (Index 16h) ..............................................................................................................53 PCMOut Volume (Index 18h) .......................................................................................................53 Record Select (1Ah) .....................................................................................................................54 Record Gain (1Ch) .......................................................................................................................55 General Purpose (20h) ................................................................................................................55 3D Control (22h) ..........................................................................................................................56 Audio Interrupt and Paging (24h) .................................................................................................56 Powerdown Ctrl/Stat (26h) ...........................................................................................................57 Ready Status .................................................................................................................58 Powerdown Controls .....................................................................................................58 External Amplifier Power Down Control Output .............................................................58 Extended Audio ID (28h) ..............................................................................................................59 Extended Audio Control/Status (2Ah) ..........................................................................................60 Variable Rate Sampling Enable .....................................................................................61 SPDIF ............................................................................................................................61 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 3 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack SPCV (SPDIF Configuration Valid) ...............................................................................61 SPSA1, SPSA0 (SPDIF Slot Assignment) ....................................................................61 PCM DAC Rate Registers (2Ch and 32h) ....................................................................................62 PCM DAC Rate (2Ch) ..................................................................................................................62 PCM LR ADC Rate (32h) .............................................................................................................62 SPDIF Control (3Ah) ....................................................................................................................63 General Purpose Input & Outputs ...........................................................................................................63 EAPD ...........................................................................................................................................63 GPIO Pin Definitions ....................................................................................................................64 GPIO Pin Implementation ............................................................................................................64 Extended Modem Status and Control Register (3Eh) ..................................................................64 GPIO Pin Configuration Register (4Ch) .......................................................................................65 GPIO Pin Polarity/Type Register (4Eh) ........................................................................................65 GPIO Pin Sticky Register (50h) ...................................................................................................65 GPIO Pin Mask Register (52h) ....................................................................................................66 GPIO Pin Status Register (54h) ...................................................................................................66 Extended CODEC Registers Page Structure Definition ..........................................................................66 Extended Registers Page 00 .......................................................................................................67 Extended Registers Page 01 .......................................................................................................67 Extended Registers Page 02, 03 .................................................................................................67 STAC9752A/9753A Paging Registers ....................................................................................................67 CODEC Class/Rev (60h Page 01h) ...........................................................................................67 PCI SVID (62h Page 01h) ..........................................................................................................68 PCI SSID (64h Page 01h) ..........................................................................................................68 Function Select (66h Page 01h) ................................................................................................69 Function Information (68h Page 01h) ........................................................................................70 Digital Audio Control (6Ah, Page 00h) .........................................................................................72 Sense Details (6Ah Page 01h)................................................................................................... 72 Revision Code (6Ch) ....................................................................................................................74 Analog Special (6Eh) ...................................................................................................................74 Analog Current Adjust (72h) ........................................................................................................75 EAPD Access Register (74h) ....................................................................................................... 76 Register 78h Enable (76h) ...........................................................................................................77 Universal JacksTM Selection (78h) ...............................................................................................77 Vendor ID1 and ID2 (Index 7Ch and 7Eh) ..............................................................................................78 Vendor ID1 (7Ch) .........................................................................................................................78 Vendor ID2 (7Eh) .........................................................................................................................78 LOW POWER MODES ................................................................................................................ 79 MULTIPLE CODEC SUPPORT ................................................................................................... 81 Primary/Secondary CODEC Selection ....................................................................................................81 Primary CODEC Operation ..........................................................................................................81 Secondary CODEC Operation .....................................................................................................81 Secondary CODEC Register Access Definitions ....................................................................................81 TESTABILITY .............................................................................................................................. 83 ATE Test Mode .......................................................................................................................................83 STAC9752A/9753A PIN DESCRIPTION .................................................................................... 84 Pin Description for the 48-pin LQFP Package ........................................................................................84 Pinout List 48-pin LQFP Package ..........................................................................................................85 Pin Description for the 32-pad QFN Package .........................................................................................86 Pinout List 32-pad QFN Package ..........................................................................................................87 STAC9752A/9753A Digital I/O ................................................................................................................87 STAC9752A/9753A Analog I/O ..............................................................................................................88 STAC9752A/9753A Filter/References ....................................................................................................89 STAC9752A/9753A Power and Ground Signals .....................................................................................89 STAC9752A/9753A No Connects ...........................................................................................................89 ORDERING INFORMATION ....................................................................................................... 90 PACKAGE DRAWINGS AND PC BOARD LAYOUT INFORMATION ....................................... 91 48-Pin LQFP ...........................................................................................................................................91 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 4 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 32-Pad QFN ............................................................................................................................................92 PC Board Recommendations for 32-pad QFN Package 93 SOLDER REFLOW PROFILE ..................................................................................................... 94 Standard Reflow Profile Data .................................................................................................................94 Pb Free Process - Package Classification Reflow Temperatures .........................................................94 APPENDIX A: PROGRAMMING REGISTERS ........................................................................... 96 REVISION HISTORY ................................................................................................................... 98 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 5 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack LIST OF FIGURES STAC9752A/9753A Block Diagram ..............................................................................................................10 Cold Reset Timing .........................................................................................................................................17 Warm Reset Timing .......................................................................................................................................17 Clocks Timing ................................................................................................................................................18 Data Setup and Hold Timing ........................................................................................................................19 Signal Rise and Fall Times Timing ...............................................................................................................20 AC-Link Low Power Mode Timing ..................................................................................................................20 ATE Test Mode Timing ..................................................................................................................................20 STAC9752A/9753A Typical Connection Diagram 48-pin LQFP ...................................................................22 STAC9752A/9753A Typical Connection Diagram 32-pad QFN ...................................................................23 Split Connection Diagram 32-pad QFN .........................................................................................................25 AC-Link to its Companion Controller .............................................................................................................26 STAC9752A/9753A Powerdown Timing .......................................................................................................29 Bi-directional AC-Link Frame with Slot assignments .................................................................................... 32 AC-Link Audio Output Frame ........................................................................................................................35 Start of an Audio Output Frame ....................................................................................................................36 STAC9752A/9753A Audio Input Frame ........................................................................................................39 Start of an Audio Input Frame .......................................................................................................................39 Bi-directional AC-Link Frame with Slot assignments .....................................................................................43 AC-Link Input Slots Dedicated To CODEC ....................................................................................................44 STAC9752A/9753A 2-Channel Mixer Functional Diagram ...........................................................................46 Example of STAC9752A/9753A Powerdown/Powerup Flow ........................................................................81 Powerdown/Powerup Flow With Analog Still Alive .......................................................................................82 Pin Description Drawing ................................................................................................................................86 STAC9752A/9753A 32 pad QFN Pin Description Drawing ...........................................................................88 Package Drawing - 48-pin LQFP ...................................................................................................................93 Package Drawing - 32-pad QFN ....................................................................................................................94 Recommended PCB Layout for 32-pad QFN Package ..................................................................................95 Reflow Profile ................................................................................................................................................96 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 6 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack LIST OF TABLES Table 1. Clock mode configuration .................................................................................................................18 Table 2. Common Clocks and Sources ..........................................................................................................19 Table 3. Recommended CODEC ID strapping ..............................................................................................28 Table 4. AC-Link Output Slots (transmitted from the Controller) ....................................................................32 Table 5. The AC-Link Input Slots (transmitted from the CODEC) ..................................................................33 Table 6. VRA Behavior ..................................................................................................................................34 Table 7. Output Slot 0 Bit Definitions .............................................................................................................37 Table 8. Command Address Port Bit Assignments ........................................................................................38 Table 9. Status Address Port Bit Assignments ..............................................................................................40 Table 10. Status Data Port Bit Assignments ..................................................................................................41 Table 11. Primary CODEC Addressing: Slot 0 Tag Bits ................................................................................42 Table 12. Secondary CODEC Addressing: Slot 0 tag bits .............................................................................43 Table 13. AC-Link Output Slots Dedicated To CODEC .................................................................................43 Table 14. AC-Link Output Slots Dedicated To Audio .....................................................................................44 Table 15. AC-Link Input Slots Dedicated To Audio ........................................................................................44 Table 16. Audio Interrupt Slot Definitions .......................................................................................................44 Table 17. Digital PC Beep Examples .............................................................................................................47 Table 18. Programming Registers .................................................................................................................48 Table 19. Extended Audio ID Register Functions ..........................................................................................61 Table 20. AMAP compliant ............................................................................................................................63 Table 21. Hardware Supported Sample Rates ..............................................................................................64 Table 22. Supported Jack and Mic Sense Functions .....................................................................................72 Table 23. Reg 68h Default Values .................................................................................................................73 Table 24. Gain or Attenuation Examples .......................................................................................................73 Table 25. Register 68h/Page 01h Bit Overview .............................................................................................74 Table 26. Sensed Bits (Outputs) ....................................................................................................................75 Table 27. Sensed Bits (Inputs) .......................................................................................................................76 Table 28. Low Power Modes .........................................................................................................................81 Table 29. CODEC ID Selection ......................................................................................................................83 Table 30. Secondary CODEC Register Access Slot 0 Bit Definitions ............................................................84 Table 31. Test Mode Activation .....................................................................................................................85 Table 32. ATE Test Mode Operation .............................................................................................................85 Table 33. STAC9752A/9753A 48 Pin LQFP Pin List .....................................................................................87 Table 34. STAC9752A/9753A 32 Pad QFN Pin List ......................................................................................89 Table 35. STAC9752A/9753A Digital Connection Signals .............................................................................89 Table 36. STAC9752A/9753A Analog Connection Signals ............................................................................90 Table 37. STAC9752A/9753A Filtering and Voltage References ..................................................................91 Table 38. STAC9752A/9753A Power and Ground Signals ............................................................................91 Table 39. STAC9752A/9753A No Connects ..................................................................................................91 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 7 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 1. PRODUCT BRIEF 1.1. 1.2. Features * High performance SD technology * AC'97 Rev 2.3 Complaint, 20-bit, full duplex stereo ADCs & DACs * Independent sample rates for ADCs & DACs * 5-Wire AC-Link protocol compliance * 20-Bit SPDIF Output * Universal JacksTM * Full Stereo Microphone Pre-Amp * Internal Jack Sensing on Headphone & Line_Out * Internal Microphone Input Sensing * Digital PC Beep Option * Extended AC'97 2.3 Paging Registers * Digital-ready status * General purpose I/Os * Crystal Elimination Circuit * Headphone drive capability (50 mW per channel) * Switchable Headphone Out (pins 39/41 or 35/36) * 0, 10db, 20db, and 30 dB microphone boost capability * +3.3 V (STAC9753A) and +5 V (STAC9752A) analog power supply options * Pin compatible with STAC9700/21/56 * 100% compatible with STAC9750/52/66 * TSI Surround (SS3D) Stereo Enhancement * Energy saving dynamic power modes * Multi-CODEC option (Intel AC'97 rev 2.3) * 94dB SNR LINE-LINE Description TSI's STAC9752A/9753A are general purpose 20-bit, full duplex, audio CODECs conforming to the analog component specification of AC'97 (Audio Codec 97 Component Specification Rev. 2.3). The STAC9752A/9753A incorporates TSI's proprietary SD technology to achieve a DAC SNR in excess of 92dB. The DACs, ADCs and mixer are integrated with analog I/Os, which include four analog line-level stereo inputs, two analog line-level mono inputs, two stereo outputs, and one mono output channel. The STAC9752A/9753A include digital output capability for support of modern PC systems with an output that supports the SPDIF format. The STAC9752A/9753A are standard 2-channel stereo CODEC. With TSI's headphone drive capability, headphones can be driven without an external amplifier. The STAC9700/21/44/56/08/84/50/66 may be used as a secondary or tertiary CODEC, with the STAC9752A/9753A as the primary, in a multiple CODEC configuration conforming to the AC'97 Rev. 2.3 specification. This configuration can provide the true six-channel, AC-3 playback required for DVD applications. