CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone with CX20548 SmartDAA and CX20452 Codec Data Sheet DSH-201722F July 17, 2012 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Revision Record Revision A B C D E F Date 7/14/2008 7/29/2008 7/31/2008 8/15/2011 5/15/2012 7/17/2012 Comments Initial release Rev B release Rev C release Rev D release Rev E release Rev F release (c) 2008, 2011, 2012, Conexant Systems, Inc. All Rights Reserved. Information in this document is provided in connection with Conexant Systems, Inc. (Conexant) products. These materials are provided by Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or omissions in these materials. Conexant may make changes to this document at any time, without notice. Conexant advises all customers to ensure that they have the latest version of this document and to verify, before placing orders, that information being relied on is current and complete. Conexant makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to its specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Conexant's Terms and Conditions of Sale for such products, Conexant assumes no liability whatsoever. THESE MATERIALS ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE AND/OR USE OF CONEXANT PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. 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For additional disclaimer information, please consult Conexant's Legal Information posted at www.conexant.com which is incorporated by reference. Conexant Lead-free products are china RoHS Compliant: Reader Response: Conexant strives to produce quality documentation and welcomes your feedback. Please send comments and suggestions to conexant.tech.pubs@conexant.com. For technical questions, contact your local Conexant sales office or field applications engineer. ii 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet DSH-201722F 2012 Conexant Systems, Inc. iii CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Contents Document Revision History .......................................................................................................... ix 1. Introduction .......................................................................................................................... 1-1 1.1 1.2 1.3 1.4 1.5 Overview ................................................................................................................................................... 1-1 Features .................................................................................................................................................... 1-3 1.2.1 Applications ................................................................................................................................ 1-4 Technical Overview ................................................................................................................................... 1-5 1.3.1 General Description .................................................................................................................... 1-5 1.3.2 Embedded MCU Firmware ......................................................................................................... 1-5 1.3.3 Operating Modes ........................................................................................................................ 1-5 1.3.3.1 Data/Fax Modes ........................................................................................................... 1-5 1.3.3.2 V.44 Data Compression ................................................................................................ 1-6 1.3.3.3 Synchronous Access Mode (SAM) - Video Conferencing............................................. 1-6 1.3.3.4 TAM Mode .................................................................................................................... 1-6 1.3.3.5 Speakerphone Mode (Optional) .................................................................................... 1-6 1.3.3.6 Worldwide Operation .................................................................................................... 1-7 1.3.4 Reference Designs ..................................................................................................................... 1-8 Hardware Description................................................................................................................................ 1-9 1.4.1 CX93021-2x Modem ................................................................................................................... 1-9 1.4.2 Digital Isolation Barrier ................................................................................................................ 1-9 1.4.3 CX20452 Codec (Optional) ......................................................................................................... 1-9 1.4.4 CX20548 SmartDAA Line Side Device ....................................................................................... 1-9 Commands .............................................................................................................................................. 1-10 2. Technical Specifications....................................................................................................... 2-1 2.1 2.2 2.3 iv Serial DTE Interface Operation ................................................................................................................. 2-1 2.1.1 Automatic Speed/Format Sensing .............................................................................................. 2-1 Establishing Data Modem Connections .................................................................................................... 2-2 2.2.1 Dialing ......................................................................................................................................... 2-2 2.2.2 Modem Handshaking Protocol .................................................................................................... 2-2 2.2.3 Call Progress Tone Detection ..................................................................................................... 