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 8 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack The STAC9752A/9753A communicates via the five wire AC-Link to any digital component of AC'97, providing flexibility in the audio system design. Packaged in an AC'97 compliant 48-pin LQFP or in the 32-pad/pin QFN, the STAC9752A/9753A can be placed on motherboards, daughter boards, PCI, AMR, CNR, MDC or ACR cards. The STAC9752A/9753A block diagram is illustrated in Figure 1. The STAC9752A/9753A provides variable sample rate Digital-to-Analog (DA) and Analog-to-Digital (AD) conversion, mixing, and analog processing. Supported audio sample rates include 48 KHz, 44.1 KHz, 32 KHz, 22.05 KHz, 16 KHz, 11.025 KHz, and 8 KHz; additional rates are supported in the STAC9752A/9753A soft audio drivers All ADC's and DAC's operate at 20-bit resolution. Two 20-Bit DACs convert the digital stereo PCM_OUT content to audio. The MIXER block combines the PCM_OUT with any analog sources to drive the LINE_OUT and HP_OUT outputs. The MONO_OUT delivers either mic only, or a mono mix of sources from the MIXER. The stereo, variable-sample-rate, 20-bit ADCs provide record capability for any mix of mono or stereo sources, and deliver a digital stereo PCM-in signal back to the AC-Link. The microphone input in mono mode and the mono mix input can be recorded simultaneously, thus allowing for an all digital output in support of the digital-ready initiative. For a digital-ready record path, the microphone is connected to the left channel ADC while the mono output of the stereo mixer is connected to right channel ADC. The STAC9752A/9753A includes full Stereo Microphone Pre-Amp support and can be used with the 10, 20 and 30dB Microphone Boost options. This integration allows for additional cost savings and options. The STAC9752A/9753A also includes TSI's Universal JacksTM functionality for jack interchangeability. The STAC9752A/9753A includes internal jack sensing using proprietary current- and impedance-sensing techniques. The impedance load on any of the inputs or outputs, including the Headphone and Line Outputs, can be detected. This enables jack sensing on the Headphone and Line_Out. The STAC9752A/9753A jack sense can detect the presence of devices on the Headphone and Line Outputs and on both Mic inputs. The STAC9752A/9753A implementation of jack sense uses the Extended Paging Registers defined by the AC'97 2.3 Specification. This allows for additional registry space to hold the identification information about the CODEC, the jack sensing details and results, and the external surroundings of the CODEC. The information within the Extended Paging Registers will allow for the automatic configuration of the audio subsystem without end-user intervention. For example, the BIOS can populate the Extended Paging Registers with valuable information for both the audio driver and the operating system such as gain and attenuation stages, input population and input phase. With this input information, the TSI driver will automatically provide to the Volume Control Panel only the volume sliders that are implemented in the system, thus improving the end-user's experience with the PC. The information in the Extended Paging Registers will also allow for automatic configuration of microphone inputs, the ability to switch between SPDIF and analog outputs, the routing of the master volume slider to the proper physical output, and SoftEQ configurations. The fully parametric TSI SoftEQ can be initiated upon jack insertion and sensed impedance levels. The STAC9752A/9753A also offers two styles of PC BEEP, Analog and Digital. The digital PC BEEP is a new feature added to the AC'97 Specification Rev 2.3. The STAC9752A/9753A is designed primarily to support stereo (2-speaker) audio. True AC-3 playback can be achieved for 6-speaker applications by taking advantage of the multi-CODEC option TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 9 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack available in the AC'97 architecture and supported by the STAC9752A/9753A. Additionally, the STAC9752A/9753A provides for a stereo enhancement feature, TSI Surround 3D (SS3D). SS3D provides the listener with several options for improved speaker separation beyond the normal 2- or 4-speaker arrangements. The STAC9752A/9753A can be SoundBlaster(R) and Windows Sound System(R) compatible when used with TSI's WDM driver for Windows 98/2K/ME/XP or with Intel/Microsoft driver included with Windows 2K/ME/XP. SoundBlaster is a registered trademark of Creative Labs. Windows is a registered trademark of Microsoft Corporation. 1.3. STAC9752A/9753A Block Diagram Figure 1. STAC9752A/9753A Block Diagram Video Registers 64x16 bits ADC MIXER ADC Mic Sensing Line In DAC Analog mixing and Gain Control Universal JacksTM Jack Sharing Internal Jack Sense Left or Right Channel Stereo or Mono Mic M U X Left or Right Channel Stereo or Mono Mic HP_OUT LINE_OUT MONO_OUT PCM in ADCs Variable Sample Rate 20-Bit DACs and 20-Bit ADCs 1.5. CD DAC Digital Interface CID0 CID1 1.4. AUX Multi-Codec Mic Boost 0,10, 20, or 30 dB PCM out DACs AC-link SYNC BIT_CLK SDATA_OUT SDATA_IN RESET# PHONE PC_BEEP Power Management M U X Digital PCBEEP Stereo Mono SPDIF Output Key Specifications * Analog LINE_OUT SNR: 94 dB * Digital DAC SNR: 92 dB * Digital ADC SNR: 85 dB * Full-scale Total Harmonic Distortion: 0.002% * Crosstalk between Input Channels: -70 dB * Spurious Tone Rejection: 100 dB * Stereo Microphone Input Related Materials * Product Brief * Reference Designs for MB, AMR, CNR, and ACR applications * Audio Precision Performance Plots TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 10 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 1.6. Additional Support Additional product and company information can be obtained by going to the TSI web site at: www.TSI.com TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 11 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 2. CHARACTERISTICS AND SPECIFICATIONS 2.1. Electrical Specifications 2.1.1. Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the STAC9752A/9753A. These ratings, which are standard values for TSI commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the recommended operating temperature range. Item Pin Maximum Rating Analog maximum supply voltage AVdd 6 Volts Digital maximum supply voltage DVdd 5.5 Volts VREFOUT output current 5 mA Voltage on any pin relative to ground Vss - 0.3 V to Vdd + 0.3 V Operating temperature 0oC to +70oC Storage temperature -55 oC to +125 oC Soldering temperature 260 oC for 10 seconds * Soldering temperature information for all available packages begins on page 96. 2.1.2. Recommended Operation Conditions Parameter Power Supply Voltage Min. Typ. Max. Units Digital - 3.3 V 3.135 3.3 3.465 V Analog - 5 V 4.75 5 5.25 V Analog - 3.3 V 3.135 3.3 3.465 V +70 C +90 C Ambient Operating Temperature Case Temperature 0 Tcase (48-LQFP) ESD: The STAC9752A/9753A is an ESD (electrostatic discharge) sensitive device. The human body and test equipment can accumulate and discharge electrostatic charges up to 4000 Volts without detection. Even though the STAC9752A/9753A implements internal ESD protection circuitry, proper ESD precautions should be followed to avoid damaging the functionality or performance. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 12 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 2.1.3. Power Consumption Parameter Min Typ Max Unit - 35 - mA + 5 V Analog - 80 - mA + 3.3 V Analog - 70 - mA PR0 Supply Current - TBD - mA PR1 Supply Current - TBD - mA PR2 Supply Current - TBD - mA PR3 Supply Current - TBD - mA PR4 Supply Current - TBD - mA PR5 Supply Current - TBD - mA PR6 Supply Current - TBD - mA Digital Supply Current + 3.3 V Digital Analog Supply Current Power Down Status 2.1.4. AC-Link Static Digital Specifications (Tambient = 25 C, DVdd = 3.3 V 5%, AVss = DVss = 0 V; 50 pF external load) Parameter Symbol Min Typ Max Unit Input Voltage Range Vin -0.30 - DVdd + 0.30 V Low level input range Vil - - 0.35 x DVdd V High level input voltage Vih 0.65 x DVdd - - V High level output voltage Voh 0.90 x DVdd - - V Low level output voltage Vol - - 0.1 x DVdd V Input Leakage Current (AC-Link inputs) - -10 - 10 A Output Leakage Current (Hi-Z AC-Link outputs) - -10 - 10 A Output buffer drive current - - 4 - mA TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 13 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 2.1.5. STAC9752A Analog Performance Characteristics (Tambient = 25 C, AVdd = 5.0 V 5%, DVdd = 3.3 V 5%, AVss = DVss = 0 V; 1 KHz input sine wave; Sample Frequency = 48 KHz; 0dB = 1 Vrms, 10 KW / 50 pF load, Testbench Characterization BW: 20 Hz - 20 KHz, 0dB settings on all gain stages) Parameter Min Typ Max Unit - 1.0 0.03 - Vrms Vrms - - - 1.0 1.0 1.0 50 - Vrms Vrms Vrms mW 20 94 94 92 85 - 20,000 dB dB dB dB Hz 84 74 20 19,200 28,800 100 55 70 - 95 95 84 80 - 19,200 28,800 1 0.5 0.5 dB dB dB dB dB Hz Hz Hz dB dB ms dB dB dB dB K pF V dB dB Full Scale Input Voltage: All Analog Inputs except Mic Mic Inputs (Note 1) Full Scale Output: Line Output PCM (DAC) to LINE_OUT MONO_OUT HEADPHONE_OUT (32 load) (peak) Analog S/N: (Note 2) CD to LINE_OUT Other to LINE_OUT D/A to LINE_OUT LINE_IN to A/D with High pass filter enabled Analog Frequency Response (Note 3) Total Harmonic Distortion: (Note 4) CD to LINE_OUT Other to LINE_OUT D/A to LINE_OUT (full scale) LINE_IN to A/D with High pass filter enabled HEADPHONE_OUT A/D & D/A Digital Filter Pass Band (Note 5) A/D & D/A Digital Filter Transition Band A/D & D/A Digital Filter Stop Band A/D & D/A Digital Filter Stop Band Rejection (Note 6) DAC Out-of-Band Rejection (Note 7) Group Delay (48 KHz sample rate) Any Analog Input to LINE_OUT Crosstalk (10 KHz Signal Frequency) Any Analog Input to LINE_OUT Crosstalk (1 KHz Signal Frequency) Spurious Tone Rejection Attenuation, Gain Step Size Input Impedance (Note 8) Input Capacitance VREFout Interchannel Gain Mismatch ADC Interchannel Gain Mismatch DAC Note: 1. 2. 3. 4. 5. 6. 7. 8. 100 100 1.5 50 15 0.5 x AVdd - With +30 dB Boost on, 1.0 Vrms with Boost off Ratio of Full Scale signal to idle channel noise output is measured "A weighted" over a 20 Hz to a 20 KHz bandwidth. (AES17-1991 Idle Channel Noise or EIAJ CP-307 Signal-to-noise Ratio). 1dB limits for Line Output & 0dB gain Ratio of Full Scale signal to THD+N output with -3dB signal, measured "A weighted" over a 20 KHz BW, 48 KHz Sample Frequency 0.25dB limits Stop Band rejection determines filter requirements. Out-of-Band rejection determines audible noise. The integrated Out-of-Band noise generated by the DAC process, during normal PCM audio playback, over a bandwidth 28.8 to 100 KHz, with respect to a 1 Vrms DAC output. For all inputs except PC BEEP. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 14 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 2.1.6. STAC9753A Analog Performance Characteristics (Tambient = 25 C, AVdd = 5.0 V 5%, DVdd = 3.3 V 5%, AVss = DVss = 0 V; 1 KHz input sine wave; Sample Frequency = 48 KHz; 0dB = 1 Vrms, 10 KW / 50 pF load, Testbench Characterization BW: 20 Hz - 20 KHz, 0dB settings on all gain stages) Parameter Min Typ Max Unit All Analog Inputs except Mic - 1.0 - Vrms Mic Inputs (Note 1) - 0.03 - Vrms - 0.5 - Vrms Full Scale Input Voltage: Full Scale Output: Line Output PCM (DAC) to LINE_OUT 0.5 Vrms MONO_OUT - 0.5 - Vrms HEADPHONE_OUT (32 load) (peak) - 12.5 - mW CD to LINE_OUT - 93 - dB Other to LINE_OUT - 93 - dB D/A to LINE_OUT - 91 - dB LINE_IN to A/D with High pass filter enabled - 85 - dB 20 - 20,000 Hz CD to LINE_OUT - 93 - dB Other to LINE_OUT - 93 - dB D/A to LINE_OUT (full scale) - 84 - dB LINE_IN to A/D with High pass filter enabled - 84 - dB 74 80 - dB 20 - 19,200 Hz A/D & D/A Digital Filter Transition Band 19,200 - 28,800 Hz A/D & D/A Digital Filter Stop Band 28,800 - - Hz A/D & D/A Digital Filter Stop Band Rejection (Note 6) 100 - - dB DAC Out-of-Band Rejection (Note 7) 55 - - dB - - 1 ms Any Analog Input to LINE_OUT Crosstalk (10 KHz Signal Frequency) 70 - - dB Any Analog Input to LINE_OUT Crosstalk (1 KHz Signal Frequency) - 100 - dB Spurious Tone Rejection - 100 - dB Attenuation, Gain Step Size - 1.5 - dB Input Impedance (Note 8) - 50 - K Input Capacitance - 15 - pF VREFout - 0.5 x AVdd - V Interchannel Gain Mismatch ADC - - 0.5 dB Interchannel Gain Mismatch DAC - - 0.5 dB Gain Drift - 100 - ppm/C Analog S/N: (Note 2) Analog Frequency Response (Note 3) Total Harmonic Distortion: (Note 4) HEADPHONE_OUT A/D & D/A Digital Filter Pass Band (Note 5) Group Delay (48 KHz sample rate) TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 15 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Note: 1. 2. 3. 4. 5. 6. 7. 8. With +30 dB Boost on, 1.0Vrms with Boost off Ratio of Full Scale signal to idle channel noise output is measured "A weighted" over a 20 Hz to a 20 KHz bandwidth. (AES17-1991 Idle Channel Noise or EIAJ CP-307 Signal-to-noise Ratio).0 dB gain, 20 KHz BW, 48 KHz Sample Frequency 1 dB limits 1dB limits for Line Output & 0 dB gain Ratio of Full Scale signal to THD+N output with -3dB signal, measured "A weighted" over a,20 KHz BW, 48 KHz Sample Frequency 0.25dB limits Stop Band rejection determines filter requirements. Out-of-Band rejection determines audible noise. The integrated Out-of-Band noise generated by the DAC process, during normal PCM audio playback, over a bandwidth 28.8 to 100 KHz, with respect to a 1 Vrms DAC output. For all inputs except PC BEEP. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 16 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 2.2. AC Timing Characteristics (Tambient = 25 C, AVdd = 3.3 V or 5 V 5%, DVdd = 3.3 V 5%, AVss = DVss = 0 V; 75 pF external load for BIT_CLK and 60 pF external load for SDATA_IN) 2.2.1. Cold Reset Figure 2. Cold Reset Timing Trst2clk Tres_low RESET# Ttri2actv BIT_CLK Ttri2actv SDATA_IN Parameter Symbol Min Typ Max Units RESET# active low pulse width Tres_low 1.0 - - s RESET# inactive to SDATA_IN or BIT_CLK active delay Tri2actv - - 25 ns RESET# inactive to BIT_CLK startup delay Trst2clk .01628 - 400 s BIT_CLK active to RESET# asserted (Not shown in diagram) Tclk2rst 0.416 - - s Note: BIT_CLK and SDATA_IN are in a high impedance state during reset. 2.2.2. Warm Reset Figure 3. Warm Reset Timing Tsync_high Tsync_2clk SYNC BIT_CLK Parameter SYNC active high pulse width SYNC inactive to BIT_CLK startup delay TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 17 Symbol Min Typ Max Units Tsync_high 1.0 1.3 - s Tsync2clk 162.8 - - ns V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 2.2.3. Clocks Figure 4. Clocks Timing T clk_low B IT _C LK T clk_high T clk_period T sync_low T sync_high SYNC T sync_period Parameter Symbol BIT_CLK frequency BIT_CLK period Tclk_period BIT_CLK output jitter Min Typ Max Units - 12.288 - MHz - 81.4 - ns - 750 - ps BLT_CLK high pulse width (Note 1) Tclk_high 36 40.7 45 ns BIT_CLK low pulse width (Note 1) Tclk_low 36 40.7 45 ns - 48.0 - KHz Tsync_period - 20.8 - s SYNC high pulse width Tsync_high - 1.3 - s SYNC low pulse width Tsync_low - 19.5 - s SYNC frequency SYNC period Note: 2.2.4. 1. Worst case duty cycle restricted to 45/55. STAC9752A/9753A Crystal Elimination Circuit and Clock Frequencies The STAC9752A/9753A supports several clock frequency inputs as described in the following table. In general, when a 24.576 MHz crystal is not used, the XTALOUT pin should be tied to ground. This short to ground configures the part into an alternate clock mode and enables an on board PLL. CODEC Modes: P = The STAC9752A/9753A as a Primary CODEC S = The STAC9752A/9753A as a Secondary CODEC. Table 1. Clock mode configuration XTL_OUT Pin Config CID1 Pin Config CID0 pin config Clock Source Input CODEC Mode CODEC ID XTAL float float 24.576 MHz xtal P 0 XTAL or open float pulldown 12.288 MHz bit clk S 1 XTAL or open pulldown float 12.288 MHz bit clk S 2 XTAL or open pulldown pulldown 12.288 MHz bit clk S 3 short to ground float float 14.31818 MHz source P 0 short to ground float pulldown 27 MHz source P 0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 18 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Table 1. Clock mode configuration XTL_OUT Pin Config CID1 Pin Config CID0 pin config Clock Source Input CODEC Mode CODEC ID short to ground pulldown float 48 MHz source P 0 short to ground pulldown pulldown 24.576 MHz source P 0 Table 2. Common Clocks and Sources 2.2.5. Clock Source Clock Frequency XTAL 24.576 MHz BIT_CLK 12.288 MHz VGA 14.31818 MHz Digital Video 27 MHz USB 48 MHz Data Setup and Hold (50pF external load) Figure 5. Data Setup and Hold Timing tco B IT _ C L K T s etup V ih V il SDATA_O UT S D A T A _ IN SYNC V oh V ol T hold Parameter Symbol Min Typ Max Units Setup to falling edge of BIT_CLK Tsetup 10 - - ns Hold from falling edge of BIT_CLK Thold 10 - - ns tco - - 15 ns Output Valid Data from rising edge of BIT_CLK Note: 2.2.6. Setup and hold time parameters for SDATA_IN are with respect to the AC'97 controller. Signal Rise and Fall Times (BIT_CLK: 75pF external load; from 10% to 90% of Vdd) (SDATA_IN: 60pF external load; from 10% to 90% of Vdd) TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 19 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Figure 6. Signal Rise and Fall Times Timing B IT _C LK T riseclk T fallclk T risedin T falldin S D A T A _IN Parameter Symbol Min Typ Max Units BIT_CLK rise time Triseclk - - 6 ns BIT_CLK fall time Tfallclk - - 6 ns SDATA_IN rise time Trisedin - - 6 ns SDATA_IN fall time Tfalldin - - 6 ns 2.2.7. AC-Link Low Power Mode Timing Figure 7. AC-Link Low Power Mode Timing SYNC Slot 1 Slot 2 W rite to 0x20 Data PR4 BIT_CLK SDATA_O UT Don't care Ts2_pdown SDATA_IN Note: BIT_CLK not to scale Parameter End of Slot 2 to BIT_CLK, SDATA_IN low 2.2.8. Symbol Min Typ Max Units Ts2_pdown - - 1.0 s Typ Max Units ATE Test Mode Figure 8. ATE Test Mode Timing RESET# SDATA_OUT Tsetup2rst Hi-Z SDATA_IN, BIT_CLK Toff Parameter TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Symbol 20 Min V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Setup to trailing edge of RESET# (also applies to SYNC) Rising edge of RESET# to Hi-Z delay Note: 1. 2. 3. Tsetup2rst 15.0 - - ns Toff - - 25.0 ns All AC-Link signals are normally low through the trailing edge of RESET#. Bringing SDATA_OUT high for the trailing edge of RESET# causes the STAC9752A/9753A AC-Link outputs to go high impedance, which is suitable for ATE in-circuit testing. Once the test mode has been entered, the STAC9752A/9753A must be issued another RESET# with all AC-Link signals low to return to the normal operating mode. # denotes active low. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 21 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 3. TYPICAL CONNECTION AND POWER DIAGRAMS 3.1. STAC9752A/9753A Typical Connection Diagram for 48-pin LQFP Figure 9. STAC9752A/9753A Typical Connection Diagram 48-pin LQFP *O P TIO NAL 2 * F errite Bead 3.3V 5% 0.1 F 1 F 0.1 F 25 AVdd1 0.1 F 1 F 38 1 AVdd2 D Vdd1 0.1 F (N ear C lk source) C LO C K_IN * 9 D Vdd2 XTL_IN O PTIO N AL 2 24.576 M H z 12 PC _BEEP XTL_O U T 3 13 PH O N E SD AT A_O U T 14 AU X_L BIT_C LK AU X_R SD AT A_IN 15 SYN C 16 VID EO _L R ESET # 17 VID EO _R C ID 0 18 C ID 1 C D _L 19 S TAC 9753 C D _G N D 20 C D _R EAPD VR EFO U T VR EF 21 M IC 1 NC 22 M IC 2 NC 23 NC LIN E_IN _L SPD IF 24 LIN E_IN _R G PIO 1 32 1 F * C AP2 G PIO 0 0.1 F LIN E_O U T _L *O PTIO NA L LIN E_O U T _R 820 pF 29 820 pF 30 *A dd resistiv e div ider when using 5V clock. 27 pF AFILT 1 M O N O _O U T H P_O U T _L AFILT 2 H P_C O M M AVss1 26 AVss2 42 D Vss1 4 D Vss2 7 H P_O U T _R 27 pF 0 5 EM I F ilter 22 6 8 27 pF 10 T U N E T O LAYO U T 11 45 46 47 28 27 1 F 31 33 34 48 44 43 35 36 37 39 40 H P_C O M M should be tied to ground at the headphone pin. 41 *T erminate ground plane as close to codec as possible Analog G round D igital G round NOTE: PIN 48: TO DISABLE SPDIF, USE AN 1 KW - 10 KW EXTERNAL PULLUP RESISTOR. Note: The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about 2.5V. The name of the pin in the AC'97 specification is CD_GND, and this has confused many designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to ground will change the internal bias of the entire CODEC, and cause significant distortion. If there is no analog CD input, then this pin can be No-Connect. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 22 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 3.2. STAC9752A/9753A Typical Connection Diagram for 32-pad QFN Figure 10. STAC9752A/9753A Typical Connection Diagram 32-pad QFN *OPTIONAL 2 * Ferrite Bead 3.3V 5% 10 F 1 2 EMI Filter 22 27 pF TUNE TO LAYOUT 3 5 7 8 LINK PINS 22 1 F* 0.1 F 1 F 26 9 AVdd2 DVdd2 0.1 F XTL_IN GPIO SDATA_OUT EAPD/GPIO BIT_CLK SPDIF_OUT SDATA_IN 30 31 32 SPDIF and GPIO PINS SYNC STAC9753A (3.3V Analog) RESET# VREFOUT 18 VREF CAP2 19 1 F in 32-pad QFN 0.1 F *OPTIONAL VREF PINS 820 pF 20 820 pF 21 AFILT1 14 MIC2 AFILT2 15 LINE_IN_L FILTER PINS 9 10 STANDARD ANALOG I/O 13 MIC1 LINE_IN_R PHONE 23 LINE_OUT_L CD_L 11 CD_GND 12 CD_R HP_OUT_L MONO_OUT AVss1 HP_OUT_R 25 LINE_OUT_R AVss2 17 29 DVss1 4 DVss2 7 16 24 27 UNIVERSAL JACKSTM PINS 28 *Terminate ground plane as close to codec as possible Analog Ground Digital Ground NOTE: PIN 48: TO DISABLE SPDIF, USE AN 1 KW - 10 KW EXTERNAL PULLUP RESISTOR. Note: The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about 2.5V. The name of the pin in the AC'97 specification is CD_GND, and this has confused many designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to ground will change the internal bias of the entire CODEC, and cause bad distortion. If there is no analog CD input, then this pin can be No-Connect. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 23 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 3.3. Split Independent Power Supply Operation In PC applications, one power supply input to the STAC9752A/9753A may be derived from a supply regulator and the other directly from the PCI power supply bus. When power is applied to the PC, the regulated supply input to the IC will be applied some time delay after the PCI power supply. Without proper on-chip partitioning of the analog and digital circuitry, some manufacturer's CODECs would be subject to on-chip SCR type latch-up. TSI's STAC9752A/9753A specifically allows power-up sequencing delays between the analog (AVddx) and digital (VDddx) supply pins. These two power supplies can power-up independently and at different rates with no adverse effects to the CODEC. The IC is designed with independent analog and digital circuitry that prevents on-chip SCR type latch-up. However, the STAC9752A/9753A is not designed to operate for extended periods with only the analog supply active. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 24 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 3.4. Split Independent Power Supply Operation for the 32-pad QFP Package Figure 11. Split Connection Diagram 32-pad QFN 3.3V or 5V 5% 3.3V 5% 10 F 1 2 EMI Filter 22 3 0.1 F 10 F 26 9 AVdd2 DVdd2 0.1 F XTL_IN GPIO EAPD/GPI0 BIT_CLK SPDIF_OUT 27 pF TUNE TO LAYOUT 5 7 8 LINK PINS 22 1 F* SDATA_IN STAC9752A (5V Analog) or STAC9753A (3.3V Analog) SYNC RESET# CAP2 0.1 F 820 pF 20 19 VREFOUT 18 VREF 1 F VREF PINS 13 14 MIC2 15 LINE_IN_L 9 11 12 25 32 SPDIF and GPIO PINS MIC1 AFILT2 10 STANDARD ANALOG I/O AFILT1 21 FILTER PINS 31 in 32-pad QFN *OPTIONAL 820 pF 30 SDATA_OUT PHONE 16 LINE_IN_R CD_L 23 LINE_OUT_L CD_GND 24 LINE_OUT_R CD_R 27 HP_OUT_L MONO_OUT AVss1 AVss2 17 29 DVss1 4 DVss2 7 HP_OUT_R *Terminate ground plane as close to codec as possible Analog Ground TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 25 UNIVERSAL JACKSTM PINS 28 Digital Ground V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 4. CONTROLLER, CODEC, AND AC-LINK This section describes the physical and high-level functional aspects of the AC`97 Controller to CODEC interface, referred to as the AC-Link. 4.1. AC-Link Physical interface The STAC9752A/9753A communicates with its companion Digital Controller via the AC-Link digital serial interface. AC-Link has been defined to support connections between a single Controller and up to four CODECs. All digital audio, modem and handset data streams, as well as all control (command/status) information are communicated over this serial interconnect, which consists of a clock (BIT_CLK), frame synchronization (SYNC), serial data in (SDATA_IN), serial data out (SDATA_OUT), and a reset (RESET#). 4.2. Controller to Single CODEC The simplest and most common AC`97 system configuration is a point-to-point AC-Link connection between Controller and the STAC9752A/9753A, as illustrated in Figure 12. Figure 12. AC-Link to its Companion Controller S YN C XTA L_IN B IT _C LK D igital D C '97 C ontroller S D A T A _O U T A C '97 C odec S D A T A _IN RESET# XTA L_O U T A primary CODEC may act as either a source or a consumer of the BIT_CLK, depending on the configuration. While RESET# is asserted, if a clock is present at the BIT_CLK pin for at least five cycles before RESET# is de-asserted, then the CODEC is a consumer of BIT_CLK, and must not drive BIT_CLK when RESET# is de-asserted. The clock is being provided by other than the primary CODEC, for instance by the controller or an independent clock chip. In this case the primary CODEC must act as a consumer of the BIT_CLK signal as if it were a secondary CODEC. This clock source detection must be done each time the RESET# line is asserted. In the case of a warm reset, where the clock is halted but RESET# is not asserted, the CODEC must remember the clock source, and not begin generating the clock on the assertion of SYNC if the CODEC had previously determined that it was a consumer of BIT_CLK. The STAC9752A/9753A uses the XTAL_OUT pin (Pin 3) and the CID0 and CID1 pins (Pins 45 & 46) to determine its alternate clock frequencies. See section 2.2.4: page 18 for additional information on Crystal Elimination and for supported clock frequencies. If, when the RESET# signal has been de-asserted, the CODEC has not detected a signal on BIT_CLK as defined in the previous paragraph then the AC`97 CODEC derives its clock internally from an externally attached 24.576 MHz crystal or oscillator, or optionally from an external 14.318 MHz oscillator, and drives a buffered 12.288 MHz clock to its digital Controller over AC-Link under the signal name "BIT_CLK". Clock jitter at the DACs and ADCs is a fundamental impediment to high quality output, and the internally generated clock will provide AC`97 components with a clean TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 26 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack clock that is independent of the physical proximity of AC`97's Digital Controller (henceforth referred to as "the Controller"). If BIT_CLK begins toggling while the RESET# signal is still asserted, the clock is being provided by other than the primary CODEC, for instance by the controller or by a discrete clock source. In this case, the primary CODEC must act as a consumer of the BIT_CLK signal as if it were a secondary CODEC. The beginning of all audio sample packets, or Audio Frames, transferred over AC-Link is synchronized to the rising edge of the SYNC signal. SYNC is driven by the Controller. The Controller generates SYNC by dividing BIT_CLK by 256 and applying some conditioning to tailor its duty cycle. This yields a 48 KHz SYNC signal whose period defines an audio frame. Data is transitioned on AC-Link on every rising edge of BIT_CLK, and subsequently sampled by the receiving device on the receiving side of AC-Link on each immediately following falling edge of BIT_CLK. 4.3. Controller to Multiple CODECs Several vendor specific methods of supporting multiple CODEC configurations on AC-Link have been implemented or proposed, including CODECs with selective AC-Link pass-through and controllers with duplicate AC-Links. Potential implementations include: * 6-channel audio using 3 x 2-channel CODECs * Separate CODECs for independent audio and modem AFE * Docking stations, where one CODEC is in the laptop and another is in the dock This specification defines support for up to four CODECs on the AC-Link. By definition there can be one Primary CODEC (ID 00) and up to three Secondary CODECs (IDs 01,10, and 11). The CODEC ID functions as a chip select. Secondary devices therefore have completely orthogonal register sets; each is individually accessible and they do not share registers. Multiple CODEC AC-Link implementations must run off a common BIT_CLK. They can potentially save Controller pins by sharing SYNC, SDATA_OUT, and RESET# from the AC`97 Digital Controller. Each device requires its own SDATA_IN pin back to the Controller. This prevents contention of multiple devices on one serial input line. Support for multiple CODEC operation necessitates a specially designed Controller. An AC`97 Digital Controller that supports multiple CODEC configurations implements multiple SDATA_IN inputs, supporting one Primary CODEC and up to three Secondary CODECs. 4.3.1. Primary CODEC Addressing Primary AC`97 CODECs respond to register read and write commands directed to CODEC ID 00 (see Section 4 for details of the Primary and Secondary CODEC addressing protocols). Primary devices must be configurable (by hardwiring, strap pin(s), or other methods) as CODEC ID 00, and reflect this in the two-bit CODEC ID field(s) of the Extended Audio and/or Extended Modem ID Register(s). The Primary CODEC may either drive the BIT_CLK signal or consume a signal provided by the Digital Controller or other clock generator. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 27 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 4.3.2. Secondary CODEC Addressing Secondary AC`97 CODECs respond to register read and write commands directed to CODEC IDs 01, 10, or 11. Secondary devices must be configurable (via hardwiring, strap pin(s), or other methods) as CODEC IDs 01, 10, or 11 in the two-bit field(s) of the Extended Audio and/or Extended Modem ID Register(s). CODECs configured as Secondary must power up with the BIT_CLK pin configured as an input. Using the provided BIT_CLK signal is necessary to ensure that everything on the AC-Link is synchronous. BIT_CLK is the clock source (multiplied by 2 so that the internal rate is 24.576 MHz). 4.3.3. CODEC ID Strapping Audio CODECs in the 48-pin package use pins 45 and 46 (defined as ID0# and ID1#) as strapping (i.e. configuration) pins to configure the CODEC ID. The ID0# and ID1# strapping bits adopt inverted polarity and default to 00 = Primary (via a weak internal pullup) when left floating. This eliminates the need for external resistors for CODECs configured as Primary, and maintains backward compatibility with existing layouts that treat pins 45 and 46 as "no connect" or a capacitor connected to ground. Pulldowns are typically 0-10 KW and connected to Digital (not Analog) Ground. Table 3. Recommended CODEC ID strapping 4.4. CID1 (pin 46) CID0 (pin 45) Configuration NC NC Primary ID 00 NC pulldown Secondary ID 01 pulldown NC Secondary ID 10 pulldown pulldown Secondary ID 11 Clocking for Multiple CODEC Implementations To keep the system synchronous, all Primary and Secondary CODEC clocking must be derived from the same clock source, so they are operating on the same time base. In addition, all AC-Link protocol timing must be based on the BIT_CLK signal, to ensure that everything on the AC-Link will be synchronous. The following are potential 24.576 MHz clock options available to a Secondary CODEC: * Using an external 24.576 MHz signal source (external oscillator or AC`97 Digital Controller) * Using the Primary's crystal out * Using the Primary's BIT_CLK output to derive 24.576 MHz See section 2.2.4: page 18 for clock frequencies supported and configurations. 4.5. STAC9752A/9753A as a Primary CODEC Primary devices are required to support correctly either of the following clocking options: * 24.576 MHz crystal attached to XTAL_IN and XTAL_OUT * 24.576 MHz external oscillator provided to XTAL_IN * 12.288 MHz oscillator provided to the BIT_CLK input The Primary device may also optionally support the following clocking option: * 14.318 MHz external oscillator provided to XTAL_IN TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 28 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack See section 2.2.4: page 18 for clock frequencies supported and configurations. 4.5.1. STAC9752A/9753A as a Secondary CODEC Secondary devices are required to function correctly using one or more of the following clocking options: * 24.576 MHz external oscillator provided to XTAL_IN (synchronous and in phase with Primary 24.576 MHz clock) * BIT_CLK input provided by the Primary. In this mode, a clock at XTAL_IN (Pin 2) is ignored. See section 2.2.4: page 18 for clock frequencies supported and configurations. 4.6. AC-Link Power Management 4.6.1. Powering down the AC-Link The AC-Link signals can be placed in a low power mode. When AC`97's Powerdown Register (26h) is programmed to the appropriate value, both BIT_CLK and SDATA_IN are brought to and held at a logic low voltage level. After signaling a reset to AC`97, the AC`97 Controller should not attempt to play or capture audio data until it has sampled a CODEC Ready indication from AC`97. Figure 13. STAC9752A/9753A Powerdown Timing SYNC B IT _ C L K SD AT A_O U T s lo t 2 per fra m e TAG S D A T A _ IN s lo t 2 per fra m e TAG W rite to 0 x2 0 D A TA PR4 N o te : B IT _ C L K n o t to s c a le BIT_CLK and SDATA_IN are transitioned low immediately following decode of the write to the Powerdown Register (26h) with PR4. When the AC`97 Controller driver is at the point where it is ready to program the AC-Link into its low power mode, slots 1 and 2 are assumed to be the only valid stream in the audio output frame. After programming the AC`97 device to this low power, halted mode, the AC`97 Controller is required to drive and keep SYNC and SDATA_OUT low. Once the AC`97 CODEC has been instructed to halt BIT_CLK, a special "wake-up" protocol must be used to bring the AC-Link to the active mode since normal audio output and input frames can not be communicated in the absence of BIT_CLK. 4.6.2. Waking up the AC-Link There are two methods for bringing the AC-Link out of a low power, halted mode. Regardless of the method, it is the AC`97 Controller that performs the wake-up task. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 29 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 4.6.2.1. Controller Initiates Wake-up AC-Link protocol provides for a "Cold AC`97 Reset", and a "Warm AC`97 Reset". The current powerdown state would ultimately dictate which form of AC`97 reset is appropriate. Unless a "cold" or "register" reset (a write to the Reset Register) is performed, wherein the AC`97 registers are initialized to their default values, registers are required to keep state during all powerdown modes. Once powered down, re-activation of the AC-Link via re-assertion of the SYNC signal must not occur for a minimum of four audio frame times following the frame in which the powerdown was triggered. When AC-Link powers up the CODEC indicates readiness via the CODEC Ready bit (input slot 0, bit 15). 4.6.2.2. CODEC Initiates Wake-up The STAC9752A/9753A (running off Vaux) can trigger a wake event (PME#) by transitioning SDATA_IN from low to high and holding it high until either a warm or cold reset is observed on the AC-Link. This functionality is typically implemented in modem CODECs that detect ring, Caller ID, etc. Note that when the AC-Link is either programmed to the low power mode or shut off completely, BIT_CLK may stop if the primary CODEC is supplying the clock, which shuts down the AC-Link clock to the Secondary CODEC1. In order for a Secondary CODEC to react to an external event (phone ringing), it must support an independent clocking scheme for any PME# associated logic that must be kept alive when the AC-Link is down. This includes logic to asynchronously drive SDATA_IN to a logic high-level, which signals a wake request to the AC`97 Digital Controller. 4.6.3. CODEC Reset There are three types of AC`97 reset: * a cold reset where all AC`97 logic (most registers included) is initialized to its default state * a warm reset where the contents of the AC`97 register set are left unaltered * a register reset which only initializes the AC`97 registers to their default states 4.6.3.1. Cold AC`97 Reset A cold reset is achieved by asserting RESET# low for the minimum specified time, then subsequently de-asserting RESET# high. BIT_CLK and SDATA_IN will be activated, or re-activated as the case may be, and all AC`97 control registers will be initialized to their default power on reset values. RESET# is an asynchronous AC`97 input. 4.6.3.2. Warm AC`97 Reset A warm AC`97 reset will re-activate the AC-Link without altering the current AC`97 register values. A warm reset is signaled by driving SYNC high for a minimum of 1 ms in the absence of BIT_CLK. Within normal audio frames SYNC is a synchronous AC`97 input. However, in the absence of BIT_CLK, SYNC is treated as an asynchronous input used in the generation of a warm reset to AC`97. 1. Secondary CODEC always configures its BIT_CLK pin as an input. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 30 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack AC`97 MUST NOT respond with the activation of BIT_CLK until SYNC has been sampled low again by AC`97. This will preclude the false detection of a new audio frame. 4.6.3.3. Register AC`97 Reset Most registers in an AC97 device can be restored to their default values by performing a write (any value) to the Reset Register, 00h. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 31 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 5. AC-LINK DIGITAL INTERFACE 5.1. Overview AC-Link is the 5-pin digital serial interface that links AC`97 CODEC to the Controller. The AC-Link protocol is a bi-directional, fixed clock rate, serial digital stream. AC-Link handles multiple input and output PCM audio streams, as well as control register accesses employing a time division multiplexed (TDM) scheme that divides each audio frame into 12 outgoing and 12 incoming data streams, each with 20-bit sample resolution. The STAC9752A/9753A DACs, ADCs, and SPDIF can be assigned to slots 3&4, 6&9, 7&8 or 10&11. Figure 14. Bi-directional AC-Link Frame with Slot assignments SLOTS 0 1 2 3 4 5 6 7 8 9 10 11 12 TAG CMD ADDR CMD DATA PCM LEFT PCM RT NA PCM CTR PCM LSURR PCM RSURR PCM LFE SPDIF SPDIF IO CTRL TAG STATUS ADDR STATUS DATA PCM LEFT PCM RT LINE1 ADC PCM MIC Vendor RSVD Vendor RSVD Vendor RSVD LINE2 ADC HSET ADC IO STATUS SYNC OUTGOING STREAMS (Controller output - SDATA_OUT) INCOMING STREAMS (codec output - SDATA_IN) TAG PHASE DATA PHASE Slot 12 can be used by the AC'97 Codec if a Modem Codec is not present. Table 4. AC-Link Output Slots (transmitted from the Controller) Slot Name Description 0 SDATA_OUT TAG MSBs indicate which slots contain valid data; LSBs convey CODEC ID 1 Control CMD ADDR write port Read/write command bit plus 7-bit CODEC register address 2 Control DATA write port 3, 4 PCM L&R DAC playback 20-bit PCM data for Left and Right channels 5 Modem Line 1 DAC 16-bit modem data for modem Line 1 output 16-bit command register write data 6, 7, 8, 9 PCM Center, Surround L&R, LFE 20-bit PCM data for Center, Surround L&R, LFE channels 10 Modem Line 2 DAC 11 Modem handset DAC 12 Modem IO control 12 CODEC IRQ 10-11 SPDIF Out 10-12 Double Rate Audio TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 16-bit modem data for modem Line 2 output 16-bit modem data for modem Handset output GPIO write port for modem Control Can be used by CODEC if a modem CODEC is not present. Optional AC-Link bandwidth for SPDIF output Optional AC-Link bandwidth for 88.2 or 96 KHz on L, C, R channels 32 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Table 5. The AC-Link Input Slots (transmitted from the CODEC) 5.2. Slot Name 0 SDATA_IN TAG 1 STATUS ADDR read port 2 STATUS DATA read port 3, 4 PCM L&R ADC record Description MSBs indicate which slots contain valid data MSBs echo register address; LSBs indicate which slots request data 16-bit command register read data 20-bit PCM data from Left and Right inputs 5 Modem Line 1 ADC 16-bit modem data from modem Line1 input 6-11 PCM ADC Record 20-bit PCM data - Alternative Slots for Input 12 GPIO Status GPIO read port and interrupt status AC-Link Serial Interface Protocol The AC`97 Controller signals synchronization of all AC-Link data transactions. The AC`97 CODEC, Controller, or external clock source drives the serial bit clock onto AC-Link, which the AC`97 Controller then qualifies with a synchronization signal to construct audio frames. SYNC, fixed at 48 KHz, is derived by dividing down the serial bit clock (BIT_CLK). BIT_CLK, fixed at 12.288 MHz, provides the necessary clocking granularity to support twelve 20-bit outgoing and incoming time slots. AC-Link serial data is transitioned on each rising edge of BIT_CLK. The receiver of AC-Link data (CODEC for outgoing data and Controller for incoming data) samples each serial bit on the falling edges of BIT_CLK. The AC-Link protocol provides for a special 16-bit time slot (Slot 0) wherein each bit conveys a valid tag for its corresponding time slot within the current audio frame. A 1 in a given bit position of slot 0 indicates that the corresponding time slot within the current audio frame has been assigned to a data stream, and contains valid data. If a slot is tagged invalid, it is the responsibility of the source of the data, (AC`97 CODEC for the input stream, AC`97 Controller for the output stream), to stuff all bit positions with 0s during that slot's active time. SYNC remains high for a total duration of 16 BIT_CLKs at the beginning of each audio frame. The portion of the audio frame where SYNC is high is defined as the "Tag Phase". The remainder of the audio frame where SYNC is low is defined as the "Data Phase". Additionally, for power savings, all clock, sync, and data signals can be halted. This requires that an AC`97 CODEC be implemented as a static design to allow its register contents to remain intact when entering a power savings mode. 5.2.1. AC-Link Variable Sample Rate Operation The AC-Link serial interconnect defines a digital data and control pipe between the Controller and the CODEC. The AC-Link supports twelve 20-bit slots at 48 KHz on SDATA_IN and SDATA_OUT. The time division multiplexed (TDM) "slot-based" architecture supports a per-slot valid tag infrastructure that the source of each slot's data sets or clears to indicate the validity of the slot data within the current audio frame. This tag infrastructure can be used to support transfers between Controller and CODEC at any sample rate. 5.2.2. Variable Sample Rate Signaling Protocol AC-Link's tag infrastructure imposes FIFO requirements on both sides of the AC-Link. For example, in passing a 44.1 KHz stream across the AC-Link, for every 480 audio output frames that are sent across, 441 of them must contain valid sample data. Does the AC`97 Digital Controller pass all 441 PCM samples followed by 39 invalid slots? Or does the AC`97 Digital Controller evenly interleave TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 33 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack valid and non-valid slots? Each possible method brings with it different FIFO requirements. To achieve interoperability between AC`97 Digital Controllers and CODECs designed by different manufacturers, it is necessary to standardize the scheme for at least one side of the AC-Link so that the FIFO requirements will be common to all designs. The CODEC side of the AC-Link is the focus of this standardization. The new standard approach calls for the addition of "on demand" slot request flags. These flags are passed from the CODEC to the AC`97 Digital Controller during every audio input frame. Each time the AC`97 Digital Controller sees one or more of the newly-defined slot request flags set active (low) in a given audio input frame, it knows that it must pass along the next PCM sample for the corresponding slot(s) in the AC-Link output frame that immediately follows. The VRA (Variable Rate Audio) bit in the Extended Audio Status and Control Register must be set to 1 to enable variable sample rate audio operation. Setting the VRA = 1 has two functions: 1. Enables PCM DAC/ADC conversions at variable sample rates by write enabling Sample Rate Registers 2C-34h. 2. Enables the on demand CODEC-to-Controller signaling protocol using SLOTREQ bits that becomes necessary when a DAC's sample rate varies from the 48 KHz AC-Link serial frame rate. The table below summarizes the behavior: Table 6. VRA Behavior AC`97 Functionality VRA = 0 VRA = 1 SLOTREQ bits always 0 (data each frame) 0 or 1 (data on demand) sample rate registers forced to 48 KHz writable Note: If more than one CODEC is being used with the SAME controller DMA engine, VRA should NOT be used. For variable sample rate output, the CODEC examines its sample rate control registers, the state of its FIFOs, and the incoming SDATA_OUT tag bits at the beginning of each AC-Link output frame to determine which SLOTREQ bits to set active (low). SLOTREQ bits asserted during the current AC-Link input frame signal which active output slots require data from the AC`97 Digital Controller in the next audio output frame. An active output slot is defined as any slot supported by the CODEC that is not in a power-down state. For fixed 48 KHz operation the SLOTREQ bits are always set active (low) and a sample is transferred in each frame. For variable sample rate input, the tag bit for each input slot indicates whether valid data is present or not. Thus, even in variable sample rate mode, the CODEC is always the master: for SDATA_IN (CODEC to Controller), the CODEC sets the TAG bit; for SDATA_OUT (Controller to CODEC), the CODEC sets the SLOTREQ bit and then checks for the TAG bit in the next frame. The VRM (Variable Rate Mic Audio) bit in the Extended Audio Status and Control Register controls the optional MIC ADC input behavior in the same way that VRA = 1 controls the PCM ADC. 5.2.2.1. SLOTREQ Behavior and Power Management SLOTREQ bits for fixed rate, powered down, and all unsupported Slots should be driven with 0s for maximum compatibility with the original AC '97 Component Specification. When a DAC channel is powered down, it disappears completely from the serial frame: output tag and slot are ignored, and the SLOTREQ bit is absent (forced to zero). TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 34 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack When the Controller wants to power-down a channel, all it needs to do is: 1. Disable source of DAC samples in Controller 2. Set PR bit for DAC channel in Registers 26h, 2Ah, or 3Eh When it wants to power up the channel, all it needs to do is: 1. Clear PR bit for DAC channel in Registers 26h, 2Ah, or 3Eh 2. Enable source of DAC samples in Controller 5.2.3. Primary and Secondary CODEC Register Addressing The 2-bit CODEC ID field in the LSBs of Output Slot 0 is an addition to the original AC-Link protocol that enables an AC`97 Digital Controller to independently access Primary and Secondary CODEC registers. For Primary CODEC access, the AC`97 Digital Controller: 1. Sets the AC-Link Frame valid bit (Slot 0, bit 15). 2. Validates the tag bits for Slot 1 and 2 Command Address and Data (Slot 0, bits 14 and 13). 3. Sets a zero value (00) into the CODEC ID field (Slot 0, bits 1 and 0). 4. Transmits the desired Primary CODEC Command Address and Command Data in Slots 1 and 2. For Secondary CODEC access, the AC`97 Digital Controller: 1. Sets the AC-Link Frame valid bit (Slot 0, bit 15). 2. Places a non-zero value (01, 10, or 11) into the CODEC ID field (Slot 0, bits 1 and 0). 