2-2 2.2.4 Answer Tone Detection............................................................................................................... 2-2 2.2.5 Ring Detection ............................................................................................................................ 2-2 2.2.6 Billing Protection ......................................................................................................................... 2-2 2.2.7 Connection Speeds .................................................................................................................... 2-3 2.2.8 Automode ................................................................................................................................... 2-3 Data Mode ................................................................................................................................................ 2-3 2.3.1 Speed Buffering (Normal Mode) ................................................................................................. 2-3 2.3.2 Flow Control ................................................................................................................................ 2-3 2.3.3 Escape Sequence Detection....................................................................................................... 2-4 2.3.4 BREAK Detection ....................................................................................................................... 2-4 2.3.5 Telephone Line Monitoring ......................................................................................................... 2-4 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.3.6 Fall Forward/Fallback (V.92/V.90/V.34/V.32bis/V.32) ................................................................. 2-4 2.3.7 Retrain ........................................................................................................................................ 2-4 2.3.8 Programmable Inactivity Timer ................................................................................................... 2-4 2.3.9 DTE Signal Monitoring ................................................................................................................ 2-4 2.3.10 Call Progress Speaker Interface ................................................................................................. 2-5 2.3.11 Serial EEPROM Interface ........................................................................................................... 2-5 V.92 Features............................................................................................................................................ 2-5 2.4.1 Modem-on-Hold .......................................................................................................................... 2-5 2.4.2 Quick Connect ............................................................................................................................ 2-5 2.4.3 PCM Upstream ........................................................................................................................... 2-6 Error Correction and Data Compression ................................................................................................... 2-6 2.5.1 V.42 Error Correction .................................................................................................................. 2-6 2.5.2 MNP 2-4 Error Correction ........................................................................................................... 2-6 2.5.3 V.44 Data Compression .............................................................................................................. 2-6 2.5.4 V.42bis Data Compression ......................................................................................................... 2-6 2.5.5 MNP 5 Data Compression .......................................................................................................... 2-6 Voice/Audio Mode ..................................................................................................................................... 2-7 2.6.1 Online Voice Command Mode .................................................................................................... 2-7 2.6.2 Voice Receive Mode ................................................................................................................... 2-7 2.6.3 Voice Transmit Mode .................................................................................................................. 2-7 2.6.4 Full-Duplex Receive and Transmit Mode .................................................................................... 2-7 2.6.5 Tone Detectors ........................................................................................................................... 2-7 2.6.6 Speakerphone Mode (Optional) .................................................................................................. 2-8 V.80 Synchronous Access Mode (SAM) ................................................................................................... 2-8 Full-Duplex Speakerphone (FDSP) Mode (Optional) ................................................................................ 2-8 Telephony Extensions ............................................................................................................................... 2-8 2.9.1 Line-in-Use Detection ................................................................................................................. 2-8 2.9.2 Extension Pick-up Detection ....................................................................................................... 2-9 2.9.3 Remote Hang-up Detection ........................................................................................................ 2-9 Point-of-Sales Support .............................................................................................................................. 2-9 Fax Class 1, Fax Class 1.0, and Fax Class 2 Operation ........................................................................... 2-9 Tone Detectors.......................................................................................................................................... 