3. Transmits the desired Secondary CODEC Command Address and Command Data in Slots 1 and 2. Secondary CODECs disregard the Command Address and Command Data (Slot 0, bits 14 and 13) tag bits. In a sense the Secondary CODEC ID field functions as an alternative Valid Command Address (for Secondary reads and writes) and Command Data (for Secondary writes) tag indicator. Secondary CODECs must monitor the Frame Valid bit, and ignore the frame (regardless of the state of the Secondary CODEC ID bits) if it is not valid. AC`97 Digital Controllers should set the frame valid bit for a frame with a Secondary register access, even if no other bits in the output tag slot except the Secondary CODEC ID bits are set. 5.3. AC-Link Output Frame (SDATA_OUT) The AC-Link output frame data streams correspond to the multiplexed bundles of all digital output data targeting AC`97's DAC inputs, and control registers. As mentioned earlier, each AC-Link output frame supports up to twelve 20-bit outgoing data time slots. Slot 0 is a special reserved time slot containing 16-bits which are used for AC-Link protocol infrastructure. Figure 15 illustrates the time slot based AC-Link protocol. Figure 15. AC-Link Audio Output Frame A new AC-Link output frame begins with a low to high transition of SYNC. SYNC is synchronous to the rising edge of BIT_CLK. On the immediately following falling edge of BIT_CLK, the AC`97 CODEC samples the assertion of SYNC. This falling edge marks the time when both sides of AC-Link are aware of the start of a new audio frame. On the next rising of BIT_CLK, the AC`97 Controller transitions SDATA_OUT into the first bit position of slot 0 (Valid Frame bit). Each new bit posiTSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 35 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Data Phase Tag Phase SYNC 20.8 uS (48 kHZ) 12.288 MHz BIT_CLK valid Frame SDATA_OUT slot1 slot2 slot(12) "0" CID1 CID0 19 "0" 19 "0" 19 "0" 19 "0" End of previous audio frame Time Slot "Valid" Bits ("1" = time slot contains valid PCM data) Slot 1 Slot 2 Slot 3 Slot 12 tion is presented to AC-Link on a rising edge of BIT_CLK, and subsequently sampled by the AC`97 CODEC on the following falling edge of BIT_CLK. This sequence ensures that data transitions and subsequent sample points for both incoming and outgoing data streams are time aligned. Figure 16. Start of an Audio Output Frame S Y N C d e te c te d b y c o d e c S Y N C a s s e rte d f ir s t S D A T A _ O U T b it o f f r a m e S Y N C B IT _ C L K v a lid F ra m e S D A T A _ O U T E n d o f p r e v io u s a u d io s lo t 1 s lo t 2 fra m e SDATA_OUT's composite stream is MSB justified (MSB first) with all non-valid slots' bit positions stuffed with 0s by the AC`97 Controller. If there are less than 20 valid bits within an assigned and valid time slot, the AC`97 Controller always stuffs all trailing non-valid bit positions of the 20-bit slot with 0s. As an example, consider an 8-bit sample stream that is being played out to one of the STAC9752A/9753A DACs. The first 8-bit positions are presented to the DAC (MSB justified) followed by the next 12 bit-positions which are stuffed with 0s by the AC`97 Controller. This ensures that regardless of the resolution of the implemented DAC (16, 18 or 20-bit), no DC biasing will be introduced by the least significant bits. When mono audio sample streams are output from the AC`97 Controller it is necessary that BOTH left and right sample stream time slots be filled with the same data. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 36 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 5.3.1. Slot 0: TAG / CODEC ID Table 7. Output Slot 0 Bit Definitions Bit Description 15 Frame Valid 14 Slot 1 Primary CODEC Valid Command Address bit (Primary CODEC only) 13 Slot 2 Primary CODEC Valid Command Data bit (Primary CODEC only) 12-3 Slot 3-12 Valid Data bits 12 Slot 3: PCM Left channel 11 Slot 4: PCM Right channel 10 Slot 5: Modem Line 1 (not used on STAC9752A/9753A) 9 Slot 6: Alternative PCM1 Left 8 Slot 7: Alternative PCM2 Left 7 Slot 8: Alternative PCM2 Right 6 Slot 9: Alternative PCM1 Right 5 Slot 10: SPDIF Left 4 Slot 11: SPDIF Right 3 Slot 12: Audio GPIO 2 Reserved (Set to 0) 1-0 2-bit CODEC ID field (00 reserved for Primary; 01, 10, 11 indicate Secondary) Note: The DAC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. Within slot 0 the first bit is a global bit (SDATA_OUT slot 0, bit 15) which flags the validity for the entire audio frame. If the "Valid Frame" bit is a 1, this indicates that the current audio frame contains at least one time slot of valid data. The next 12 bit positions sampled by AC`97 indicate which of the corresponding 12 time slots contain valid data. In this way data streams of differing sample rates can be transmitted across AC-Link at its fixed 48 KHz audio frame rate. The two LSBs of Slot 0 transmit the CODEC ID used to distinguish Primary and Secondary CODEC register access. 5.3.2. Slot 1: Command Address Port The command port is used to control features, and monitor status (see AC-Link input frame Slots 1 and 2) for AC`97 CODEC functions including, but not limited to, mixer settings, and power management (refer to the control register section of this specification). The control interface architecture supports up to 64 16-bit read/write registers, addressable on even byte boundaries. Only the even registers (00h, 02h, etc.) are currently defined, odd register (01h, 03h, etc.) accesses are reserved for future expansion. Note that shadowing of the control register file on the AC`97 Controller is an option left open to the implementation of the AC`97 Controller. The AC`97 CODEC's control register file is nonetheless required to be readable as well as writeable to provide more robust testability. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 37 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack AC-Link output frame slot 1 communicates control register address, and write/read command information to the STAC9752A/9753A. Table 8. Command Address Port Bit Assignments Bit Description Comments 19 Read/Write command 1 = read, 0 = write 18:12 Control Register Index sixty-four 16-bit locations, addressed on even byte boundaries 11:0 Reserved Stuffed with 0s The first bit (MSB) sampled by AC`97 indicates whether the current control transaction is a read or a write operation. The following 7 bit positions communicate the targeted control register address. The trailing 12 bit positions within the slot are reserved and must be stuffed with 0s by the AC`97 Controller. 5.3.3. Slot 2: Command Data Port The command data port is used to deliver 16-bit control register write data in the event that the current command port operation is a write cycle. (as indicated by Slot 1, bit 19) * Bit(19:4) Control Register Write Data (Stuffed with 0s if current operation is a read) * Bit(3:0) Reserved (Stuffed with 0s) If the current command port operation is a read then the entire slot time must be stuffed with 0s by the AC`97 Controller. 5.3.4. Slot 3: PCM Playback Left Channel AC-Link output frame slot 3 is the composite digital audio left playback stream. In a typical "Games Compatible" PC this slot is composed of standard PCM (.wav) output samples digitally mixed (on the AC`97 Controller or host processor) with music synthesis output samples. If a sample stream of resolution less than 20-bits is transferred, the AC`97 Controller must stuff all trailing non-valid bit positions within this time slot with 0s. The DAC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. 5.3.5. Slot 4: PCM Playback Right Channel AC-Link output frame slot 4 is the composite digital audio right playback stream. In a typical "Games Compatible" PC this slot is composed of standard PCM (.wav) output samples digitally mixed (on the AC`97 Controller or host processor) with music synthesis output samples. If a sample stream of resolution less than 20-bits is transferred, the AC`97 Controller must stuff all trailing non-valid bit positions within this time slot with 0s. The DAC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. 5.3.6. Slot 5: NOT USED (Modem Line 1 Output Channel) Audio output frame slot 5 is reserved for modem operation and is not used by the STAC9752A/9753A. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 38 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 5.3.7. Slot 6 -11: DAC The DAC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. 5.3.8. Slot 12: Audio GPIO Control Channel AC-Link output frame slot 12 contains the audio GPIO control outputs. 5.4. AC-Link Input Frame (SDATA_IN) The AC-Link input frame data streams correspond to the multiplexed bundles of all digital input data targeting the AC`97 Controller. As is the case for an audio output frame, each AC-Link input frame consists of twelve 20-bit time slots. Slot 0 is a special reserved time slot containing 16-bits which are used for AC-Link protocol infrastructure. The following diagram illustrates the time slot-based AC-Link protocol. Figure 17. STAC9752A/9753A Audio Input Frame Data Phase Tag Phase SYNC 20.8 uS (48 kHZ) 12.288 MHz BIT_CLK valid Frame SDATA_IN slot1 slot2 slot(12) "0" "0" "0" 19 "0" 19 "0" 19 "0" 19 "0" End of previous audio frame Time Slot "Valid" Bits Slot 1 Slot 2 Slot 3 Slot 12 ("1" = time slot contains valid PCM data) A new AC-Link input frame begins with a low to high transition of SYNC. SYNC is synchronous to the rising edge of BIT_CLK. On the immediately following falling edge of BIT_CLK, the AC`97 CODEC samples the assertion of SYNC. This falling edge marks the time when both sides of AC-Link are aware of the start of a new audio frame. On the next rising of BIT_CLK, the AC`97 CODEC transitions SDATA_IN into the first bit position of slot 0 ("CODEC Ready" bit). Each new bit position is presented to AC-Link on a rising edge of BIT_CLK, and subsequently sampled by the AC`97 Controller on the following falling edge of BIT_CLK. This sequence ensures that data transitions and subsequent sample points for both incoming and outgoing data streams are time aligned. Figure 18. Start of an Audio Input Frame S Y N C d e te c te d f ir s t S D A TA _O U T b it o f f r a m e S Y N C B IT _ C L K C odec R eady S D A T A _ IN s lo t 1 s lo t 2 E n d o f p r e v io u s a u d io f r a m e TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 39 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack SDATA_IN's composite stream is MSB justified (MSB first) with all non-valid bit positions (for assigned and/or unassigned time slots) stuffed with 0s by the AC`97 CODEC. SDATA_IN data is sampled on the falling edges of BIT_CLK. 5.4.1. Slot 0: TAG Within slot 0, the first bit is a global bit (SDATA_IN slot 0, bit 15) which flags whether the AC`97 CODEC is in the "CODEC Ready" state or not. If the "CODEC Ready" bit is a 0, this indicates that the AC`97 CODEC is not ready for normal operation. This condition is normal following the deassertion of power on reset for example, while the AC`97 CODEC's voltage references settle. When the AC-Link "CODEC Ready" indicator bit is a 1 it indicates that the AC-Link and AC`97 CODEC control and status registers are in a fully operational state. CODEC must assert "CODEC Ready" within 400 ms after it starts receiving valid SYNC pulses from the controller, to provide indication of connection to the link and Control/Status registers are available for access. The AC'97 Controller and related software must wait until all of the lower four bits of the Control/Status Register, 26h, are set before attempting any register writes, or attempting to enable any audio stream, to avoid undesirable audio artifacts. Prior to any attempts at putting an AC`97 CODEC into operation, the AC`97 Controller should poll the first bit in the AC-Link input frame (SDATA_IN slot 0, bit 15) for an indication that CODEC has gone "CODEC Ready". Once an AC`97 CODEC is sampled "CODEC Ready"1 then the next 12 bit positions sampled by the AC`97 Controller indicate which of the corresponding 12 time slots are assigned to input data streams, and that they contain valid data. 5.4.2. Slot 1: Status Address Port / SLOTREQ Signaling Bits 5.4.2.1. Status Address Port The status port is used to monitor status for the STAC9752A/9753A functions including, but not limited to, mixer settings and power management. AC-Link input frame slot 1's stream echoes the control register index, for historical reference, for the data to be returned in slot 2. (Assuming that slots 1 and 2 had been tagged "valid" by the AC`97 CODEC during slot 0. Table 9. Status Address Port Bit Assignments Bit Description Comments 19 Reserved Stuffed with 0s 18:12 Control Register Index Echo of register index for which data is being returned 11:2 SLOTREQ See Section 5.4.2.2: page 40 1:0 Reserved Stuffed with 0s The first bit (MSB) generated by AC`97 is always stuffed with a 0. The following 7 bit positions communicate the associated control register address, the next 10 bits support AC`97's variable sample rate signaling protocol, and the trailing 2 bit positions are stuffed with 0s by AC`97. 5.4.2.2. SLOTREQ signaling bits AC-Link input frame Slot #1, the Status Address Port, now delivers CODEC control register read address and variable sample rate slot request flags for all output slots. Ten of the formerly reserved least significant bits have been defined as data request flags for output slots 3-12. 1. There are several subsections within an AC`97 CODEC that can independently go busy/ready. It is the responsibility of the AC'97 Controller to probe more deeply into the AC`97 CODEC's register file to determine which subsections are actually ready. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 40 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack The AC-Link input frame Slot 1 tag bit is independent of the bit 11-2 slot request field, and ONLY indicates valid Status Address Port data (Control Register Index). The CODEC should only set SDATA_IN tag bits for Slot 1 (Address) and Slot 2 (Data) to 1 when returning valid data from a previous register read. They should otherwise be set to 0. SLOTREQ bits have validity independent of the Slot 1 tag bit. SLOTREQ bits are always 0 in the following cases * Fixed rate mode (VRA = 0) * Inactive (powered down) ADC channel SLOTREQ bits are only set to 1 by the CODEC in the following case * 5.4.3. Variable rate audio mode (VRA = 1) AND active (power ready) ADC AND a non-48 KHz ADC sample rate and CODEC does not need a sample Slot 2: Status Data Port The status data port delivers 16-bit control register read data. Table 10. Status Data Port Bit Assignments Bit Description Comments 19:4 Control Register Read Data Stuffed with 0s if tagged "invalid" 3:0 Reserved Stuffed with 0s If Slot 2 is tagged invalid by AC`97, then the entire slot will be stuffed with 0s by AC`97. 5.4.4. Slot 3: PCM Record Left Channel Audio input frame slot 3 is the left channel output of STAC9752A/9753A input MUX, post-ADC. STAC9752A/9753A ADCs are implemented to support 20-bit resolution. NOTE: The ADC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. 5.4.5. Slot 4: PCM Record Right Channel Audio input frame slot 4 is the right channel output of STAC9752A/9753A input MUX, post-ADC. STAC9752A/9753A ADCs are implemented to support 20-bit resolution. NOTE: The ADC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. 5.4.6. Slot 5: NOT USED (Modem Line 1 ADC) Audio input frame slot 5 is not used by the STAC9752A/9753A and is always stuffed with 0s. 5.4.7. Slot 6-9: ADC The left and right ADC channels of the STAC9752A/9753A may be assigned to slots 6&9 by Register 6Eh. NOTE: The ADC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 41 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 5.4.8. Slots 7-8: Vendor Reserved The left and right ADC channels of the STAC9752A/9753A may be assigned to slots 7&8 by Register 6Eh. NOTE: The ADC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. 5.4.9. Slot 10 & 11: ADC The left and right ADC channels of the STAC9752A/9753A may be assigned to slots 10&11 by Register 6Eh. NOTE: The ADC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. 5.4.10. Slot 12: Reserved AC-Link input frame slot 12 contains the GPIO status inputs and allows for audio interrupts. Slot 12 can be used by the AC'97 CODEC is a modem CODEC is not present. 5.5. AC-Link Interoperability Requirements and Recommendations 5.5.1. "Atomic slot" Treatment of Slot 1 Address and Slot 2 Data Command or Status Address and Data cannot be split across multiple AC-Link frames. The following transactions require that valid Slot 1 Address and valid Slot 2 Data be treated as "atomic" (inseparable) with Slot 0 Tag bits for Address and Data set accordingly (that is, both valid): 1. AC`97 Digital Controller write commands to Primary CODECs 2. AC`97 CODEC status responses Whenever the AC`97 Digital Controller addresses a Primary CODEC or an AC`97 CODEC responds to a read command, Slot 0 Tag bits should always be set to indicate actual Slot 1 and Slot 2 data validity. Table 11. Primary CODEC Addressing: Slot 0 Tag Bits Function Slot 0, bit 15 Slot 0, bit 14 Slot 0, bit 13 Slot 0, Bits 1-0 (Valid Frame) (Valid Slot 1 Address) (Valid Slot 2 Data) (CODEC ID) AC`97 Digital Controller Primary Read Frame N, SDATA_OUT 1 1 0 00 AC`97 Digital Controller Primary Write Frame N, SDATA_OUT 1 1 1 00 AC`97 CODEC Status Frame N+1, SDATA_IN 1 1 1 00 When the AC`97 Digital Controller addresses a Secondary CODEC, the Slot 0 Tag bits for Address and Data must be 0. A non-zero, 2-bit CODEC ID in the LSBs of Slot 0 indicates a valid Read or Write Address in Slot 1, and the Slot 1 R/W bit indicates presence or absence of valid Data in Slot 2. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 42 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Table 12. Secondary CODEC Addressing: Slot 0 tag bits Slot 0, bit 15 Slot 0, bit 14 Slot 0, bit 13 Slot 0, Bits 1-0 (Valid Frame) (Valid Slot 1 Address) (Valid Slot 2 Data) (CODEC ID) Function 5.6. AC`97 Digital Controller Secondary Read Frame N, SDATA_OUT 1 0 0 01, 10, or 11 AC`97 Digital Controller Secondary Write Frame N, SDATA_OUT 1 0 0 01, 10, or 11 AC`97 CODEC Status Frame N+1, SDATA_IN 1 1 1 00 Slot Assignments for Audio Figure 19. Bi-directional AC-Link Frame with Slot assignments SLOTS 0 1 2 3 4 5 6 7 8 9 10 11 12 TAG CMD ADDR CMD DATA PCM LEFT PCM RT NA PCM CTR PCM LSURR PCM RSURR PCM LFE SPDIF SPDIF IO CTRL TAG STATUS ADDR STATUS DATA PCM LEFT PCM RT LINE1 ADC PCM MIC Vendor RSVD Vendor RSVD Vendor RSVD LINE2 ADC HSET ADC IO STATUS SYNC OUTGOING STREAMS (Controller output - SDATA_OUT) INCOMING STREAMS (codec output - SDATA_IN) TAG PHASE DATA PHASE Slot 12 can be used by the AC'97 Codec if a Modem Codec is not present. The AC-link output slots (transmitted to the Codec) are defined as follows: Table 13. AC-Link Output Slots Dedicated To CODEC Slot Name Description 0 SDATA_OUT TAG MSBs indicate which slots contain valid data; LSBs convey Codec ID 1 Control CMD ADDR write port Read/write command bit plus 7-bit Codec register address 2 Control DATA write port 16-bit command register write data 3,4 PCM L & R DAC playback 16, 18, or 20-bit PCM data for left and right channels 5 Modem Line 1 DAC 16-bit modem data for modem line 1 output 6,7,8,9 PCM Center, Rear, LFE 16, 18, or 20-bit PCM data for Center, L & R Rear, LFE channels 10 Modem Line 2 DAC 16-bit modem data for modem line 2 output 11 Modem handset DAC 16-bit modem data for modem handset output 12 Modem IO control GPIO write port for modem control 10-12 Double rate audio Optional AC-link bandwidth for 88.2 or 96 kHz on L, C, R channels TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 43 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack The AC-link input slots (transmitted from the Codec) are defined as follows: Figure 20. AC-Link Input Slots Dedicated To CODEC Slot Name Description 0 SDATA_IN TAG MSBs indicate which slots contain valid data 1 STATUS ADDR read port MSBs echo register address; LSBs indicate which slots request data 2 STATUS DATA read port 16-bit command register read data 3,4 PCM L & R ADC record 16-bit PCM data from left and right inputs 5 Modem Line 1 ADC 16-bit modem data from modem line 1 input 6 Dedicated Microphone ADC 16-bit PCM data from optional 3rd ADC input 7,8,9 Vendor reserved Vendor specific (enhanced input for docking, array mic, etc) 10 Modem Line 2 ADC 16-bit modem data from modem line 2 input 11 Modem handset input 16-bit modem data for modem handset input 12 Modem IO status GPIO read port for modem control Note: The DAC & ADC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. The AC-Link output slots dedicated to audio are defined as follows: Table 14. AC-Link Output Slots Dedicated To Audio Slot Name Description 3 PCM L DAC playback 20-bit PCM data for left channel 4 PCM R DAC playback 20-bit PCM data for right channel 6 PCM Center 20-bit PCM data for Center channel 7 PCM L Surround 20-bit PCM data for L Surround channel 8 PCM R Surround 20-bit PCM data for R Surround channel 9 PCM LFE 20-bit PCM data for LFE channel 10:11 SPDIF Out 20-bit SPDIF Output 12 Reserved Reserved The AC-Link input slots dedicated to audio are defined as follows: Table 15. AC-Link Input Slots Dedicated To Audio Slot Name Description 3 PCM L ADC record 20-bit PCM data from left input 4 PCM R ADC record 20-bit PCM data from right inputs 6 Dedicated Microphone ADC 20-bit PCM data from optional 3rd ADC input 7 Vendor reserved Vendor specific (enhanced input for docking, array mic, etc.) 8 Vendor reserved Vendor specific (enhanced input for docking, array mic, etc.) 9 Vendor reserved Vendor specific (enhanced input for docking, array mic, etc.) 12 Audio Interrupt Provides optional interrupt capability for Audio CODEC (not usable when a modem is present) Note: The ADC can be assigned to slots 3&4, 6&9, 7&8, or 10&11. Table 16. Audio Interrupt Slot Definitions Bit Description 19-1 Reserved (Audio CODEC will return zeros in bits 19-1) 0 Optional: Assertion = 1 will cause interrupt to be propagated to Audio controller system interrupt. See register 24h definition for enabling mechanism. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 44 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 6. STAC9752A/9753A FUNCTIONAL BLOCKS 6.1. STAC9752A/9753A Mixer Description The STAC9752A/9753A includes an analog mixer for maximum flexibility. The analog mixer is designed to the AC'97 specification to manage the record and playback of all digital and analog audio sources in the PC environment. The analog mixer also includes several extensions of the AC'97 specification to support "all analog record" capability as well as "POP BYPASS" mode for all digital playback. The analog sources include: * System Audio: digital PCM input and output for business, games & multimedia * CD/DVD: analog CD/DVD-ROM audio with internal connections to CODEC mixer * Stereo or Mono microphone: choice of desktop mic, with programmable boost and gain * Speakerphone: use of system mic and speakers for telephone, DSVD, and video conferencing * Video: TV tuner or video capture card with internal connections to CODEC mixer * AUX/synth: analog FM or wavetable synthesizer, or other internal source * Line in: external analog line-level source from consumer audio, video camera, etc. Source Function Connection PC_BEEP PC BEEP pass through to LINE_OUT from PC_BEEP output PHONE MONO input from telephony subsystem MIC1 desktop microphone from stereo or mono mic jack MIC2 second microphone from stereo or second mono mic jack LINE_IN external audio source from line-in jack CD audio from CD-ROM cable from CD-ROM VIDEO audio from TV tuner or video camera cable from TV or VidCap card AUX upgrade synth or other external source internal connector PCM out digital audio output from AC'97 Controller AC-Link Destination Function Connection To headphone out jack HP_OUT stereo mix of all sources LINE_OUT stereo mix of all sources To output jack MONO_OUT mic or MONO Analog mixer output to telephony subsystem PCM in digital data from the CODEC to the AC'97 Controller AC-Link SPDIF SPDIF digital audio output To SPDIF output connector TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 45 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 6.1.1. Mixer Functional Diagrams Figure 21. STAC9752A/9753A 2-Channel Mixer Functional Diagram mute HP 28h: D5-D4 3D 20h:D13 22h:D2-D3 DA C 1 (FRONT) 02h vol mute LO 78h D 3 & 20h D15 18h vol Mic Mux 78h D9:D 8 0Ch L R R L R Left C h. M ic V IDEO 78h D 11:D10 0Eh:D 6 & 6Eh:D 2 78h D7 & 20h D 8 -6dB 30 dB 0Eh vol R ig ht C h. M ic 10h vol vol 18,20 16h 14,15 vol 14h 16,17 mute 20h:D 13 22h:D 2-D 3 PINS 21/22 1/2 06h vol mute 37 + 0 dB MONO_OUT -6dB 20h:D9,D15 MUX 6Eh:D12 mute AC Link SD ATA_OUT Slots 6Eh : D4-5 3&4, 7&8, 6&9, 10&11 -6dB mute MUX vol mute -6dB 3D mute traditionally Line In L/R -6dB -6dB 12h CD AUX mute MUX MUX MUX L vol mute PINS 23/24 MUX vol 13 PHONE Analog Audio Input Sources 0Ah 12 LIN E_OU T traditionally M ic Line In Mux Digital PCBeep PC_BEEP traditionally If both are s elec ted, HP wi ll be on and Li ne Out is Off 23/24 78h D 13:D 12 mute H P_OU T PINS 35/36 35/36 MUX Slot Selec t 78h D 15:D 14 SEL MUX 78h D 4 & 20h D 15 PINS 39/41 traditionally MUX vol SEL MUX 39/41 04h 1C h vol mute + 22 dB Slot Selec t STEREO A DC PCMIn 2A h:D5-D4 6.1.2. Slot Select 48 SPDIF_OUT Mixer Analog Input The mixer provides recording and playback of any audio sources or output mix of all sources. The STAC9752A/9753A supports the following input sources: * Any mono or stereo source * Mono or stereo mix of all sources * Two-channel input w/mono output reference (mic or stereo mix) Note: All unused inputs should be tied together and connected to ground through a capacitor (0.1 mF suggested). Note: The MIC inputs should be tied to ground through a separate capacitor (0.1 mF suggested). 6.1.3. Mixer Analog Output The mixer generates three distinct outputs: 6.2. * A stereo mix of all sources for output to the LINE_OUT * A stereo mix of all sources for output to HP_OUT * A mono, mic only or mix of all sources for MONO_OUT SPDIF Digital Mux The STAC9752A/9753A incorporates a digital output that supports SPDIF formats. A multiplexer determines which of two digital input streams are used for the digital output conversion process. These two streams include the PCM OUT data from the audio controller and the ADC recorded output. The normal analog LINE_OUT signal can be converted to the SPDIF formats by using the internal ADC to record the "MIX" output, which is the combination of all analog and all digital sources. In the case of digital controllers with support for four or more channels, the SPDIF output mode can be TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 46 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack used to support compressed 6-channel output streams for delivery to home theater systems. These can be routed on alternate AC-Link slots to the SPDIF output, while the standard 2-channel output is delivered as selected by bits D5 and D4 in Register 6E. If the digital controller supports six channels, a SPDIF output with four analog channels can also be configured. If the Digital Controller has independent DMA engines, SPDIF and Analog can be used simultaneously and independently. 6.3. PC Beep Implementation The STAC9752A/9753A offers two styles of PC BEEP, Analog and Digital. The digital PC BEEP is a new feature added to the AC'97 Specification Rev 2.3. This style of PC BEEP will eventually replace the Analog style, thus eliminating the need for a PC BEEP pin. Until this feature is widely accepted, TSI will provide BOTH styles of PC BEEP. Both PC BEEP styles use Reg 0Ah. Additional information about Reg0Ah can be found in Section 7.1.5: page 51. 6.3.1. Analog PC Beep PC Beep is active on power up and defaults to an un-muted state. The PC_BEEP input is routed directly to the MONO_OUT, LINE_OUT and HP_OUT pins of the CODEC. Because the PC_BEEP input drive is often a full scale digital signal, some resistive attenuation of the PC_BEEP input is recommended to keep the beep tone within reasonable volume levels. The user should mute this input before using any other mixer input because the PC Beep input can contribute noise to the lineout during normal operation. This style of PC BEEP is related to the AC'97 Specification Rev 2.2. To use the analog PC BEEP, write a value of 00h to bits F[7:0](D[12:5]) to disable the Digital PC Beep generation. PV[3:0] (D[4:1]) controls the volume level from 0 to 45dB of attenuation in 3dB steps. 6.3.2. Digital PC Beep The Digital PC Beep uses the identical register as the Analog style, Reg 0Ah. This register controls the level and frequency for the PC BEEP. The beep frequency is the result of dividing the 48 KHz clock by 2 times the number specified in F[7:0] +2, allowing tones from 94 Hz to 12 KHz. A value of 00h written to bits F[7:0] disables the digital PC Beep generation and enables the analog style PC BEEP. The volume control bits, PV[3:0] operate identically to the analog PC BEEP mode. Applying a signal to the PC BEEP pin, pin 12, may cause the digital PC BEEP signal to become distorted or inaudible. When using the digital PC BEEP feature, it is recommended to leave the PC BEEP input pin unconnected or connected to analog ground through a capacitor. Connecting a capacitor from the PC BEEP input pin to ground will create a more pleasing sound by changing the digital output to a more sinusoidal signal. Table 17. Digital PC Beep Examples Value Reg 0Ah Frequency 1 0x01 12,000Hz 10 0x0A 1200Hz 25 0x19 480Hz 50 0x32 240Hz 100 0x64 120Hz 127 0x0F 94.48Hz 255 0xFF 47.05Hz This will be programmed directly by the BIOS. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 47 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7. PROGRAMMING REGISTERS Table 18. Programming Registers Address Name Default Location 6A90h 7.1.1; page 49 00h Reset 02h Master Volume 8000h 7.1.2; page 49 04h HP_OUT Mixer Volume 8000h 7.1.3; page 50 06h Master Volume MONO 8000h 7.1.4; page 51 0Ah PC Beep Mixer Volume 0000h 7.1.5; page 51 0Ch Phone Mixer Volume 8008h 7.1.6; page 52 0Eh Mic Mixer Volume 8008h 7.1.7; page 52 10h Line In Mixer Volume 8808h 7.1.8; page 53 12h CD Mixer Volume 8808h 7.1.9; page 54 14h Video Mixer Volume 8808h 7.1.10; page 54 16h Aux Mixer Volume 8808h 7.1.11; page 55 18h PCM Out Mixer Volume 8808h 7.1.12; page 55 1Ah Record Select 0000h 7.1.13; page 56 1Ch Record Gain 8000h 7.1.14; page 57 20h General Purpose 0000h 7.1.15; page 57 22h 3D Control 0000h 7.1.16; page 58 24h Audio Int. & Paging 0000h 7.1.17: page 58 26h Powerdown Ctrl/Stat 000Fh 7.1.18; page 59 28h Extended Audio ID 0A05h 7.1.19; page 61 2Ah Extended Audio Control/Status 0400h* 7.1.20; page 62 2Ch PCM DAC Rate BB80h 7.1.22; page 64 32h PCM LR ADC Rate BB80h 7.1.23; page 64 3Ah SPDIF Control 2000h 7.1.24; page 65 3Eh Extended Modem Stat/Ctl 0100h 7.2.4; page 66 4Ch GPIO Pin Configuration 0003h 7.2.5; page 67 4Eh GPIO Pin Polarity/Type FFFFh 7.2.6; page 67 50h GPIO Pin Sticky 0000h 7.2.7; page 67 52h GPIO Wake-up 0000h 7.2.8; page 68 54h GPIO Pin Status 0000h 7.2.9; page 68 60h CODEC Class/Rev 1201h 7.3; page 68 62h (Page 01h) PCI SVID FFFFh 7.4.2; page 70 64h (Page 01h) PCI SSID FFFFh 7.4.3; page 70 66h (Page 01h) Function Select 0000h 7.4.4; page 71 xxxxh 7.4.5; page 72 0000h 7.4.6; page 74 68h (Page 01h) Function Information 6Ah Digital Audio Control 6Ah (Page01h) Sense Details 6Ch Revision Code 6Ch (Page01h) Reserved 6Eh Analog Special 6Eh (Page01h) Reserved NA 7.4.7: page 74 xxxxh 7.4.7; page 74 0000h NA 1000h 7.4.9: page 76 0000h NA 70h Enable Register 0000h NA 72h Analog Current Adjust 0000h 7.4.10; page 77 74h EAPD Access 0800h 7.4.11; page 78 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 48 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Table 18. Programming Registers Address Name Default Location 76h Register 78h Enable 0000h 7.4.11; page 78 78h High Pass Filter Bypass 0000h 7.4.11; page 78 7Ah Universal JacksTM Selection 0000h 7.4.11; page 78 7Ch Vendor ID1 8384h 7.5.1; page 80 7Eh Vendor ID2 7652h 7.5.2; page 80 Note: * depends upon CODECID 7.1. Register Descriptions 7.1.1. Reset (00h) Default: 6A90h D15 D14 D13 D12 D11 D10 D9 D8 RSRVD SE4 SE3 SE2 SE1 SE0 ID9 ID8 D7 D6 D5 D4 D3 D2 D1 D0 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 Writing any value to this register performs a register reset, which causes all registers to revert to their default values. This register reset also resets all the digital block. Reading this register returns the ID code of the part. Bit(s) Reset Value Name 15 0 Reserved Bit not used, should read back 0 14:10 11010 SE4:SE0 TSI ID for SS3D 9 1 ID9 20 Bit ADC Resolution (Supported) 8 0 ID8 18 Bit ADC Resolution 7 1 ID7 20 Bit DAC Resolution (Supported) 6 0 ID6 18 Bit DAC Resolution 5 0 ID5 Loudness (Bass Boost) 4 1 ID4 Headphone Out (Supported) 3 0 ID3 Simulated Stereo ( Mono To Stereo ) 2 0 ID2 Bass & Treble Control 1 0 ID1 Reserved 0 0 ID0 Dedicated Mic PCM IN Channel 7.1.2. Description Master Volume Registers (02h) Default: 8000h D15 D14 D13 D12 D11 D10 D9 D8 Mute RSRVD ML5 ML4 ML3 ML2 ML1 ML0 D7 D6 D5 D4 D3 D2 D1 D0 MR5 MR4 MR3 MR2 MR1 MR0 Reserved TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 49 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name 15 1 Mute 14 0 Reserved 13 0 ML5 Description 0 = No mute 1 = Mutes both left & right channels Bit not used, should read back 0 0 = Lineout attenuation is a function of bits12-8 1 = Forces register bits 12-8 to be 11111 Always reads back 0 12:8 0 ML<4:0> Left Lineout Volume Control 00000 = 0dB attenuation 00001 = 1.5dB attenuation ..... 11111 = 46.5dB attenuation 7:6 0 Reserved Bits not used, should read back 0 5 0 MR5 4:0 7.1.3. 0 MR<4:0> 0 = Lineout attenuation is a function of bits 4-0 1 = Forces register bits 4-0 to be 11111 Always reads back 0 Right Channel Lineout Volume Control 00000 = 0dB attenuation 00001 = 1.5dB attenuation ..... 11111 = 46.5dB attenuation Headphone Volume Registers (04h) Default: 8000h D15 D14 D13 D12 D11 D10 D9 D8 Mute RSRVD HPL5 HPL4 HPL3 HPL2 HPL1 HPL0 D7 D6 D5 D4 D3 D2 D1 D0 HPR5 HPR4 HPR3 HPR2 HPR1 HPR0 Reserved Bit(s) Reset Value Name 15 1 Mute 14 0 Reserved 13 0 ML5 Description 0 = No mute 1 = Mutes both left & right channels Bit not used, should read back 0 0 = Headphone attenuation is a function of bits12-8 1 = Forces register bits 12-8 to be 11111 Always reads back 0 12:8 0 ML<4:0> Left Headphone Volume Control 00000 = 0dB attenuation 00001 = 1.5dB attenuation ..... 11111 = 46.5dB attenuation 7:6 0 Reserved Bits not used, should read back 0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 50 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name 5 0 MR5 4:0 7.1.4. 0 MR<4:0> Description 0 = Headphone attenuation is a function of bits 4-0 1 = Forces register bits 4-0 to be 11111 Always reads back 0 Right Channel Headphone Volume Control 00000 = 0dB attenuation 00001 = 1.5dB attenuation ..... 11111 = 46.5dB attenuation Master Volume MONO (06h) Default: 8000h D15 D14 D13 D12 Mute D7 D6 Reserved D9 D8 D5 D4 D3 D2 D1 D0 MM4 MM3 MM2 MM1 MM0 Reset Value Name 15 1 Mute 14:6 0 Reserved 5 0 MM5 7.1.5. D10 MM5 Bit(s) 4:0 D11 Reserved 0 MM<4:0> Description 0 = no mute 1 = mute mono Bit not used, should read back 0 0 = Mono attenuation is a function of bits 4-0 1 = Forces register bits 4-0 to be 11111 Always reads back 0 Mono Volume Control 00000 = 0dB attenuation 00001 = 1.5dB attenuation ..... 11111 = 46.5dB attenuation PC BEEP Volume (0Ah) Default: 0000h Additional information on the PC Beep can be found in Section 6.3: page 47. D15 D14 Mute D13 Reserved D12 D11 D10 D9 D8 F7 F6 F5 F4 F3 D7 D6 D5 D4 D3 D2 D1 D0 F2 F1 F0 PV3 PV2 PV1 PV0 RSRVD Bit(s) Reset Value Name 15 1 Mute 14:13 0 Reserved TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Description 0 = No mute 1 = Mute PC BEEP Bit not used, should read back 0 51 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name Description The Beep frequency is the result of dividing the 48KHz clock by 4 times the number specified in F[7:0] allowing tones from 47Hz to 12KHz. 12:5 00h F[7:0] A value of 00h in bits F[7:0] disables internal PC BEEP generation and enables external PC BEEP input if available. 4:1 0 PV(3:0) 0 0 Reserved 7.1.6. PCBEEP Volume Control 0000 = 0dB attenuation 0001 = 3dB attenuation ..... 1111 = 45dB attenuation Bit not used, should read back 0 Phone Volume (Index 0Ch) Default: 8008h. D15 D14 D13 D12 D6 D5 D4 GN4 Mute D11 D10 D9 D8 D3 D2 D1 D0 GN3 GN2 GN1 GN0 D10 D9 D8 Reserved D7 Reserved Bit(s) Reset Value Name 15 1 Mute 14:5 0 Reserved Bit not used, should read back 0 GN<4:0> Phone Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 4:0 7.1.7. 0 Description 0 = No mute 1 = Mute phone Stereo or Mic Volume (Index 0Eh) To enable Stereo Mic, Register 78h (unlocked), bit D6 must be enabled. In Stereo mode, the left and right volume is controlled by GN4:GN0. Default: 8008h. D15 D14 D13 D12 D7 D6 D5 D4 D3 D2 D1 D0 Reserved BOOSTEN Reserved GN4 GN3 GN2 GN1 GN0 Mute D11 Reserved Bit(s) Reset Value Name 15 1 Mute 14:7 0 Reserved TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Description 0 = no mute 1 = mute phone Bit not used, should read back 0 52 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name 6 0 BOOSTEN 5 0 Reserved 4:0 7.1.8. 0 GN<4:0> Description Works with MICGAINVAL (Register 6Eh Bit D2) BOOSTEN MICGAINVAL = Mic Gain Boost 0 0 = 0 dB 0 1 = 10 dB 1 0 = 20 dB 1 1 = 30 dB Phone Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain LineIn Volume (Index 10h) Default: 8808h. D15 D14 Mute D13 Reserved D7 D6 D5 Reserved D12 D11 D10 D9 D8 GL4 GL3 GL2 GL1 GR0 D4 D3 D2 D1 D0 GR4 GR3 GR2 GR1 GR0 Bit(s) Reset Value Name Description 15 1 Mute 14:13 0 Reserved Bit not used, should read back 0 0 = no mute 1 = mute linein 12:8 0 GL<4:0> Left LineIn Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 7:5 0 Reserved Bit not used, should read back 0 GR<4:0> Right LineIn Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 4:0 0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 53 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.1.9. CD Volume (Index 12h) Default: 8808h. D15 D14 Mute D13 Reserved D7 D6 D5 Reserved D12 D11 D10 D9 D8 GL4 GL3 GL2 GL1 GR0 D4 D3 D2 D1 D0 GR4 GR3 GR2 GR1 GR0 Bit(s) Reset Value Name Description 15 1 Mute 14:13 0 Reserved Bit not used, should read back 0 0 = no mute 1 = mute CD 12:8 0 GL<4:0> Left CD Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 7:5 0 Reserved Bit not used, should read back 0 GR<4:0> right CD Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 4:0 0 7.1.10. Video Volume (Index 14h) Default: 8808h. D15 D14 Mute D13 Reserved D7 D6 D5 Reserved D12 D11 D10 D9 D8 GL4 GL3 GL2 GL1 GR0 D4 D3 D2 D1 D0 GR4 GR3 GR2 GR1 GR0 Bit(s) Reset Value Name 15 1 Mute 14:13 0 Reserved Bit not used, should read back 0 GL<4:0> Left Video Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 12:8 0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Description 0 = no mute 1 = mute video 54 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name 7:5 0 Reserved Bit not used, should read back 0 GR<4:0> Right video Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 4:0 7.1.11. 0 Description Aux Volume (Index 16h) Default: 8808h. D15 D14 Mute D13 Reserved D7 D6 D5 Reserved D12 D11 D10 D9 D8 GL4 GL3 GL2 GL1 GR0 D4 D3 D2 D1 D0 GR4 GR3 GR2 GR1 GR0 Bit(s) Reset Value Name Description 15 1 Mute 14:13 0 Reserved Bit not used, should read back 0 0 = no mute 1 = mute aux 12:8 0 GL<4:0> Left Aux Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 7:5 0 Reserved Bit not used, should read back 0 GR<4:0> Right Aux Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 4:0 7.1.12. 0 PCMOut Volume (Index 18h) Default: 8808h. D15 D14 Mute D13 Reserved D7 D6 D5 Reserved Bit(s) Reset Value Name 15 1 Mute 14:13 0 Reserved TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. D12 D11 D10 D9 D8 GL4 GL3 GL2 GL1 GR0 D4 D3 D2 D1 D0 GR4 GR3 GR2 GR1 GR0 Description 0 = no mute 1 = mute PCM out Bit not used, should read back 0 55 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name Description 12:8 0 GL<4:0> Left PCM Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 7:5 0 Reserved Bit not used, should read back 0 GR<4:0> Right PCM Volume Control 00000 = 12dB gain 00001 = 10.5dB gain ..... 01000 = 0dB gain ..... 11111 = -34.5dB gain 4:0 7.1.13. 0 Record Select (1Ah) Default: 0000h (corresponding to Mic in) Used to select the record source independently for right and left. D15 D14 D7 D6 D13 D12 D11 D4 D3 Reserved D5 Reserved Bit(s) Reset Value Name 15:11 0 Reserved Bits not used, should read back 0 10:8 0 SL2:SL0 7:3 0 Reserved Bits not used, should read back 0 SR2:SR0 Right Channel Input Select 000 = Mic 001 = CD In (right) 010 = Video In (right) 011 = Aux In (right) 100 = Line In (right) 101 = Stereo Mix (right) 110 = Mono Mix 111 = Phone 0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. D9 D8 SL2 SL1 SL0 D2 D1 D0 SR2 SR1 SR0 Description Left Channel Input Select 000 = Mic 001 = CD In (left) 010 = Video In (left) 011 = Aux In (left) 100 = Line In (left) 101 = Stereo Mix (left) 110 = Mono Mix 111 = Phone 2:0 D10 56 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.1.14. Record Gain (1Ch) Default: 8000h (corresponding to 0 dB gain with mute on) D15 D14 D13 Mute D12 Reserved D7 D6 D5 D4 Reserved D11 D10 D9 D8 GL3 GL2 GL1 GL0 D3 D2 D1 D0 GR3 GR2 GR1 GR0 Bit(s) Reset Value Name Description 15 1 MUTE 14:12 0 Reserved Bits not used, should read back 0 MUTES RECORD GAIN 11:8 0 GL<3:0> Left Channel Volume Control 0000 = 0dB gain 0001 = 1.5dB gain .... 1111 = 22.5dB gain 7:4 0 Reserved Bits not used, should read back 0 GR<3:0> Right Channel Volume Control 0000 = 0dB gain 0001 = 1.5dB gain .... 1111 = 22.5dB gain 3:0 7.1.15. 0 General Purpose (20h) Default: 0000h D15 D14 D13 POP BYP Reserved 3D D7 D6 D5 D12 D11 D10 Reserved D4 LOOPBACK D3 D2 D9 D8 MIX MS D1 D0 Reserved Bit(s) Reset Value Name 15 0 POP BYPASS 14 0 Reserved 13 0 3D 12:10 0 Reserved 9 0 MIX 8 0 MS 7 0 LOOPBACK 6:0 0 Reserved TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Description 0 = Normal 1 = DAC bypasses mixer and connects directly to Line Out, Headphone Out and Mono Out. Bit not used, should read back 0 0 = 3D effect disabled 1 = 3D effect enabled Bit not used, should read back 0 Mono Output select (0 = Mix, 1 = Mic) Mic select (0 = Mic1, 1 = Mic2) 1 = Enables ADC to DAC Loop Back Test 0 = Loopback Disabled Do not send in conflicting data on AC-Link while running this. Bit not used, should read back 0 57 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.1.16. 3D Control (22h) Default: 0000h D15 D14 D13 D12 D11 D10 D9 D3 D2 D1 DP3 DP2 D8 Reserved D7 D6 D5 D4 Reserved Bit(s) Reset Value Name 15:4 0 Reserved Bits not used, should read back 0 D0 Reserved Description 3:2 0 DP3,DP2 LINE_OUT SEPARATION RATIO DP3 DP2 effect 0 0 0 ( OFF ) 0 1 3 ( LOW ) 1 0 4.5 ( MED ) 1 1 6 ( HIGH ) 1:0 0 Reserved Bits not used, should read back 0 This register is used to control the 3D stereo enhancement function, TSI Surround 3D (SS3D), built into the AC'97 component. Note that register bits DP3-DP2 are used to control the separation ratios in the 3D control for LINE_OUT. SS3D provides for a wider soundstage, extending beyond the normal 2-speaker arrangement. Note that the 3D bit in the general purpose register (20h) must be set to 1 to enable SS3D functionality, which allow the bits in register 22h to take effect. The three separation ratios are implemented. The separation ratio defines a series of equations that determine the amount of depth difference (High, Medium and Low) perceived during two-channel playback. The ratios provide for options to narrow or widen the soundstage. 7.1.17. Audio Interrupt and Paging (24h) Default: 0000h D15 D14 D13 D12 D11 D10 D9 D8 I4 I3 I2 I1 I0 D7 D6 D5 D4 D3 D2 D1 D0 PG3 PG2 PG1 PG0 Reserved Bit(s) Reset Value 15 14-13 0 0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Access Read / Write Read Only Name Reserved Description I4 0 = Interrupt is clear 1 = interrupt is set Interrupt event is cleared by writing a 1 to this bit. The interrupt bit will change regardless of condition of interrupt enable (I0) status. An interrupt in the GPI in slot 12 in the ACLink will follow this bit change when interrupt enable (I0) is unmasked. I3-I2 Interrupt Cause 00 = Reserved 01 = Sense Cycle Complete, sense info available. 10 = Change in GPIO input status 11 = Sense Cycle Complete and Change in GPIO input status. These bits will reflect the general cause of the first interrupt event generated. It should be read after interrupt status has been confirmed as interrupting. The information should be used to scan possible interrupting events in proper pages. 58 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value 12 0 Access Name Read / Write Description I1 Sense Cycle 0 = Sense Cycle not in Progress 1 = Sense Cycle Start. Writing a 1 to this bit causes a sense cycle start if supported. If sense cycle is not supported this bit is read only. Interrupt Enable 0 = Interrupt generation is masked. 1 = Interrupt generation is un-masked. The driver should not un-mask the interrupt unless ensured by the AC`97 controller that no conflict is possible with modem slot 12 GPI functionality. Some AC'97 2.2 compliant controllers will not likely support audio CODEC interrupt infrastructure. In either case, Software should poll the interrupt status after initiating a sense cycle and wait for Sense Cycle Max Delay to determine if an interrupting event has occurred. 11 0 Read / Write I0 10:4 0 Read Only Reserved Bits not used, should read back 0 PG3:PG0 Page Selector 0h = Vendor Specific 1h = Page ID 01 (See Section 7.4 for additional information on the Paging Registers) ......... Fh = Reserved Pages This register is used to select a descriptor of 16 word pages between registers 60h to 6Fh. Value 0h is used to select vendor specific space to maintain compatibility with AC'97 2.2 vendor specific registers. System Software determines implemented pages by writing the page number and reading the value back. All implemented pages must be consecutive. (i.e., page 2h cannot be implemented without page 1h). These registers are not reset on RESET#. 3:0 0 7.1.18. Read / Write Powerdown Ctrl/Stat (26h) Default: 000Fh D15 D14 D13 D12 D11 D10 D9 D8 EAPD PR6 PR5 PR4 PR3 PR2 PR1 PR0 D7 D6 D5 D4 D3 D2 D1 D0 REF ANL DAC ADC Reserved Bit(s) Reset Value Name 15 0 EAPD 14 0 PR6 0 = Headphone Amp powered up 1 = Headphone Amp powered down 13 0 PR5 0 = Digital Clk active 1 = Digital Clk disable. 12 0 PR4 0 = Digital active 1 = Powerdown: PLL, AC-Link, Xtal oscillator; TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Description 1 = Forces EAPD pad to Vdd 0 = Forces EAPD pad to GND 59 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name 11 0 PR3 0 = VREF and VREFOUT are active 1 = VREF and VREFOUT are powered down, and PR2 is asserted in analog block 10 0 PR2 0 = Analog active 1 = All signal path analog is powered down 9 0 PR1 0 = DAC powered up 1 = DAC powered down 8 0 PR0 0 = ADC powered up 1 = ADC powered down 7:4 0 Reserved 3 1 REF Read Only --- VREF status 1 = VREF'S enabled 2 1 ANL Read Only ---- ANALOG MIXERS, etc. Status 1 = analog mixers ready. 