2-9 Call Waiting Tone Detection .................................................................................................................... 2-10 Caller ID .................................................................................................................................................. 2-10 Worldwide Country Support .................................................................................................................... 2-10 Diagnostics ............................................................................................................................................. 2-11 Low Power Modes................................................................................................................................... 2-11 2.17.1 Idle Mode .................................................................................................................................. 2-11 2.17.2 Sleep Mode............................................................................................................................... 2-11 2.17.3 Deep Sleep Mode ..................................................................................................................... 2-11 2.17.4 Stop Mode ................................................................................................................................ 2-11 3. Hardware Interface............................................................................................................... 3-1 3.1 CX93021-2x Modem Hardware Interface Signals ..................................................................................... 3-1 3.1.1 CX93021-2x Modem Interface Signal Summary ......................................................................... 3-1 3.1.1.1 LSD Interface (Through DIB) ........................................................................................ 3-1 3.1.1.2 Call Progress Speaker Interface ................................................................................... 3-1 3.1.1.3 Clock Select Interface ................................................................................................... 3-1 3.1.1.4 Serial EEPROM Interface ............................................................................................. 3-1 3.1.1.5 Serial DTE Interface and Indicator Outputs .................................................................. 3-1 3.1.1.6 CX20452 Codec Interfaces ........................................................................................... 3-2 3.1.2 CX93021-2x Modem Pin Assignments and Signal Definitions .................................................... 3-3 3.1.3 CX93021-2x Modem Electrical Characteristics ........................................................................... 3-7 DSH-201722F 2012 Conexant Systems, Inc. v CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.2 3.3 3.4 3.5 CX20548 LSD Hardware Pins and Signals ............................................................................................... 3-8 3.2.1 General ....................................................................................................................................... 3-8 3.2.1.1 Host Side Device (HSD) Interface (Through DIB) ......................................................... 3-8 3.2.1.2 Power and Ground........................................................................................................ 3-8 3.2.1.3 Telephone Line Interface .............................................................................................. 3-8 3.2.1.4 Voltage References ...................................................................................................... 3-8 3.2.1.5 General Purpose Input/Output ...................................................................................... 3-8 3.2.2 Pin Assignments and Signal Definitions...................................................................................... 3-9 CX20452 Codec Hardware Interface Signals .......................................................................................... 3-13 3.3.1 CX20452 Codec Pin Assignments and Signal Definitions ........................................................ 3-13 3.3.2 CX20452 Codec Electrical Characteristics ............................................................................... 3-16 Operating Conditions, Absolute Maximum Ratings, and Power Requirements ....................................... 3-17 Crystal and Clock Specifications ............................................................................................................. 3-20 4. Package Dimensions ........................................................................................................... 4-1 5. Recommended QFN Surface Mount Land Pattern .............................................................. 5-1 vi 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Figures Figure 1-1. CSM92-SP Modem Simplified Interface Diagram .................................................................................... 1-2 Figure 3-1. CX93021-2x Modem Hardware Interface Signals .................................................................................... 3-3 Figure 3-2. CX93021-2x Modem 36-Pin QFN Pin Signals ......................................................................................... 3-4 Figure 3-3. CX20548 LSD Hardware Interface Signals .............................................................................................. 3-9 Figure 3-4. CX20548 LSD 16-Pin QFN Pin Signals ................................................................................................. 3-10 Figure 3-5. CX20452 Codec Hardware Interface Signals ........................................................................................ 3-13 Figure 3-6. CX20452 Codec 24-Pin QFN Pin Signals .............................................................................................. 3-14 Figure 4-1. Package Dimensions for 36-Pin QFN ...................................................................................................... 