1 1 DAC Read Only ---- DAC Status 1 = DAC ready to playback 0 1 ADC Read Only ---- ADC Status 1 = ADC ready to record 7.1.18.1. Description Bit not used, should read back 0 Ready Status The lower half of this register is read only status, a 1 indicating that each subsection is ready. Ready is defined as the subsection's ability to perform in its nominal state. When this register is written, the bit values that come in on AC-Link will have no effect on read-only bits 0-7. When the AC-Link "CODEC Ready" indicator bit (SDATA_IN slot 0, bit 15) is a 1, it indicates that the AC-Link and AC'97 control and status registers are in a fully operational state. The AC'97 controller must further probe this Powerdown Control/Status Register to determine exactly which subsections, if any, are ready. When this register is written, the bit values that come in on AC-Link will have no effect on read-only bits 0-7. 7.1.18.2. Powerdown Controls The STAC9752A/9753A is capable of operating at reduced power when no activity is required. The power-down state is controlled by the Powerdown Register (26h). See the section "Low Power Modes" for more information. 7.1.18.3. External Amplifier Power Down Control Output The EAPD bit (bit 15 of the Powerdown Control/Status Register (Index 26h)), directly controls the EAPD output, pin 45, and produces a logical 1 when this bit is set to logic high. This function is used to control an external audio amplifier power-down. EAPD = 0 places approximately 0V on the output pin, enabling an external audio amplifier. EAPD = 1 places approximately DVdd on the output pin, disabling the external audio amplifier. Audio amplifiers that operate with reverse polarity will likely require an external inverter to maintain software driver compatibility. EAPD can also act as a GPIO. See Section 7.4.11: page 78. The GPIO controls in Section 7.2: page 65 have no effect on EAPD. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 60 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.1.19. Extended Audio ID (28h) Default: 0A05h D15 D14 ID1 ID0 D7 D6 Reserved D13 D12 D11 D10 Reserved D9 D8 AMAP RSVD D5 D4 D3 D2 D1 D0 DSA1 DSA0 RESVD SPDIF RSVD VRA The Extended Audio ID register is a read-only register except for bits D4 and D5. ID1 and ID0 echo the configuration of the CODEC as defined by the programming of pins 45 and 46 externally. "00" returned defines the CODEC as the primary CODEC, while any other code identifies the CODEC as one of three secondary CODECs. The AMAP bit, D9, will return a 1 indicating that the CODEC supports the optional "AC'97 2.3 Compliant AC-Link Slot to Audio DAC Mappings". The default condition assumes that 00 is loaded in the DSA0 and DSA1 bits of the Extended Audio ID (Index 28h). With 00 in the DSA1 and DSA0 bits, the CODEC slot assignments are as per the AC'97 specification recommendations. If the DSA1 and DSA0 bits do not contain 00, the slot assignments are as per the table in the section describing the Extended Audio ID (Index 28h). The VRA bit, D0, will return a 1 indicating that the CODEC supports the optional variable sample rate conversion as defined by the AC'97 specification. Table 19. Extended Audio ID Register Functions Bit Name Access Reset Value Function 00 = XTAL_OUT grounded (Note Note:) CID1#,CID0# = XTAL_OUT crystal or floating 15:14 ID [1,0] Read only variable 13:12 Reserved Read only 00 Bits not used, should read back 00 11:10 REV[1:0] Read only 10 Indicates CODEC is AC'97 Rev 2.3 compliant 9:6 RSVD Read only 0 Reserved DAC slot assignment 5:4 DSA [1,0] Read/Write 00 If CID[1:0] = 00 then DSA[1:0] resets to 00 If CID[1:0] = 01 then DSA[1:0] resets to 01 If CID[1:0] = 10 then DSA[1:0] resets to 01 If CID[1:0] = 11 then DSA[1:0] resets to 10 00 = left slot 3, right slot 4 01 = left slot 7, right slot 8 10 = left slot 6, right slot 9 11 = left slot 10, right slot 11 3 RSVD Read only 0 Reserved 2 SPDIF Read only 1 0 = SPDIF pulled high on reset, SPDIF disabled 1 = default, SPDIF enabled (Note Note:) 1 RSVD Read only 0 Reserved 0 VRA Read only 1 Variable sample rates supported (Always = 1) Note: 1) External CID pin status (from analog), these bits are the logical inversion of the pin polarity (pin 45-46). These bits are zero if XTAL_OUT is grounded with an alternate external clock source (in primary mode only). Secondary mode can either be through BIT CLK driven or 24 MHz clock driver, with XTAL_OUT floating. Note: 2) If pin 48 is held high at powerup, this bit will be held to zero, to indicate the SPDIF is not available. TO DISABLE SPDIF, USE AN 1 KW - 10 KW EXTERNAL PULLUP RESISTOR. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 61 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.1.20. Extended Audio Control/Status (2Ah) Default: 0400h* (*default depends on CODEC ID) D15 D14 D13 VCFG D12 D11 Reserved D7 D6 Reserved Bit(s) Reset Value D10 D9 SPCV D8 Reserved D5 D4 D3 D2 D1 D0 SPSA1 SPSA0 RSRVD SPDIF RSRVD VRA enable Name Description 15 VCFG Determines the SPDIF transmitter behavior when data is not being transmitted. When asserted, this bit forces the deassertion of the SPDIF "Validity" flag, which is bit 28 transmitted by the SPDIF sub-frame. The "V" bit is defined in the SPDIF Control Register (Reg 3Ah). If "V" = 1 and "VCFG" = 0, then for each S/PDIF sub-frame (Left & Right), bit<28> "Validity" flag reflects whether or not an internal CODEC transmission error has occurred. Specifically an internal CODEC error should result in the "Validity" flag being set to 1. If "V" = 0 and "VCFG" = 1, In the case where the S/PDIF transmitter does not receive a valid sample from the AC'97 controller, (Left or Right), the S/PDIF transmitter should set the "Validity" flag to 0 and pad the "Audio Sample Word" with 0s for sub-frame in question. If a valid sample (Left or Right) was received and successfully transmitted, the "Validity" flag should be 0 for that sub-frame. Default state, coming out of reset, for "V" and "VCFG" should be 0 and 0. These bits are set-able via driver .inf options. 14-11 Reserved Reserved 10 0 SPCV 0 = invalid SPDIF configuration 1 = valid SPDIF configuration 9:6 0 Reserved Bit not used, should read back 0 SPDIF slot assignment 5:4 0 If CID[1:0] = 00 then SPSA[1:0] resets to 01 If CID[1:0] = 01 then SPSA[1:0] resets to 10 If CID[1:0] = 10 then SPSA[1:0] resets to 10 SPSA1:SPSA0 If CID[1:0] = 11 then SPSA[1:0] resets to 11 00 = left slot 3, right slot 4 01 = left slot 7, right slot 8 10 = left slot 6, right slot 9 11 = left slot 10, right slot 11 3 Reserved 2 0 SPDIF 1 0 Reserved 0 0 VRA Enable TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Reserved 0 = disables SPDIF (SPDIF_OUT is high-Z ) (Note 1) 1 = enable SPDIF SPDIF is a control register for Reg 3Ah, this bit must be set low (i.e. SPDIF disabled) in order to write to Reg 3Ah Bits D15, D13:D0. Bit not used, should read back 0 0 = VRA disabled, DAC and ADC set to 48 KHz (Registers 2Ch and 32h loaded with the value BB80h) 1 = VRA enabled, Reg. 2Ch & 32h control sample rate 62 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.1.20.1. Variable Rate Sampling Enable The Extended Audio Status Control register also contains one active bit to enable or disable the Variable Sampling Rate capabilities of the DACs and ADCs. If the VRA bit D0 is 1, the variable sample rate control registers (2Ch and 32h) are active, and "on-demand" slot data required transfers are allowed. If the VRA bit is 0, the DACs and ADCs will operate at the default 48 KHz data rate. The STAC9752A/9753A supports "on-demand" slot request flags. These flags are passed from the CODEC to the AC'97 controller in every audio input frame. Each time a slot request flag is set (active low) in a given audio frame, the controller will pass the next PCM sample for the corresponding slot in the audio frame that immediately follows. The VRA enable bit must be set to 1 to enable "on-demand" data transfers. If the VRA enable bit is not set, the CODEC will default to 48 KHz transfers and every audio frame will include an active slot request flag and data is transferred every frame. For variable sample rate output, the CODEC examines its sample rate control registers, the state of the FIFOs, and the incoming SDATA_OUT tag bits at the beginning of each audio output frame to determine which SLOTREQ bits to set active (low). SLOTREQ bits are asserted during the current audio input frame for active output slots, which will require data in the next audio output frame. For variable sample rate input, the tag bit for each input slot indicates whether valid data is present or not. Thus, even in variable sample rate mode, the CODEC is always the master: for SDATA_IN (CODEC to controller), the CODEC sets the TAG bit; for SDATA_OUT (controller to CODEC), the CODEC sets the SLOTREQ bit and then checks for the TAG bit in the next frame. Whenever VRA is set to 0, the PCM rate registers (2Ch and 32h) are overwritten with BB80h (48 KHz). 7.1.20.2. SPDIF The SPDIF bit in the Extended Audio Status Control Register is used to enable and disable the SPDIF functionality within the STAC9752A/9753A. If the SPDIF is set to a 1, then the function is enabled. When set to a 0, it is disabled. 7.1.20.3. SPCV (SPDIF Configuration Valid) The SPCV bit is read only and indicates whether or not the SPDIF system is set up correctly. When SPCV is a 0, it indicates the system configuration is invalid. When SPCV is a 1, it indicates the system configuration is valid. 7.1.20.4. SPSA1, SPSA0 (SPDIF Slot Assignment) SPSA1 and SPSA0 combine to provide the slot assignments for the SPDIF data. The following details the slot assignment relationship between SPSA1 and SPSA0. The STAC9752A/9753A are AMAP compliant with the following table. Table 20. AMAP compliant CODEC ID 00 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Function 2-ch Primary with SPDIF SPSA = 00 SPSA = 01 SPSA = 10 SPSA = 11 Slot Assignment Slot Assignment Slot Assignment Slot Assignment 3&4 63 7&8* 6&9 10 & 11 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Table 20. AMAP compliant 01 2-ch Dock CODEC with SPDIF 3&4 7&8 6&9* 10 & 11 10 +2-ch Surr w/ SPDIF 3&4 7&8 6&9* 10 & 11 11 +2-ch Cntr/LFE with SPDIF 3&4 7&8 6&9 10 & 11 * Note:* is the default slot assignment 7.1.21. PCM DAC Rate Registers (2Ch and 32h) The internal sample rate for the DACs and ADCs are controlled by the value in these read/write registers that contain a 16-bit unsigned value between 0 and 65535 representing the conversion rate in Hertz (Hz). In VRA mode (register 2Ah, bit D0 = 1), if the value written to these registers is supported, that value will be echoed back when read, otherwise the closest (higher in the case of a tie) sample rate is supported and returned. Per PC 99 / PC 2001 specification, independent sample rates are supported for record and playback. Whenever VRA is set to 0 the PCM rate registers (2Ch and 32h) will be loaded with BB80h (48 KHz). If VRA is set to a 0, any write to this address will be ignored and the rate remains at 48KHz. Table 21. Hardware Supported Sample Rates 7.1.22. Sample Rate SR15-SR0 Value 8 KHz 1F40h 11.025 KHz 2B11h 16 KHz 3E80h 22.05 KHz 5622h 32 KHz 7D00h 44.1 KHz AC44h 48 KHz BB80h PCM DAC Rate (2Ch) Default: BB80h (see table 21: page 64) 7.1.23. D15 D14 D13 D12 D11 D10 D9 D8 SR15 SR14 SR13 SR12 SR11 SR10 SR9 SR8 D7 D6 D5 D4 D3 D2 D1 D0 SR7 SR6 SR5 SR4 SR3 SR2 SR1 SR0 PCM LR ADC Rate (32h) Default: BB80h (see table 21: page 64) D15 D14 D13 D12 D11 D10 D9 D8 SR15 SR14 SR13 SR12 SR11 SR10 SR9 SR8 D7 D6 D5 D4 D3 D2 D1 D0 SR7 SR6 SR5 SR4 SR3 SR2 SR1 SR0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 64 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.1.24. SPDIF Control (3Ah) Default: 2000h D15 D14 D13 D12 D11 D10 D9 D8 V DRS SPSR1 SPSR2 L CC6 CC5 CC4 D7 D6 D5 D4 D3 D2 D1 D0 CC3 CC2 CC1 CC0 PRE COPY /AUDIO PRO Bit(s) Reset Value Access Name Description (note 1-2) V Validity: This bit affects the "Validity" flag, bit<28>, transmitted in each S/PDIF subframe, and enables the S/PDIF transmitter to maintain connection during error or mute conditions. Subframe bit<28> = 0 indicates that data is valid for conversion at the receiver, 1 indicates invalid data (not suitable for conversion at the receiver). 15 in 2.3 If "V" = 1, then each S/PDIF subframe (Left & Right) should have bit<28> "Validity" flag = 1 or set based on the assertion or de-assertion of the AC '97 "VFORCE" bit within the Extended Audio Status and Control Register (D15, register 2Ah). 14 7.2. 0 Read Only DRS 1 = Double Rate SPDIF support (always = 0) 13:12 10 SPDIF Sample Rate. 00 - 44.1 KHz Rate Read & Write SPSR[1,0] 01 - Reserved 10 - 48 KHz Rate (default) 11 - 32 KHz Rate 11 0 Read & Write L 10:4 0 Read & Write CC[6, 0] 3 0 Read & Write PRE 2 0 Read & Write COPY 1 0 Read & Write /AUDIO 0 = PCM data 1 = Non-Audio or non-PCM format 0 0 Read & Write PRO 0 = Consumer use of the channel 1 = Professional use of the channel Generation Level is defined by the IEC standard, or as appropriate. Category Code is defined by the IEC standard or as appropriate by media. 0 = 0 sec Pre-emphasis 1 = Pre-emphasis is 50/15 sec 0 = Copyright not asserted 1 = Copyright is asserted General Purpose Input & Outputs 7.2.1. EAPD EAPD can act as a GPIO, but is unaffected by the following registers. To use EAPD as a GPIO, use Register 74h, the EAPD Access Register. Information about this register is located in Section 7.4.11: page 78. Additional information about EAPD can also be found in Section 7.1.18.3: page 60. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 65 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.2.2. GPIO Pin Definitions GPIO pins are programmable to have input/output functionality. The data values (status) for these pins are all in one register with input/output configuration in a separate register. Control of GPIO pins configured for output is achieved by setting the corresponding bit in output slot 12; status of GPIO pins configured for input is returned on input slot 12. The CODEC must constantly set the GPIO pins that are configured for output, based upon the value of the corresponding bit position of the control slot 12. The CODEC should ignore output slot 12 bits that correspond to GPIO control pins configured as inputs. The CODEC must constantly update status on input slot 12, based upon the logic level detected at each GPIO pin configured for input. A GPIO output pin value that is written via slot 12 in the current frame won't affect the GPIO status that is returned in that particular write frame. This slot-12 based control/status protocol minimizes the latency and complexity, especially for host-based Controllers and host data pump software, and provides high speed monitoring and control, above what could be achieved with command/status slots. For host-based implementations, most AC`97 registers can be shadowed by the driver in order to provide immediate response when read by the processor, and GPIO pins configured as inputs should be capable of triggering an interrupt upon a change of status. The AC-Link request for GPIO pin status is always delayed by at least one frame time. Read-Modify-Writes across the AC-Link will thus incur latency issues and must be accounted for by the software driver or AC`97 Digital Controller firmware. PCI re-tries should be kept to a minimum wherever possible. 7.2.3. GPIO Pin Implementation The GPIOs are set to a high impedance state on power-on or a cold reset. It is up to the AC`97 Digital Controller to first enable the output after setting it to the desired state. 7.2.4. Extended Modem Status and Control Register (3Eh) Default: 0100h D15 D14 D13 D7 D6 D5 D12 D11 D10 D9 D3 D2 D1 PRA Reserved D4 Reserved Bit(s) Access Reset Value Name 15:9 Read Only 0 Reserved 8 Read / Write 1 PRA 7:1 Read Only 0 Reserved 0 Read Only 0 GPIO TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 66 D8 D0 GPIO Description Bit not used, should read back 0 0 = GPIO powered up / enabled 1 = GPIO powered down / disabled Bit not used, should read back 0 0 = GPIO not ready (powered down) 1 = GPIO ready (powered up) V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.2.5. GPIO Pin Configuration Register (4Ch) Default: 0003h D15 D14 D13 D12 D11 D10 D3 D2 D9 D8 Reserved D7 D6 D5 D4 Reserved D1 D0 GC1 (GPIO1) GC0 (GPIO0) Bit(s) Access Reset Value Name 15:2 Read Only 0 Reserved Bit not used, should read back 0 1 Read / Write 1 GC1 0 = GPIO1 configured as output 1 = GPIO1 configured as input 0 Read / Write 1 GC0 0 = GPIO0 configured as output 1 = GPIO0 configured as input 7.2.6. Description GPIO Pin Polarity/Type Register (4Eh) Default: FFFFh D15 D14 D13 D12 D11 D10 D3 D2 D9 D8 Reserved D7 D6 D5 D4 Reserved D0 GP0 (GPIO0) Bit(s) Access Reset Value 15:2 Read Only 0 1 Read / Write 1 GP1 0 = GPIO1 Input Polarity Inverted, CMOS output drive. 1 = GPIO1 Input Polarity Non-inverted, Open-Drain output drive. 0 Read / Write 1 GP0 0 = GPIO0 Input Polarity Inverted, CMOS output drive. 1 = GPIO0 Input Polarity Non-inverted, Open-Drain output drive. 7.2.7. Name D1 GP1 (GPIO1) Description Reserved Bit not used, should read back 0 GPIO Pin Sticky Register (50h) Default: 0000h D15 D14 D13 D12 D11 D10 D9 D8 D1 D0 Reserved D7 D6 D5 D4 Reserved D3 D2 GS1 (GPIO1) GS0 (GPIO0) Bit(s) Access Reset Value Name 15:2 Read Only 0 Reserved 1 Read / Write 0 GS1 0 = GPIO1 Non Sticky configuration. 1 = GPIO1 Sticky configuration. 0 Read / Write 0 GS0 0 = GPIO0 Non Sticky configuration. 1 = GPIO0 Sticky configuration. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 67 Description Bit not used, should read back 0 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.2.8. GPIO Pin Mask Register (52h) Default: 0000h D15 D14 D13 D12 D11 D10 D9 D8 D1 D0 Reserved D7 D6 D5 D4 D3 D2 Reserved GW1 (GPIO1) GW0 (GPIO0) Bit(s) Access Reset Value Name 15:2 Read Only 0 Reserved 1 Read / Write 0 GW1 0 = GPIO1 interrupt not passed to GPIO_INT slot 12. 1 = GPIO1 interrupt is passed to GPIO_INT slot 12. 0 Read / Write 0 GW0 0 = GPIO0 interrupt not passed to GPIO_INT slot 12. 1 = GPIO0 interrupt is passed to GPIO_INT slot 12. 7.2.9. Description Bit not used, should read back 0 GPIO Pin Status Register (54h) Default: 0000h D15 D14 D13 D12 D7 D6 D5 D4 D11 D10 D9 D8 Reserved D3 D2 Reserved Bit(s) Access 15:2 Read Only 1 0 7.3. Read / Write Read / Write Reset Name Value 0 x x D1 D0 GI1 (GPIO1) GI0 (GPIO0) Description Rsvd Bit not used, should read back 0 GI1 When GPIO1 is configured as output and Register h74 bit[0] = 0 (default), the value of this register will be placed on the GPIO1 pad. When GPIO1 is configured as output and Register h74 bit[0] = 1, the GPIO1 pad will get its value from slot12. When GPIO1 is configured as input and configured as a sticky writing a 1 does nothing, writing a 0 clears this bit. When GPIO1 is configured as input this register reflects the value on the GPIO1 pad after interpretation of the polarity and sticky configurations. GI0 When GPIO0 is configured as output and Register h74 bit[0] = 0 (default), the value of this register will be placed on the GPIO0 pad. When GPIO0 is configured as output and Register h74 bit[0] = 1, the GPIO0 pad will get its value from slot12. When GPIO0 is configured as input and configured as a sticky writing a 1 does nothing, writing a 0 clears this bit. When GPIO0 is configured as input this register reflects the value on the GPIO0 pad after interpretation of the polarity and sticky configurations. Extended CODEC Registers Page Structure Definition Registers 60h-68h are the Extended CODEC Registers: These registers allow for the definition of further capabilities. These bits provide a paged address space for extended CODEC information. The Page Selector bits in the Audio Interrupt and Paging register (Register 24h bits 3:0) control the page of information viewed through this page window. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 68 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.3.1. Extended Registers Page 00 Page 00 of the Extended CODEC Registers is reserved for vendor specific use. Driver writers should not access these registers unless the Vendor ID register has been checked first to ensure that the vendor of the AC '97 component has been identified and the usage of the vendor defined registers understood. 7.3.2. Extended Registers Page 01 The usage of Page 01 of the Extended CODEC Registers is defined in Register 24h found in Section 7.1.17: page 58. 7.3.3. Extended Registers Page 02, 03 Pages 02 and 03 of the Extended CODEC Registers are reserved for future use. 7.4. STAC9752A/9753A Paging Registers The AC'97 Specification Rev 2.3 uses a paging mechanism in order to increase the number of registers. The registers currently used in the paging are 60h to 6Eh. Additional information about the Extended CODEC Registers, please refer to Section 7.3: page 68. One of two pages can be made active at any time, set in Register 24h. Register 24h is the Audio Interrupt and Paging Register. Additional details about Register 24h is located in Section 7.1.17: page 58. If page 00h is active, registers 60h to 6Eh are Vendor Specific. If page 01h is active, registers 60h to 6Eh have the following functionality: Reg NAME 60h CODEC Class/Revision FUNCTION Location Provides the CODEC Class and a Vendor specified revision identifier. 7.4.1: page 69 62h PCI SVID Allows for population by the system BIOS to identify the PCI Sub System Vendor ID. 7.4.2: page 70 64h PCI SSID Allows for population by the system BIOS to identify the PCI Sub System ID. Note:: page 70 66h Function Select Provides the type of audio function being selected and which jack conductor the selected value is measured from. Note:: page 71 68h Function Information Includes information about Gain, Inversion, Buffer delays, Information Validity, and Function Information presence. 7.4.5: page 72 6Ah Sense Register Includes information about the connector/jack location, Input verses Output sensing, the Order of the sense results, and the TSI specific sense results. 7.4.7: page 74 6Ch Reserved 6Eh Reserved 7.4.1. CODEC Class/Rev (60h Page 01h) Register 24h must be set to Page 01h to access this register. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 69 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Default: 12xxh D15 D14 D13 Reserved D12 D11 D10 D9 D8 CL4 CL3 CL2 CL1 CL0 D7 D6 D5 D4 D3 D2 D1 D0 RV7 RV6 RV5 RV4 RV3 RV2 RV1 RV0 Bit(s) Reset Value Name 15-13 12-8 7-0 7.4.2. Description Reserved Reserved -NOT DEFINED CL4:CL0 CODEC Compatibility Class (RO) This is a CODEC vendor specific field to define software compatibility for the CODEC. Software reads this field, together with CODEC vendor ID (reg 7C-7Eh), to determine vendor specific programming interface compatibility. Software can rely on vendor specific register behavior to be compatible among vendor CODECs of the same class. 00h - Field not implemented 01h-1Fh - Vendor specific compatibility class code Equals Vendor ID2(Reg 7Eh) bits D7 to D0 RV7:RV0 Revision ID: (RO) This register specifies a device specific revision identifier. The value is chosen by the vendor. Zero is an acceptable value. This field should be viewed as a vendor defined extension to the CODEC ID. This number changes with new CODEC stepping of the same CODEC ID. PCI SVID (62h Page 01h) Register 24h must be set to Page 01h to access this register. Default: FFFFh D15 D14 D13 D12 D11 D10 D9 D8 PVI15 PVI14 PVI13 PVI12 PVI11 PVI10 PVI9 PVI8 D7 D6 D5 D4 D3 D2 D1 D0 PVI7 PVI6 PVI5 PVI4 PVI3 PVI2 PVI1 PVI0 Bit(s) Reset Value Name Description PCI Sub System Vendor ID: This field provides the PCI Sub System Vendor ID of the Audio or Modem Sub PVI15:PVI0 Assembly Vendor (i.e., CNR manufacturer, Motherboard Vendor). This is NOT the CODEC vendor PCI Vendor ID, nor the AC '97 controller PCI Vendor ID. If data is not available, returns FFFFh. 