4-2 Figure 4-2. Package Dimensions for 24-Pin QFN ...................................................................................................... 4-3 Figure 4-3. Package Dimensions for 16-Pin QFN, Punch Style ................................................................................. 4-5 Figure 4-4. Package Dimensions for 16-Pin QFN, Sawn Style .................................................................................. 4-5 Figure 5-1. Recommended Surface Mount Land Pattern for 36-Pin QFN .................................................................. 5-1 Figure 5-2. Recommended Surface Mount Land Pattern for 24-Pin QFN ................................................................. 5-2 Figure 5-3. Recommended Surface Mount Land Pattern for 16-Pin QFN .................................................................. 5-3 DSH-201722F 2012 Conexant Systems, Inc. vii CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Tables Table 1-1. CSM92-SP Ordering Information .............................................................................................................. 1-2 Table 1-2. Default Countries Supported ..................................................................................................................... 1-7 Table 2-1. +MS Command Automode Connectivity ................................................................................................... 2-3 Table 3-1. CX93021-2x Modem 36-Pin QFN Pin Signals .......................................................................................... 3-4 Table 3-2. CX93021-2x Modem Hardware Signal Definitions .................................................................................... 3-5 Table 3-3. CX93021-2x Modem I/O Type Definitions ................................................................................................. 3-7 Table 3-4. CX93021-2x Modem DC Electrical Characteristics ................................................................................... 3-7 Table 3-5. CX20548 LSD 16-Pin QFN Pin Signals .................................................................................................. 3-10 Table 3-6. CX20548 LSD Hardware Signal Definitions ............................................................................................ 3-11 Table 3-7. CX20548 LSD GPIO DC Electrical Characteristics ................................................................................. 3-12 Table 3-8. CX20548 LSD AVDD and DVDD DC Electrical Characteristics .............................................................. 3-12 Table 3-9. CX20452 Codec 24-Pin QFN Pin Signals ............................................................................................... 3-14 Table 3-10. CX20452 Codec Hardware Signal Definitions ....................................................................................... 3-15 Table 3-11. CX20452 Codec DC Electrical Characteristics ..................................................................................... 3-16 Table 3-12. CX20452 Codec Analog Electrical Characteristics ............................................................................... 3-16 Table 3-13. CX93021-2x Modem and CX20452 Codec Operating Conditions ........................................................ 3-17 Table 3-14. Absolute Maximum Ratings .................................................................................................................. 3-18 Table 3-15. CX93021-2x Current and Power Requirements .................................................................................... 3-19 Table 3-16. CX20452 Codec Current Requirements................................................................................................ 3-19 Table 3-17. Crystal Specifications ............................................................................................................................ 3-20 Table 3-18. Clock Specifications .............................................................................................................................. 3-20 Table 4-1. Common Table for 16-QFN Punch and Sawn Style Package Dimensions ............................................... 4-4 viii 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Document Revision History DSH-201722F 2012 Conexant Systems, Inc. ix CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 1. Introduction 1.1 Overview The Conexant CSM92-SP V.92 Modem supports V.92 analog data modem operation and 14.4 kbps fax modem operation. In addition, the modem supports remote telephone answering machine (TAM) and speakerphone. The modem also supports V.44/V.42bis/MNP 5 data compression for greater data throughput and V.42 LAPM/MNP2-4 error correction protocol for increased data integrity and reliability. The CSM92-SP device set consists of a CX93021-2x V.92 Modem device in a 36-pin QFN, a CX20548 SmartDAA 4 Line Side Device (LSD) in a 16-pin QPN, and a CX20452 Codec in a 24-pin QFN. The CSM92 device set is also available that does not include the CX20452 Codec and does not support speakerphone. The CX93021-2x has a serial interface and codec interface for connection to the optional CX20452 Codec for speakerphone applications. Table 1-1 lists the ordering information. The CX93021-2x modem device integrates a microcontroller (MCU), a digital signal processor (DSP), internal RAM, internal ROM, and a SmartDAA system side device (SSD) onto a 36-pin QFN. Figure 1-1 illustrates the top-level modem interface. Conexant's SmartDAA technology used in the SmartDAA 4 LSD eliminates the need for bulky analog transformers, relays, and opto-isolators typically used in discrete DAA implementations. The SmartDAA 4 LSD operates without drawing power from the phone line, unlike line-powered DAAs, and is therefore not subject to variations in line voltage conditions. The SmartDAA 4 LSD also adds enhanced telephony extension features to the modem's operation and other functions such as Call Waiting detection, and Caller ID decoding. Incorporating Conexant's proprietary Digital Isolation Barrier (DIB) design and other innovative DAA features, the SmartDAA architecture simplifies application design and minimizes layout area to reduce design cost. The CSM92-SP modem supports position independent, full-duplex speakerphone (FDSP) operation using microphone and speaker, as well as other voice/TAM applications using handset or headset. In TAM mode, enhanced 2-bit or 4-bit per sample coding schemes at 8 kHz sample rate provide flexible format compatibility and allows efficient digital storage of voice/audio. Also supported are 8-bit A-law, -law, and linear coding and IMA 4-bit ADPCM coding. This mode supports applications such as digital telephone answering machine, voice annotation, and recording from and playback to the telephone line. The modem operates by executing masked code from internal ROM. The modem features internal RAM memory that enhances the modem's flexibility. The modem's internal RAM can be used to load new country profiles, override existing country profiles or add customized firmware code. An optional external serial NVRAM is supported. The optional external NVRAM adds the convenience of permanent storage, just like internal RAM, NVRAM can be used to store new country profiles, override existing ones or add customized firmware code. Small, low-profile packages, reduced voltage operation, and low power consumption make this device set an ideal solution for embedded applications. DSH-201722F 2012 Conexant Systems, Inc. 1-1 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 1-1. CSM92-SP Ordering Information Model/Order/Part Numbers Marketing Name Device Set Order No. CSM92-SP CSM34-SP CSM32-SP DS92-CSMSP-21Z DS34-CSMSP-22Z DS32-CSMSP-23Z Modem Device [36-Pin QFN] Part No. CX93021-21Z CX93021-22Z CX93021-23Z Supported Functions Line Side Device (LSD) [16-Pin QFN] Part No. CX20548-11Z (Note 3) CX20548-11Z (Note 3) CX20548-11Z (Note 3) Codec [24-Pin QFN] Part No. CX20452-A CX20452-A CX20452-A V.92 Data V.34 Data V.32bis Data Y -- -- Y Y -- Y Y Y Fax Class 1 & 2, TAM, Speakerphone Y Y Y Notes: 1. Supported functions (Y = Supported; -- = Not supported). 2. All devices are lead-free (Pb-free) and RoHS-compliant. These devices are compatible with leaded reflow processes. 3.. Device is marked 20548-A on the package Figure 1-1. CSM92-SP Modem Simplified Interface Diagram CX93021-2x Modem 36-Pin QFN Serial Interface 28.224 MHz or 27.000 MHz Crystal orClock Source DTE/Host Interface RAM Digital Isolation Barrier (DIB) MCU/DSP/ SmartDAA Interface DAA Hardware CX20548 SmartDAA 4 Line Side Device (LSD) 16-Pin QFN Line Side DIB Interface (LSDI) Codec Telephone Line Interface External Discrete Components Telephone Line TIP RING Optional NVRAM ROM CX20452 Codec 24-Pin QFN (Optional) 1-2 Mic Speaker 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 1.2 Features DSH-201722F Modulations and protocols ITU-T V.92 (V.92 model) Modem-on-Hold (MOH) Quick connect (QC) PCM upstream V.90 (V.92 model) V.34 (V.92 and V.34 models) V.32bis, V.32, V.22bis, V.22, V.23, V.21 V.23 reverse, V.23 half-duplex Bell 212A/Bell 103 V.29 FastPOS V.22bis fast connect V.80 Synchronous Access Mode Data compression and error correction V.44 data compression V.42bis and MNP 5 data compression V.42 LAPM and MNP 2-4 error correction Fax modem send and receive rates up to 14.4 kbps V.17, V.29, V.27 ter, and V.21 channel 2 EIA/TIA 578 Class 1, T.31 Class 1.0, and Class 2 Call Waiting (CW) detection and Type II Caller ID decoding during data mode Type I Caller ID (CID) decoding Telephony/TAM V.253 commands 2-bit and 4-bit ADPCM, 4-bit IMA ADPCM, 8-bit and 16-bit linear PCM, and 8-bit -law and A-law PCM coding 8 kHz sample rate Concurrent DTMF, ring, and Caller ID detection DTE/host interface Serial DTE interface Direct Mode Asynchronous Mode No external memory required Sixty-three embedded and upgradeable country profiles Serial NVRAM interface for optional permanent country profile storage Embedded AT commands Full-duplex speakerphone (FDSP) mode using CX20452 Codec (optional) Microphone and speaker interface Telephone handset or headset interface Acoustic and line echo cancellation Microphone gain and muting Speaker volume control and muting 2012 Conexant Systems, Inc. 1-3 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 1.2.1 Applications 1-4 SmartDAA Extension pick-up detection Digital line protection Line reversal detection Line-in-use detection Remote hang-up detection Worldwide compliance Selectable 28.224 MHz or 27.000 MHz frequency of operation Low power and voltage Single +5V supply Low power consumption mode +3.3V I/O level Compact, robust board design Small, low-profile modem packages SmartDAA and DIB technologies Reference design supports 5 kV isolation Small packages CX93021-2x Modem: 36-pin QFN CX20548 LSD: 16-pin QFN CX20452 Codec: 24-pin QFN Internet appliances Video game consoles Video phone terminals Retail modems 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 1.3 Technical Overview 1.3.1 General Description Modem operation, including dialing, call progress, telephone line interface, telephone handset interface, and host DTE interface functions are supported and controlled through the V.250 and V.253-compatible command set. The OEM adds a crystal circuit, DIB components, telephone line interface, telephone handset/telephony extension interface, and other supporting discrete components as supported by the modem model (Table 1-1) and required by the application to complete the system. 1.3.2 Embedded MCU Firmware Embedded MCU firmware performs processing of general modem control, command sets, data modem, error correction and data compression (ECC), worldwide, V.80, and serial DTE host interface functions according to modem models (Table 1-1). 