15-0 Note: This register is populated by the BIOS and does not reset on RESET#. 7.4.3. PCI SSID (64h Page 01h) Register 24h must be set to Page 01h to access this register. Default: FFFFh D15 D14 D13 D12 D11 D10 D9 D8 PI15 PI14 PI13 PI12 PI11 PI10 PI9 PI8 D7 D6 D5 D4 D3 D2 D1 D0 PI7 PI6 PI5 PI4 PI3 PI2 PI1 PI0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 70 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name Description PCI Sub System ID: This field provides the PCI Sub System ID of the Audio or Modem Sub Assembly (i.e., CNR Model, Motherboard SKU). This is NOT the CODEC vendor PCI ID, nor PI15:PVI0 the AC '97 controller PCI ID. Information in this field must be available for AC '97 controller reads when CODEC ready is asserted in AC link.If data is not available, returns FFFFh. 15-0 Note: This register is populated by the BIOS and does not reset on RESET#. 7.4.4. Function Select (66h Page 01h) Register 24h must be set to Page 01h to access this register. Default: 0000h D15 D14 D13 D12 D11 D10 D9 D8 D4 D3 D2 D1 D0 FC3 FC2 FC1 FC0 T/R Reserved D7 D6 D5 Reserved Bit(s) Reset Value 15-5 4-1 Name Description Reserved Reserved 00h Function Code bits: 00h - Line Out (Master Out) 01h - Head Phone Out (AUX Out) Setting the T/R bit to 0 = Left, 1 = Right 02h - DAC 3 (C/LFE) - Not Supported 03h - SPDIF out 04h - Phone In 05h - Mic1 (Mic select = 0) 06h - Mic2 (Mic select = 1) 07h - Line In 08h - CD In 09h - Video In FC3:FC0 0Ah - Aux In 0Bh - Mono Out 0C-0Fh - Reserved For supported Jack and Mic Sense Functions, see Table 22: page 72. The Function Code Bits are used to read Register 68h (Page 01h) and Register 6Ah (Page 01h). Mono I/O should report relevant sense and function information on Tip, and report not supported on Ring. Setting the function code to unsupported values will return a 0 when accessing the Information Valid Bit in page 01 register 68h bit 5. 0 0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. T/R Tip or Ring selection Bit.This bit sets which jack conductor the sense value is measured from. Software will program the corresponding the Ring/Tip selector bit together with the I/O number in bits FC[3:0]. 0 - Tip (Left) 1 - Ring (Right) 71 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Note: This register does not reset on RESET#. Table 22. Supported Jack and Mic Sense Functions Function Code I/O Sense Capability 00h Line_Out Jack Sense 01h Headphone_Out Jack Sense 05h Mic1 Mic Sense 06h Mic2 Mic Sense 7.4.5. Function Information (68h Page 01h) Register 24h must be set to Page 01h to access this register. Default: 00xxh, see table 23: page 73. D15 D14 D13 D12 D11 D10 D9 D8 G4 G3 G2 G1 G0 INV DL4 DL3 D3 D2 D1 D7 D6 D5 D4 DL2 DL1 DL0 IV Bit(s) Reset Value 15 14-11 0 0 10 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Name G4 Reserved D0 FIP Description Gain Sign Bit: The CODEC updates this bit with the sign of the gain value present in G[3:0]. The BIOS updates this to take into consideration external amplifiers or other external logic when relevant. G[4] indicates whether the value is a gain or attenuation. Gain in the G4 bit is in terms of dB. This bit is Read/Write and only reset on POR and not by RESET#. G3:G0 Gain Bits: The CODEC updates these bits with the gain value (dB relative to level-out) in 1.5dBV increments. The BIOS updates these to take into consideration external amplifiers or other external logic when relevant. G[0:3] indicates the magnitude of the gain. G[4] indicates whether the value is a gain or attenuation. For Gain/Attenuation settings, see Table 24: page 73. These bits are read/write and are not reset on RESET#. INV Inversion bit: Indicates that the CODEC presents a 180 degree phase shift to the signal. 0h - No inversion reported 1h - Inverted This bit is read/write and is not reset on RESET#. BIOS should invert for each inverting gain stage. 72 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value 9-5 Name Description DL4:DL0 Buffer delays: CODEC will provide number a delay measurement for the input and output channels. Software will use this value to accurately calculate audio stream position with respect to what is been reproduced or recorded. These values are in 20.83 sec (1/48000 second) units. For output channels, this timing is from the end of AC Link frame in which the sample is provided, until the time the analog signal appears at the output pin. For input streams, this is from when the analog signal is presented at the pin until the representative sample is provided on the AC Link. Analog in and out paths are not considered as part of this delay. The measurement is a 'typical' measurement, at a 48 KHz sample rate, with minimal in-CODEC processing (i.e., 3D effects are turned off.) 00h - Information not provided 01h...1Eh - Buffer delay in 20.83 sec units 1Fh - reserved These bits are read/write and are not reset on RESET#. The default value is the delay internal to the CODEC. The BIOS may add to this value the known delays external to the CODEC, such as for an external amplifier. Information Valid Bit: Indicates whether a sensing method is provided by the CODEC and if information field is valid. This field is updated by the CODEC. 0h--After CODEC RESET# de-assertion, it indicates the CODEC does NOT provides sensing logic and this bit will be Read Only. After a sense cycle is completed indicates that no information is provided on the sensing method. 1h--After CODEC RESET# de-assertion, it indicates the CODEC provides sensing logic for this I/O and this bit is Read/Write. After clearing this bit by writing1, when a sense cycle is completed the assertion of this bit indicates that there is valid information in the remaining descriptor bits. Writing 0 to this bit has no effect. BIOS should NOT write this bit, as it is reset on RESET#. 4 1 IV 3-1 0 Reserved 0 NA Bit not used, should read back 0 Function Information Present This bit is set to a 1 indicates that the G[4:0], INV, DL[4:0](Register 68h, Page 01h) and ST[2:0](register 6Ah, Page 01h) are supported and R/W capable. This bit is Read Only. FIP Table 23. Reg 68h Default Values Reg 66h Function Code Reg 68h Default Value 00h Line Out 0010h 01h Headphone Out 0010h 05h Mic1 0010h 06h Mic2 0010h All other Function Codes 0000h For RESET#: Reg 68h default value is 0000h. Table 24. Gain or Attenuation Examples G[4:0] Gain or Attenuation (dB relative to level-out) 00000 0 dBV 00001 +1.5 dBV 01111 +24 dBV 10001 -1.5 dBV 11111 -24 dBV TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 73 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Table 25. Register 68h/Page 01h Bit Overview 7.4.6. Bit Bit R/W Overview D5:D15 Read/Write and only reset on POR (Power on Reset) and not by RESET#. D4 Read/Write and should NOT be set by the BIOS D3:1 Reserved D0 Read Only. Digital Audio Control (6Ah, Page 00h) To access Register 6Ah, Page 00h must be selected in Register 24h. Default: 0000h D15 D14 D13 D12 D11 D10 D9 D8 D3 D2 D1 D0 SPOR DO1 RSVD Reserved D7 D6 D5 D4 Reserved Bit(s) Reset Value Name 15:3 0 Reserved 2 0 SPOR 1 0 DO1 0 0 Reserved 7.4.7. Description Bits not used, should read back 0 Over-ride Register 2Ah, D12 write-lock when SPDIF_EN = 1. All bits except SPDIF sample-rate are affected (D13-D12). Allows for sub-code changing on-the-fly. SPDIF Digital Output Source Selection: DO1 = 0; PCM data from the AC-Link to SPDIF DO1 = 1; ADC record data to SPDIF Bits not used, should read back 0 Sense Details (6Ah Page 01h) Register 24h must be set to Page 01h to access this register. Default: NA D15 D14 D13 ST2 ST1 ST0 S4 S3 S2 S1 S0 D7 D6 D5 D4 D3 D2 D1 D0 OR1 OR0 SR5 SR4 SR3 SR2 SR1 SR1 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. D12 74 D11 D10 D9 D8 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value Name Description Connector/Jack location bits This field describes the location of the jack in the system. 0h - Rear I/O Panel 1h - Front Panel ST2:ST0 2h - Motherboard 3h - Dock/External 4h:6h - Reserved 7h - No Connection/unused I/O These bits are Read/Write. 15-13 12-8 7-6 S4:S0 Sensed bits meaning relates to the I/O being sense as output or inputs. Sensed bits (outputs): See Table 26: page 75. This field allows for the reporting of the type of output peripheral/device plugged in the jack. Values specified below should be interrogated in conjunction with the SR[5:0] and OR[1:0] bits for accurate reporting. Sensed bits (inputs): See Table 27: page 76. This field allows for the reporting of the type of input peripheral/device plugged in the jack. Values specified below should be interrogated in conjunction with the SR[5:0] and OR[1:0] bits for accurate reporting. This field is Read Only. OR1:0 Order Bits. These bits indicate the order the sense result bits SR[5:0] are using. 00 - 100 (i.e., Ohms) 01 - 101 (i.e., 10 Ohms) 10 - 102 (i.e., 100 Ohms) 11 - 103 (i.e., 1K Ohms) Sense Result bits 5-0 SR5:SR0 These bits are used to report a vendor specific fingerprint or value. (Resistance, impedance, reactance, ect). This field is Read Only. Table 26. Sensed Bits (Outputs) Reported Value Output Peripheral/Device 0h Data not valid. Indicates that the reported value(s) is invalid. 1h No connection. Indicates that there are no connected devices. 2h Fingerprint. Indicates a specific fingerprint value for devices that are not specified or unknown. 3h Speakers (8 ohms) 4h Speakers (4 ohms) 5h Powered Speakers 6h Stereo Headphone 7h Reserved 8h Reserved 9h Headset (mono speaker left channel and mic.) Ah Other. Allows a vendor to report sensing other type of devices/peripherals. SR[5:0] together with OR[1:0] provide information regarding the type of device sensed. Bh-Eh Reserved Fh Unknown (use fingerprint) TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 75 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Table 27. Sensed Bits (Inputs) Reported Value Input Peripheral/Device 0h Data not valid. Indicates that the reported value(s) is invalid. 1h No connection. Indicates that there are no connected devices. 2h Fingerprint. Indicates a specific fingerprint value for devices that are not specified. 3h Microphone (mono) 7.4.8. 4h Reserved 5h Stereo Line In (CE device attached) 6h Reserved 7h Reserved 8h Reserved 9h Headset (mono speaker left channel and mic.) Ah Other. Allows a vendor to report sensing other type of devices/peripherals. SR[5:0] together with OR[1:0] provide information regarding the type of device sensed. Bh-Eh Reserved Fh Unknown (use fingerprint) Revision Code (6Ch) To access Register 6Ch, Page 00h must be selected in Register 24h. Default: xxxxh D15 D14 D13 D12 D11 D10 D9 D8 D2 D1 D0 MINORREV D7 D6 D5 D4 D3 MAJORREV Bit(s) Reset Value Name Description 15:8 00h MINORREV Minor Revision ID. These bits are read only and will be updated based on minor device changes which will not require software changes. 7:0 xx MAJORREV Major Revision ID. These bits are read only and will be updated based on major device changes. 7.4.9. Analog Special (6Eh) To access Register 6Eh, Page 00h must be selected in Register 24h. Default: 1000h D15 D14 D13 Reserved D12 D11 D7 D6 D5 D4 RSVD MUTEFIX DISABLE ADCSLT1 ADCSLT0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. D10 AC97MIX D3 76 D9 D8 Reserved D2 RSVD MIC GAIN VAL D1 D0 SPLYOVR EN SPLYOVR VAL V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value 15:13 Name 0 Description Reserved Bits not used, should read back 0 12 1 AC97MIX 0 = mixer record contains a mix of all mono and stereo analog input signals, not the DAC (ALL ANALOG mode) 1 = mixer record contains a mix of all mono and stereo analog input signals plus the DAC signal (AC97 mode) This bit only has an effect when either Stereo Mix or Mono Mix is selected as the record source in Reg. 1Ah. The "ALL" mode is useful in conjunction with the POP BYPASS mode (Reg. 20h;D15) to record all analog sources, perform further processing in the digital domain, including combining with other PCM data, and routing through the DACs directly to Line Out, Headphone Out, or Mono Out. A Stereo Mix recording will be affected by the setting of the 3D Effects bit (Reg. 20h;D13) 11:7 0 Reserved Bits not used, should read back 0 MUTEFIX DISABLE 0 = MUTE FIX Enabled 1 = MUTE FIX Disabled When this bit is zero, and either channel is set to -46.5dB attenuation, 1Fh, then that channel is fully muted. When this bit is one, then operation is per AC'97 specification. 6 0 5:4 0 ADCSLT1:0 3 0 Reserved 2 Select slots for ADC data on ACLINK 00 = left slot 3, right slot 4 01 = left slot 7, right slot 8 10 = left slot 6, right slot 9 11 = left slot 10, right slot 11 Reserved Adds +10dB gain to the selected MIC input. Use in conjunction with BOOSTEN (Reg. 0Eh;D6) BOOSTEN MICGAINVAL 0 0 = 0 dB MIC GAIN VAL 0 1 = 10 dB 1 0 = 20 dB 1 1 = 30 dB 0 Supply Override bit allows override of the supply detect. 1 0 SPLYOVR_EN 0 = no override on supply detect 1 = override supply detect with bit 0 Supply Override Value provides the analog voltage operation values. 0 7.4.10. 0 SPLYOVR_VAL 0 = force 3.3 V operation 1 = force 5 V operation Analog Current Adjust (72h) To unlock Register 72h, write 0xABBA to Register 70h. Default: 0000h D15 D14 D13 D12 D11 D10 D9 D8 D3 D2 D1 D0 Reserved D7 D6 D5 D4 INT APOP TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Reserved 77 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) Reset Value 15:8 0 7 0 6:0 0 7.4.11. Name Description Reserved Reserved 0 = Anti Pop Enabled 1 = Anti Pop Disabled The STAC9752A/9753A includes an internal power supply anti-pop circuit that prevents audible clicks and pops from being heard when the CODEC is powered on and off. This function is accomplished by delaying the charge/discharge of the VREF capacitor (Pin 27). CVREF value of 1 F will cause a turn-on delay of INT_APOP roughly 3 seconds, which will allow the power supplies to stabilize before the CODEC outputs are enabled. The delay will be extended to 30 seconds if a value of CVREF value of 10 F is used. The CODEC outputs are also kept stable for the same amount of time at power-off to allow the system to be gracefully turned off. The INT_APOP bit allows this delay circuit to be bypassed for rapid production testing. Any external component anti-pop circuit is unaffected by the internal circuit. Reserved Reserved EAPD Access Register (74h) Default: 0800h D15 D14 D13 EAPD D12 Reserved D7 D6 D5 D11 D10 EAPD_OEN D4 D3 Reserved Bit(s) Reset Value Name 15 0 EAPD 14:12 0 Reserved 11 1 10:3 0 D9 D8 Reserved D2 D1 D0 INTDIS GPIOACC GPIOSLT12 Description EAPD data Enable EAPD data output on EAPD when bit D11 = 1 EAPD data input from pin when bit D11 = 0 Bit not used, should read back 0 EAPD Pin Enable EAPD_OEN 0 = EAPD configured as input pin 1 = EAPD configured as output pin Reserved Bit not used, should read back 0 Interrupt disable option. Interrupts cleared by writing a 1 to I4 (Reg24h:D15) 2 0 INTDIS 1 0 GPIOACC 0 0 0 = will clear both SENSE and GPIO interrupts 1 = will only clear SENSE interrupts. GPIO interrupts will have to be cleared in Reg54h. GPIO ACCESS 0 = ACLINK access from GPIO Pads 1 = ACLINK access from GPIO Register 54h 0 = GPIO0/1 access via Reg54h when GPIO is set as an output, for input Slot 12 data will be 0h. 1 = GPIO0/1 access via Slot 12 when GPIO is set as an output, for inputs GPIOSLT12 Reg54h will not be updated. This can only be used if a modem CODEC is not present in the system and using Slot 12. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 78 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 7.4.12. Register 78h Enable (76h) Default: 0000h D15 D14 D13 D12 D11 D10 D9 D8 EN15 EN14 EN13 EN12 EN11 EN10 EN9 EN8 D7 D6 D5 D4 D3 D2 D1 D0 EN7 EN6 EN5 EN4 EN3 EN2 EN1 EN0 D9 Universal JacksTM Selection (78h) 7.4.13. To unlock Register 78h, write 0xABBA to Register 76h. Default: 0000h D15 D14 D13 HP SEL D7 D6 STMIC SEL Bit(s) 15:14 D5 MSPWDN Reset Value 00 D12 LO SEL D11 D10 RSVD LI SEL D3 D2 D4 HP3dB DACBYHP DACBYLO Name HP SEL Line Out Selection 00 - LO on pins 35/36 (default) 01 - LO on pins 23/24 10 - Off 11 - Off 13:12 00 LO SEL 11 0 RSVD Reserved 10 00 LI SEL Line In Selection 0 - LI on pins 23/24 (default) 1 - LI on pins 35/36 00 MIC SEL 7 0 STMIC SEL 6 0 MSPWDN 5 0 HP3dB TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. D1 D0 Reserved ADC HPF BYP Description Headphone Amp Selection 00 - HP on pins 39/41 (default) 01 - HP on pins 35/36 10 - Off 11 - Off 9:8 Reserved D8 MIC SEL Microphone Selection 00 - MIC on pins 21/22 (default) 01 - MIC on pins 23/24 10 - MIC on pins 35/36 11 - MIC on pins 39/41 Stereo MIC Select 0 - Mono MIC 1 - Stereo MIC MIC Sense Power Down 0 - On 1 - Off Headphone 3dB 0 - Off 1 - On 79 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Bit(s) 4 7.5. Reset Value Name 0 Description DACBYPHP Independent DAC bypass for HP Volume (Reg 04h) This can be over ridden by Reg 20h D15, pop bypass 0 - Off 1 - On Independent DAC bypass for LO Volume (Reg 02h) This can be over ridden by Reg 20h D15, pop bypass 0 - Off 1 - On 3 0 DACBYPLO 2 0 Reserved Reserved 1 0 Reserved Reserved 0 0 ADC HPF BYP 0 = Normal operation, (ADC High Pass Filter active) 1 = ADC High Pass Filter Bypass Vendor ID1 and ID2 (Index 7Ch and 7Eh) These two registers contain four 8-bit ID codes. The first three codes have been assigned by Microsoft using their Plug and Play Vendor ID methodology. The fourth code is a TSI assigned code identifying the STAC9752A/9753A. The ID1 register (index 7Ch) contains the value 8384h, which is the first (83h) and second (84h) bytes of the Microsoft ID code. The ID2 register (index 7Eh) contains the value 7652h, which is the third (76h) byte of the Microsoft ID code, and 52h which is the STAC9752A/9753A ID code. 7.5.1. Vendor ID1 (7Ch) Default: 8384h D15 7.5.2. D14 D13 D12 D11 D10 D9 D8 1 0 0 0 0 0 1 1 D7 D6 D5 D4 D3 D2 D1 D0 1 0 0 0 0 1 0 0 Vendor ID2 (7Eh) Default: 7652h D15 D14 D13 D12 D11 D10 D9 D8 0 1 1 1 0 1 1 0 D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 1 0 0 1 0 TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 80 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 8. LOW POWER MODES The STAC9752A/9753A is capable of operating at reduced power when no activity is required. The state of power down is controlled by the Powerdown Register (26h). There are seven separate commands of power down. The power down options are listed in Table 28. The first three bits, PR0..PR2, can be used individually or in combination with each other, and control power distribution to the ADCs, DACs and Mixer. The last analog power control bit, PR3, affects analog bias and reference voltages, and can only be used in combination with PR1, PR2, and PR3. PR3 essentially removes power from all analog sections of the CODEC, and is generally only asserted when the CODEC will not be needed for long periods. PR0 and PR1 control the PCM ADCs and DACs only. PR2 and PR3 do not need to be "set" before a PR4, but PR0 and PR1 should be "set" before PR4. PR5 disables the DSP clock and does not require an external cold reset for recovery. PR6 disables the headphone driver amplifier for additional analog power saving. Table 28. Low Power Modes GRP Bits Function PR0 PCM in ADCs & Input Mux Powerdown PR1 PCM out DACs Powerdown PR2 Analog Mixer powerdown (VREF still on) PR3 Analog Mixer powerdown (VREF off) PR4 Digital Interface (AC-Link) powerdown (BIT CLK forced low) PR5 Digital Clock disable, BIT CLK still on PR6 Powerdown HEADPHONE_OUT Figure 22. Example of STAC9752A/9753A Powerdown/Powerup Flow PR0=1 Normal PR1=1 ADCs off PR0 PR0=0 & ADC=1 Ready =1 PR2=1 DACs off PR1 PR1=0 & DAC=1 PR4=1 Analog off PR2 or PR3 PR2=0 & ANL=1 Default Digital I/F off PR4 Shut off AC-Link Warm Reset Cold Reset The Figure 22 illustrates one example procedure to do a complete powerdown of STAC9752A/9753A. From normal operation, sequential writes to the Powerdown Register are performed to power down STAC9752A/9753A a section at a time. After everything has been shut off, a final write (of PR4) can be executed to shut down the AC-Link. The part will remain in sleep mode with all its registers holding their static values. To wake up, the AC'97 Controller will send an extended pulse on the sync line, issuing a warm reset. This will restart the AC-Link (resetting PR4 to zero). The STAC9752A/9753A can also be woken up with a cold reset. A cold reset will reset all of the registers to their default states (Paged Registers are semi-exempt). When a section is powered back on, the Powerdown Control/Status register (index 26h) should be read to verify that the section is ready (stable) before attempting any operation that requires it. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 81 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Figure 23. Powerdown/Powerup Flow With Analog Still Alive PR0=1 PR1=1 PR4=1 Normal ADCs off PR0 PR0=0 & ADC=1 DACs off PR1 PR1=0 & DAC=1 Digital I/F off PR4 Shut off AC-Link Warm Reset Figure 23 illustrates a state when all the mixers should work with the static volume settings that are contained in their associated registers. This configuration can be used when playing a CD (or external LINE_IN source) through the STAC9752A/9753A to the speakers, while most of the system in low power mode. The procedure for this follows the previous example, except that the analog mixer is never shut down. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 82 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 9. MULTIPLE CODEC SUPPORT The STAC9752A/9753A provides support for the multi-CODEC option according to the Intel AC'97, rev 2.3 specification. By definition there can be only one Primary CODEC (CODEC ID 00) and up to three Secondary CODECs (CODEC IDs 01,10, and 11). The CODEC ID functions as a chip select. Secondary devices therefore have completely orthogonal register sets; each is individually accessible and they do not share registers. 9.1. Primary/Secondary CODEC Selection In a multi-CODEC environment the CODEC ID is provided by external programming of pins 45 and 46 (CID0 and CID1). The CID pin electrical function is logically inverted from the CODEC ID designation. The corresponding pin state and its associated CODEC ID are listed in the "CODEC ID Selection" table. Also see slot assignment discussion, "Multi-Channel Programming Register (Index 74)". Table 29. CODEC ID Selection 9.1.1. CID1 State CID0 State CODEC ID CODEC Status DVdd or floating DVdd or floating 00 Primary DVdd or floating 0V 01 Secondary 0V DVdd or floating 10 Secondary 0V 0V 11 Secondary Primary CODEC Operation As a Primary device the STAC9752A/9753A is completely compatible with existing AC'97 definitions and extensions. Primary CODEC registers are accessed exactly as defined in the AC'97 Component Specification and AC'97 Extensions. The STAC9752A/9753A operates as Primary by default, and the external ID pins (45 and 46), have internal pull-ups so that these pins may be left as no-connects for primary operation. When used as the Primary CODEC, the STAC9752A/9753A generates the master AC-Link BIT_CLK for both the AC'97 Digital Controller and any Secondary CODECs. The STAC9752A/9753Acan support up to four, 10 KW / 50 pF loads on the BIT_CLK output. This is to ensure that up to four CODEC implementations will not load down the clock output. 9.1.2. Secondary CODEC Operation When the STAC9752A/9753A is configured as a Secondary device the BIT_CLK pin is configured as an input at power up. Using the BIT_CLK provided by the Primary CODEC insures that everything on the AC-Link will be synchronous. As a Secondary device, it can be defined as CODEC ID 01, 10, or 11 in the two-bit field(s) of the Extended Audio and/or Extended Modem ID Register(s). 9.2. Secondary CODEC Register Access Definitions The AC'97 Digital Controller can independently access Primary and Secondary CODEC registers by using a 2-bit CODEC ID field (chip select) which is defined as the LSBs of Output Slot 0. For Secondary CODEC access, the AC'97 Digital Controller must invalidate the tag bits for Slot 1 and 2 Command Address and Data (Slot 0, bits 14 and 13) and place a non-zero value (01, 10, or 11) into the CODEC ID field (Slot 0, bits 1 and 0). TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 83 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack As a Secondary CODEC, the STAC9752A/9753A will disregard the Command Address and Command Data (Slot 0, bits 14 and 13) tag bits unless it sees a 2-bit CODEC ID value (Slot 0, bits 1 and 0) that matches its configuration. In a sense the Secondary CODEC ID field functions as an alternative Valid Command Address (for Secondary reads and writes) and Command Data (for Secondary writes) tag indicator. Secondary CODECs must monitor the Frame Valid bit, and ignore the frame (regardless of the state of the Secondary CODEC ID bits) if it is not valid. AC'97 Digital Controllers should set the frame valid bit for a frame with a secondary register access, even if no other bits in the output tag slot except the Secondary CODEC ID bits are set. This method is designed to be backward compatible with existing AC'97 controllers and CODECs. There is no change to output Slot 1 or 2 definitions. Table 30. Secondary CODEC Register Access Slot 0 Bit Definitions Output Tag Slot (16-bits) Bit 15 Description Frame Valid 14 Slot 1 Valid Command Address bit (Primary CODEC only) 13 Slot 2 Valid Command Data bit (Primary CODEC only) 12-3 2 Slot 3-12 Valid bits as defined by AC'97 Reserved (Set to "0") 1-0 2-bit CODEC ID field (00 reserved for Primary; 01, 10, 11 indicate Secondary) Note: New definitions for Secondary CODEC Register Access Using three CODECs typically requires a controller to support SDATA_IN2. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 84 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 10. TESTABILITY The STAC9752A/9753A has two test modes. One is for ATE in-circuit test and the other is restricted for TSI's internal use. STAC9752A/9753A enters the ATE in-circuit test mode if SDATA_OUT is sampled high at the trailing edge of RESET#. Once in the ATE test mode, the digital AC-Link outputs (BIT_CLK and SDATA_IN) are driven to a high impedance state. This allows ATE in-circuit testing of the AC'97 controller. Use of the ATE test mode is the recommended means of removing the CODEC from the AC-Link when another CODEC is to be used as the primary. This case will never occur during standard operating conditions. Once either of the two test modes have been entered, the STAC9752A/9753A must be issued another RESET# with all AC-Link signals held low to return to the normal operating mode. Table 31. Test Mode Activation SYNC SDATA_OUT Description 0 0 Normal AC '97 operation 0 1 ATE Test Mode 1 0 TSI Internal Test Mode 1 1 Reserved 10.1. ATE Test Mode ATE test mode allows for in-circuit testing to be completed at board level. For this to work, the outputs of the device must be driven to a high impedance state (Z). Internal pullups for digital I/O pins must be disabled in this mode. This mode initiates on the rising edge of RESET# pin. Only a cold reset will exit the ATE Test Mode. Table 32. ATE Test Mode Operation Pin Name Pin # Function Description SDATA_OUT 5 1 BIT_CLK 6 Z SDATA_IN 8 Z SYNC 10 0 RESET# 11 1 N.C. 31 Z Always an input N.C. 33 Z Always an input N.C. 34 Z Always an input GPIO0 43 Z GPIO1 44 Z CID0 45 Z CID1 46 Z EAPD 47 Z SPDIF 48 Z Must be held high at the rising edge of RESET# Must be held low at rising edge of RESET# Note: Pins 31, 33, and 34 are NO CONNECTS. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 85 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 11. STAC9752A/9753A PIN DESCRIPTION 11.1. Pin Description for the 48-pin LQFP Package 36 35 34 33 32 31 30 29 28 27 26 25 LINE_OUT_R LINE_OUT_L NC NC CAP2 NC AFILT2 AFILT1 VREFout VREF AVss1 AVdd1 Figure 24. Pin Description Drawing 37 38 39 40 41 42 43 44 45 46 47 48 48 pin LQFP 24 23 22 21 20 19 18 17 16 15 14 13 LINE_IN_R LINE_IN_L MIC2 MIC1 CD_R CD_GND CD_L VIDEO_R VIDEO_L AUX_R AUX_L PHONE DVdd1 1 XTL_IN 2 XTL_OUT 3 DVss1 4 SDATA_OUT 5 BIT_CLK 6 DVss2 7 SDATA_IN 8 DVdd2 9 SYNC 10 RESET# 11 PC_BEEP 12 MONO_OUT AVdd2 HP_OUT_L No Connect HP_OUT_R AVss2 GPIO0 GPIO1 CID0 CID1 EAPD SPDIF OUT PIN 48: TO DISABLE SPDIF, USE AN 1 KW - 10 KW EXTERNAL PULLUP RESISTOR. Pin 19: The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about 2.5V. The name of the pin in the AC'97 specification is CD_GND, and this has confused many designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to ground will change the internal bias of the entire CODEC, and cause significant distortion. If there is no analog CD input, then this pin can be No-Connect. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 86 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 11.2. Pinout List 48-pin LQFP Package Table 33. STAC9752A/9753A 48 Pin LQFP Pin List Pin# PIN Name Pin# Pin Name 1 DVDD 25 AVDD1 2 XTAL_IN 26 AVSS1 3 XTAL_OUT 27 VREF IN 4 DVSS1 28 VREF_OUT 5 SDATA_OUT 29 AFILT1 6 BIT_CLK 30 AFILT2 7 DVSS2 31 N.C. 8 SDATA_IN 32 CAP2 9 DVDD 33 N.C. 10 SYNC 34 N.C. 11 RESET# 35 Line_Out_L 12 PC_BEEP 36 Line_Out_R 13 PHONE 37 MONO 14 AUX_L 38 AVDD2 15 AUX_R 39 HP_L 16 VIDEO_L 40 No Connect 17 VIDEO_R 41 HP_R 18 CD L 42 AVSS3 19 CD GND ** 43 GPIO0 20 CD R 44 GPIO1 21 MIC_L 45 CID0 22 MIC_R 46 CID1 23 LINE_IN_L 47 EAPD / GPIO 24 LINE_IN_R 48 S/PDIF-OUT PIN 48: TO DISABLE SPDIF, USE AN 1 KW - 10 KW EXTERNAL PULLUP RESISTOR. ** The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about 2.5V. The name of the pin in the AC'97 specification is CD_GND, and this has confused many designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to ground will change the internal bias of the entire CODEC, and cause significant distortion. If there is no analog CD input, then this pin can be No-Connect. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 87 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 11.3. Pin Description for the 32-pad QFN Package 24 23 22 21 20 19 18 17 LINE_OUT_R LINE_OUT_L CAP2 AFILT2 AFILT1 VREF_OUT VREF AVSS1 Figure 25. STAC9752A/9753A 32 pad QFN Pin Description Drawing 25 26 27 28 29 30 31 32 32 pad QFN 16 15 14 13 12 11 10 9 LINE_IN_R LINE_IN_L MIC 2 MIC 1 CD_R CD_GND CD_L PHONE CLOCK_IN SDATA_OUT BIT_CLK DVSS2 SDATA_IN DVDD SYNC RESET# 1 2 3 4 5 6 7 8 MONO_OUT AVDD2 HP_L HP_R AVSS GPIO3 EAPD/GPIO4 SPDIF-OUT PIN 32: TO DISABLE SPDIF, USE AN 1 KW - 10 KW EXTERNAL PULLUP RESISTOR. Pin 11: The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about 2.5V. The name of the pin in the AC'97 specification is CD_GND, and this has confused many designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to ground will change the internal bias of the entire CODEC, and cause significant distortion. If there is no analog CD input, then this pin can be No-Connect. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 88 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 11.4. Pinout List 32-pad QFN Package Table 34. STAC9752A/9753A 32 Pad QFN Pin List Pin# PIN Name Pin# Pin Name 1 CLOCK_IN 17 AVSS1 2 SDATA_OUT 18 VREF IN 3 BIT_CLK 19 VREF_OUT 4 DVSS2 20 AFILT1 5 SDATA_IN 21 AFILT2 6 DVDD 22 CAP2 7 SYNC 23 Line_Out_L 8 RESET# 24 Line_Out_R 9 PHONE 25 MONO 10 CD L 26 AVDD2 11 CD GND ** 27 HP_L 12 CD R 28 HP_R 13 MIC 1 29 AVSS3 14 MIC 2 30 GPIO1 15 LINE IN L 31 EAPD / GPIO 16 LINE IN R 32 S/PDIF-OUT PIN 32: TO DISABLE SPDIF, USE AN 1 KW - 10 KW EXTERNAL PULLUP RESISTOR. Pin 11: The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about 2.5V. The name of the pin in the AC'97 specification is CD_GND, and this has confused many designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to ground will change the internal bias of the entire CODEC, and cause significant distortion. If there is no analog CD input, then this pin can be No-Connect. 11.5. STAC9752A/9753A Digital I/O These signals connect the STAC9752A/9753A to its AC'97 controller counterpart, an external crystal, multi-CODEC selection and external audio amplifier. Table 35. STAC9752A/9753A Digital Connection Signals Pin Name 48 LQFP 32 QFN Type Pin # Pin # Description Internal Pull-up /Pull-down XTL_IN / CLOCK_IN 2 1 I Clock Input N/A XTL_OUT 3 - I/O 24.576 MHz Crystal N/A SDATA_OUT 5 2 I AC-Link Serial Data output (inbound stream) N/A BIT_CLK 6 3 I/O AC-Link Bit Clock Pull-down 50K +/- 25% SDATA_IN 8 5 O AC-Link Serial Data input, (outbound stream) N/A SYNC 10 7 I AC-Link Frame Sync N/A TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 89 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Table 35. STAC9752A/9753A Digital Connection Signals 48 LQFP 32 QFN Type Pin # Pin # Pin Name Description Internal Pull-up /Pull-down RESET# 11 8 I AC-Link Reset N/A GPIO0 43 - I/O General Purpose I/O Pull-up 50K +/- 25% GPIO1 44 30 I/O General Purpose I/O Pull-up 50K +/- 25% CID0 45 - Chip ID Select0 Pull-up 50K +/- 25% CID1 46 - Chip ID Select1 Pull-up 50K +/- 25% Pull-down 50K +/- 25% Pull-down 50K +/- 25% EAPD/GPIO 47 31 I/O External Amplifier Power Down General Purpose I/O SPDIF-OUT 48 32 O SPDIF digital output 11.6. STAC9752A/9753A Analog I/O These signals connect the STAC9752A/9753A to analog sources and sinks, including microphones and speakers. Table 36. STAC9752A/9753A Analog Connection Signals Pin Name 48 LQFP Pin # PHONE 13 32 QFN Type Pin # 9 I^ Description Phone Input Internal Pull-up /Pull-down N/A AUX_L 14 - I^ Aux Left Channel N/A AUX_R 15 - I^ Aux Right Channel N/A VIDEO_L 16 - I^ Video Audio Left Channel N/A VIDEO_R 17 - I^ Video Audio Right Channel N/A CD_L 18 10 I^ CD Audio Left Channel N/A CD_GND 19 11 I^ CD Audio analog Return (see note 3) N/A CD_R 20 12 I^ CD Audio Right Channel N/A MIC1_L* 21 13 I^ Desktop Microphone Input N/A MIC1_R* 22 14 I^ Second Microphone Input N/A LINE_IN_L* 23 15 I* Line In Left Channel N/A LINE_IN_R* 24 16 I* Line In Right Channel N/A LINE_OUT_L* 35 23 O* Line Out Left Channel (with headphone support) N/A LINE_OUT_R* 36 24 O* Line Out Right Channel (with headphone support) N/A MONO_OUT 37 25 O To telephony subsystem speakerphone N/A HP_OUT_L* 39 27 O* Headphone Out Left Channel N/A HP_OUT_R 41 28 O* Headphone Out Right Channel N/A 1. ^ any unused input pins should be tied together and connected through a capacitor (0.1 F suggested) to ground, except the MIC inputs which should have their own capacitor to ground if not used. 2. * Universal JackTM capable. Only pins 35/36 OR 39/41 may be used to drive headphones. It is not possible to drive 2 sets of headphones at the same time. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 90 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 3. The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about 2.5V. The name of the pin in the AC'97 specification is CD_GND, and this has confused many designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to ground will change the internal bias of the entire CODEC, and cause significant distortion. If there is no analog CD input, then this pin can be No-Connect. 11.7. STAC9752A/9753A Filter/References These signals are connected to resistors, capacitors, or specific voltages. Table 37. STAC9752A/9753A Filtering and Voltage References Signal Name 48 LQFP 32 QFN Type Pin # Pin # Internal Pull-up /Pull-down Description VREF IN 27 18 O Analog ground N/A VREFOUT 28 19 O Reference Voltage out 5mA drive N/A AFILT0 29 20 O Anti-Aliasign FIlter Cap - ADC Right Channel N/A AFILT1 30 21 O Anti-Aliasign FIlter Cap - ADC Left Channel N/A CAP2 32 20 O ADC reference Cap N/A 11.8. STAC9752A/9753A Power and Ground Signals Pin Name 48 LQFP Pin # 32 QFN Pin # Type AVdd2 38 26 I Analog Vdd = 5.0V or 3.3V N/A AVss1 26 17 I Analog Gnd N/A AVss3 42 29 I Analog Gnd N/A DVdd2 9 6 I Digital Vdd = 3.3V N/A DVss1 4 - I Digital Gnd N/A DVss2 7 4 I Digital Gnd N/A Internal Pull-up /Pull-down Description Table 38. STAC9752A/9753A Power and Ground Signals 11.9. STAC9752A/9753A No Connects These pins have no function and may be connected to traditional AC97 functions. Pin Name 48 LQFP Pin # 32 QFN Pin # Type N.C. 31 - - No Connect Pull-down 50K +/-25% N.C. 33 - - No Connect Pull-down 50K +/-25% N.C. 34 - - No Connect Pull-down 50K +/-25% N.C. 40 - - No Connect Pin is high impedance, can be left floating Description Internal Pull-up /Pull-down Table 39. STAC9752A/9753A No Connects TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 91 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 12. ORDERING INFORMATION Ordering Information Part Number Package Temp Range Supply Range STAC9752AXTAEyyX 48-pin RoHS QFP 7mm x 7mm x 1.4mm 0 C to +70 C DVdd = 3.3V, AVdd = 5.0V STAC9753AXTAEyyX 48-pin RoHS QFP 7mm x 7mm x 1.4mm 0 C to +70 C DVdd = 3.3V, AVdd = 3.3V STAC9752AXNAEyyX 32-pin RoHS QFN 5mm x 5mm x 0.9mm 0 C to +70 C DVdd = 3.3V, AVdd = 5.0V STAC9753AXNAEyyX 32-pin RoHS QFN 5mm x 5mm x 0.9mm 0 C to +70 C DVdd = 3.3V, AVdd = 3.3V Note: the yy is the revision. Comtact sales for currnet orderable information. Add an "R" to thye end fo rtape and reel delivery. MOQ is 2Ku for 48pin QFP and 2.5ku for 32pin QFN. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 92 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 13. PACKAGE DRAWINGS AND PC BOARD LAYOUT INFORMATION 13.1. 48-Pin LQFP Figure 26. Package Drawing - 48-pin LQFP A2 D Key A A1 D1 E1 E b 48 pin LQFP e LQFP Dimensions in mm Min. Nom. Max. A 1.40 1.50 1.60 A1 0.05 0.10 0.15 A2 1.35 1.40 1.45 D 8.80 9.00 9.20 D1 6.90 7.00 7.10 E 8.80 9.00 9.20 E1 6.90 7.00 7.10 L 0.45 0.60 0.75 e Pin 1 0.50 c 0.09 - 0.20 b 0.17 0.22 0.27 c TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 93 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 13.2. 32-Pad QFN Figure 27. Package Drawing - 32-pad QFN QFN Dimensions in mm Key Min Nom Max A - 0.60 0.80 A1 0 0.02 0.05 A3 b (c)2014 TEMPO SEMICONDCUTOR, INC. 94 0.18 0.25 D 5.00 BSC D1 3.50 BSC E 5.00 BSC E1 3.50 BSC e 0.50 BSC 0.30 L 0.30 0.40 0.50 D2 3.20 3.50 3.60 E2 3.20 3.50 3.60 ZD TSITM CONFIDENTIAL 0.20 REF. 0.75 BSC ZE 0.75 BSC R 0.20~0.25 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 13.3. PC Board Recommendations for 32-pad QFN Package Figure 28. Recommended PCB Layout for 32-pad QFN Package SUGGESTED FOOTPRINT PAD DETAIL 4.75 mm 0.30 mm 2.375 mm 32 0.15 mm 24 1 0.50 mm typical 0.375 mm 8 2.375 mm 0.75 mm 16 4.75 mm NOTES: 1. Oblong pad is preferred geometry. 2. Oblong pad may be replaced with Rectangular pad of the same overall dimensions. 3. Oblong pad may be replaced with Bullet pad of the same overall dimensions. If a Bullet pad is used, flat shall be to the outside. 4. Solderpaste shall be oblong pad regardless of the pad geometry. Solderpaste opening shall be the same dimensions as pad detail. 5. Recommended solderpaste stencil thickness is 0.127 mm, electropolished. 6. Soldermask is to be 1 mm larger in X- and Y-dimensions. TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 95 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 14. SOLDER REFLOW PROFILE 14.1. Standard Reflow Profile Data Note: These devices can be hand soldered at 360 oC for 3 to 5 seconds. FROM: IPC / JEDEC J-STD-020C "Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices" (www.jedec.org/download). Profile Feature Pb Free Assembly o Average Ramp-Up Rate (Tsmax - Tp) 3 C / second max Preheat Temperature Min (Tsmin) Temperature Max (Tsmax) Time (tsmin - tsmax) 150 oC 200 oC 60 - 180 seconds Time maintained above Temperature (TL) Time (tL) 217 oC 60 - 150 seconds Peak / Classification Temperature (Tp) Time within 5 oC of actual Peak Temperature (tp) See "Package Classification Reflow Temperatures" on page 96. 20 - 40 seconds Ramp-Down rate 6 oC / second max Time 25 oC to Peak Temperature 8 minutes max Note: All temperatures refer to topside of the package, measured on the package body surface. Figure 29. Reflow Profile 14.2. Pb Free Process - Package Classification Reflow Temperatures TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. Package Type MSL Reflow Temperature LQFP 48-pin 3 260 oC* QFN 32-pad 3 260 oC* 96 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 15. APPENDIX A: PROGRAMMING REGISTERS Reg # Name D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default 00h Reset RSRVD SE4 SE3 SE2 SE1 SE0 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 6A90h 02h Master Volume Mute RSRVD ML5 ML4 ML3 ML2 ML1 ML0 Reserved MR5 MR4 MR3 MR2 MR1 MR0 8000h 04h HP_OUT Mixer Volume Mute RSRVD HPL5 HPL4 HPL3 HPL2 HPL1 HPL0 Reserved HPR5 HPR4 HPR3 HPR2 HPR1 HPR0 8000h 06h Master Volume Mono Mute MM5 MM4 MM3 MM2 MM1 MM0 8000h 0Ah PC_BEEP Volume Mute 0Ch Phone volume Mute 0Eh Mic Volume Mute 10h Line In Volume Mute Reserved GL4 GL3 GL2 GL1 GL0 12h CD Volume Mute Reserved GL4 GL3 GL2 GL1 14h Video Volume Mute Reserved GL4 GL3 GL2 GL1 16h AUX Volume Mute Reserved GL4 GL3 GL2 18h PCM Out Volume Mute Reserved GL4 GL3 GL2 SL2 SL1 SL0 Reserved GL3 GL2 GL1 GL0 3D Reserved MIX MS Reserved X X F7 F6 F5 F F3 F2 F1 F0 PV3 PV2 PV1 PV0 GN4 GN3 GN2 GN1 GN0 GN4 GN3 GN2 GN1 GN0 8008h Reserved GR4 GR3 GR2 GR1 GR0 8808h GL0 Reserved GR4 GR3 GR2 GR1 GR0 8808h GL0 Reserved GR4 GR3 GR2 GR1 GR0 8808h GL1 GL0 Reserved GR4 GR3 GR2 GR1 GR0 8808h GL1 GL0 Reserved GR4 GR3 GR2 GR1 GR0 8808h SR2 SR1 SR0 0000h GR3 GR2 GR1 GR0 8000h Reserved Reserved Reserved boosten RSRVD 8008h 1Ah Record Select 1Ch Record Gain Mute 20h General Purpose POP BYP 22h 3D Control 24h Audio Int. & Paging I4 I3 I2 I1 I0 26h Powerdownn Ctrl/Stat EAPD PR6 PR5 PR4 PR3 PR2 PR1 PR0 28h Extended Audio ID ID1 ID0 REV1 REV0 AMAP LDAC 2Ah Extended Audio Control/Status VCFG 2Ch PCM DAC Rate SR15 SR14 SR13 SR12 SR11 SR10 SR9 SR8 SR7 SR6 SR5 SR4 SR3 SR2 32h PCM LR ADC Rate SR15 SR14 SR13 SR12 SR11 SR10 SR9 SR8 SR7 SR6 SR5 SR4 SR3 3Ah SPDIF Control V DRS L CC6 CC5 CC4 CC3 CC2 CC1 CC0 PRE 3Eh Extended Modem Status 4Ch GPIO Pin Config Reserved GC1 GC0 0300h (GPIO1) (GPIO0) 4Eh GPIO Pin Polarity/Type Reserved GP1 GP0 FFFFh (GPIO1) (GPIO0) 50h GPIO Pin Sticky Reserved GS1 GS0 0000h (GPIO1) (GPIO0) 52h GPIO Pin Mask Reserved GW1 GW0 0000h (GPIO1) (GPIO0) 54h GPIO Pin Status Reserved GI1 GI0 0000h (GPIO1) (GPIO0) 60h Page 01h CODEC Class/Rev RSRVD Reserved Reserved Reserved SDAC CDAC DSA1 DSA0 0000h DP3 DP2 Reserved PG3 PG2 PG1 PG0 0000h REF ANL DAC ADC 000Fh RSVD SPDIF DRA VRA 0A05h VRA 0400h* SR1 SR0 BB80h SR2 SR1 SR0 BB80h COPY #PCM/A UDIO PRO 2000h GPIO 0100h PRL/RS PRK/RS PRJ/RS PRI/RS MADC/ LDAC/R SDAC/R CDAC/ VRM/R DRA/RS SPCV SPSA1 SPSA0 SPDIF VD VD VD VD RSVD SVD SVD RSVD SVD VD SPSR1 SPSR2 Reserved Reserved CL4 PRA CL3 CL2 CL1 CL0 Reserved RV7 0000h RV6 RV5 RV4 RV3 RV2 RV1 RV0 12xxh PVI6 PVI5 PVI4 PVI3 PVI2 PVI1 PVI0 FFFFh PI6 PI5 PI4 PI3 PI2 PI1 PI0 FFFFh FC3 FC2 FC1 FC0 T/R 0000h FIP xxxxh VENDOR Reserved PCI SVID PVI15 PVI14 PVI13 PVI12 PVI11 PVI10 PVI9 PVI8 PVI7 VENDOR Reserved PCI SID PI15 PI14 PI13 PI12 PI11 PI10 PI9 66h 66h Page 01h LPBK Reserved 64h 64h Page 01h Reserved Reserved 62h 62h Page 01h Reserved RSRVD 0000h PI8 PI7 VENDOR Reserved Function Select Reserved 68h VENDOR Reserved 68h Page 01h Function Information 6Ah Digital Audio Control 6Ah Page 01h Sense Details TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. G4 G3 G2 G1 G0 INV DL4 DL3 DL2 DL1 DL0 IV Reserved Reserved ST2 ST1 ST0 S4 S3 S2 97 S1 S0 OR1 OR0 SR5 SR4 SR3 SPOR DO1 RSVD 0000h SR2 SR1 SR0 NA V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack Reg # Name 6Ch Revision Code D15 D14 D13 D12 D11 D10 D9 D6 D5 D4 D3 D2 D1 D0 Default xxxxh Reserved Analog Special AC97 ALL MIX Reserved MUTE FIX DISBLE Reserved 6Eh Page 01h ADC slot1 ADC slot0 RSVD MIC GAIN VALUE SPLY OVR EN SPLY OVR VAL 1000h Reserved 70h 72h D7 xxxx 6Ch Page 01h 6Eh D8 VENDOR Reserved Analog Current Adjust 74h EAPD Access 76h Regsiter 78 Enable 78h Universal JackTM Select EAPD EAPD_ OEN Reserved 0000h INT APOP Reserved Reserved Reserved 0000h INTDIS GPIO ACC GPIO SLT12 EN15:0 HP Sel LO Sel RSVD LI Sel MIC Sel 0800h 0000h STMIC MS HP3dB SEL PWDN DAC BYHP DAC BYLO RSVD RSVD ADC HPF BYP 0000h 7Ah Reserved 7Ch Vendor ID1 1 0 0 0 0 0 1 VENDOR Reserved 1 1 0 0 0 0 1 0 0 8384h 0000h 7Eh Vendor ID2 9752 0 1 1 1 0 1 1 0 0 1 0 0 0 0 1 0 7652h *depends upon chip ID TSITM CONFIDENTIAL (c)2014 TEMPO SEMICONDCUTOR, INC. 98 V 1.6 10/14 STAC9752A/9753A STAC9752A/9753A AC'97 2.3 CODECs with Stereo Microphone & Universal Jack 16. REVISION HISTORY Revision Date Description of Change 0.9 Inital Release 0.91 Corrected Note 4 in performance characteristics, was missing the text "Ratio of Full Scale signal toTHD+N output with -3dB signal, measured "A weighted" over a". Complete note now reads "Ratio of Full Scale signal toTHD+N output with -3dB signal, measured "A weighted" over a 20 Hz to a 20 KHz bandwidth. 48 KHz Sample Frequency". 0.92 Added updated 32-pin package drawing 0.93 Added more 32-pin package information - Recommended PCB Layout. Added pull-up/ pull-down column to pin characteristics table. 0.94 Corrected pin 40 LQFP 48-pin package error. It is not a Headphone_Comm, but is a no connect. 1.0 Removed "Preliminary" from the Datasheet. 1.1 Updated 48-pin and 32-pin package drawings. Updated reflow profile information. 1.2 Revised reflow profile information. 1.3 Updated Logo. Updated 32-pin package drawing. 1.4 30 October 2006 1.5 Dec 2006 1.6 October 2014 Release in IDT format. corrected orderable part numbers and added note. Released in TSI format www.temposemi.com 8627 N. MoPac Expwy Suite 130 Austin, Texas 78759 DISCLAIMER Tempo Semiconductor, Inc. (TSI) and its subsidiaries reserve the right to modify the products and/or specifications described herein at any time and at TSI's sole discretion. All information in this document, including descriptions of product features and performance, is subject to change without notice. Performance specifications and the operating parameters of the described products are determined in the independent state and are not guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of TSI's products for any particular purpose, an implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property rights of TSI or any third parties. TSI's products are not intended for use in life support systems or similar devices where the failure or malfunction of an TSI product can be reasonably expected to significantly affect the health or safety of users. Anyone using an TSI product in such a manner does so at their own risk, absent an express, written agreement by TSI. Tempo Semiconductor, TSI and the TSI logo are registered trademarks of TSI. Other trademarks and service marks used herein, including protected names, logos and designs, are the property of TSI or their respective third party owners. Copyright 2014. All rights reserved. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Tempo Semiconductor: STAC9752AXTAED1XR STAC9752AXTAED1X STAC9753AXTAED1X STAC9753AXTAED1XR