1.3.3 Operating Modes 1.3.3.1 Data/Fax Modes Data modem modes perform complete handshake and data rate negotiations. Using modem modulations to optimize modem configuration for line conditions, the modem can connect at the highest data rate that the channel can support from 56 kbps down to 2400 bps with automatic fallback. In V.92 data modem mode, the modem can receive data from a digital source using a V.92-compatible central site modem at line speeds up to 56 kbps. With PCM upstream enabled, data transmission supports sending data at line speeds up to 48 kbps. When PCM upstream is disabled, data transmission supports sending data at line speeds up to V.34 rates. This mode can fallback to V.34 mode and to lower rates as dictated by line conditions. The following modes in V.92 models are also supported when connected to a V.92compatible server supporting the feature listed. Quick connect, which allows quicker subsequent connection to a server using stored line parameters obtained during the initial connection. The server must support quick connect profiles. Modem-on-Hold, which allows detection and reporting of incoming phone calls on the PSTN with enabled Call Waiting. If the incoming call is accepted by the user, the user has a pre-defined amount of time of holding the data connection for a brief conversation. The data connection resumes upon incoming call termination. The server must support Modem-on-Hold functionality. PCM upstream, which boosts the upstream data rates between the user and V.92 server. A maximum of 48 kbps upstream rate is supported when connected to a V.92 server that supports PCM upstream. In V.34 data modem mode, the modem can operate in 2-wire, full-duplex, asynchronous modes at line rates up to 33.6 kbps. Data modem modes perform complete handshake and DSH-201722F 2012 Conexant Systems, Inc. 1-5 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet data rate negotiations. Using V.34 modulation to optimize modem configuration for line conditions, the modem can connect at the highest data rate that the channel can support from 33600 bps down to 2400 bps with automatic fallback. Automode operation in V.34 is provided in accordance with PN3320 and in V.32bis in accordance with PN2330. All tone and pattern detection functions required by the applicable ITU or Bell standards are supported. In V.32bis data modem mode, the modem can operate at line speeds up to 14.4 kbps. In fax modem mode, the modem can operate in 2-wire, half-duplex, synchronous modes and can support Group 3 facsimile send and receive speeds of 14400, 12000, 9600, 7200, 4800, and 2400 bps. Fax data transmission and reception performed by the modem are controlled and monitored through the EIA/TIA-578 Fax Class 1, T.31 Fax Class 1.0, or Fax Class 2 command interface. Full HDLC formatting, zero insertion/deletion, and CRC generation/checking are provided. 1.3.3.2 V.44 Data Compression V.44 provides more efficient data compression than V.42bis that significantly decreases the download time for the types of files associated with Internet use. This significant improvement is most noticeable when browsing and searching the web since HTML text files are highly compressible. (The improved performance amount varies both with the actual format and with the content of individual pages and files.) 1.3.3.3 Synchronous Access Mode (SAM) - Video Conferencing V.80 Synchronous Access Mode between the modem and the host/DTE is provided for host-controlled communication protocols, e.g., H.324 video conferencing applications. 1.3.3.4 TAM Mode TAM Mode features include 2-bit/4-bit ADPCM, 4-bit IMA ADPCM, 8-bit and 16-bit linear PCM, and 8-bit -law and A-law PCM coding at 8 kHz sample rate. Tone detection/ generation, call discrimination, and concurrent DTMF detection are also supported. TAM Mode is supported by four submodes: 1.3.3.5 Online Voice Command Mode supports connection to the telephone line. Voice Receive Mode supports recording voice or audio data input from the telephone line. Voice Transmit Mode supports playback of voice or audio data to the telephone line. Full-duplex Receive and Transmit Mode. Speakerphone Mode (Optional) When using the optional CX20452 Codec, the modem includes additional telephone handset, external microphone, and external speaker interfaces which support voice and full-duplex speakerphone (FDSP) operation. Hands-free full-duplex telephone operation is supported in Speakerphone Mode under host control. Speakerphone Mode features an advanced proprietary speakerphone algorithm which supports full-duplex voice conversation with acoustic, line, and handset echo cancellation. Parameters are constantly adjusted to maintain stability with automatic fallback from full-duplex to pseudo-duplex operation. The speakerphone algorithm allows position independent placement of microphone and speaker. The host can separately control volume, muting, and AGC in microphone and speaker channels. 1-6 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 1.3.3.6 Worldwide Operation The modem operates in TBR21-compliant and other countries. Country-dependent modem parameters for functions such as dialing, carrier transmit level, calling tone, call progress tone detection, answer tone detection, blacklisting, caller ID, and relay control are programmable. SmartDAA technology allows a single PCB design and single BOM to be homologated worldwide. Advanced features such as extension pick-up detection, remote hang-up detection, line-in-use detection, and digital PBX line protection are supported. Country code IDs are defined by ITU-T T.35. Internal ROM includes default profiles for 63 countries including TBR21-compliant profiles. An additional or modified country profile can be loaded into internal SRAM. A duplicate country profile stored in internal SRAM will override the profile in internal ROM firmware. Additional country profiles can be loaded into external NVRAM for permanent storage. The default countries supported are listed in Table 1-2. Request additional country profiles from a Conexant Sales Office. Table 1-2. Default Countries Supported Country Argentina Australia Austria Belgium Brazil Bulgaria Canada Chile China Colombia Croatia Cyprus Czech Republic Denmark Egypt Estonia Finland France Germany Greece Hong Kong Hungary Iceland India Indonesia Ireland Israel Italy Japan Korea Kuwait Lebanon DSH-201722F Country Code 7 9 0A 0F 16 1B 20 25 26 27 FA 2D 2E 31 36 F9 3C 3D 42 46 50 51 52 53 54 57 58 59 00 61 62 64 Call Waiting Tone Detection (CW) Supported X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 2012 Conexant Systems, Inc. On-Hook Type 1 Caller ID (CID) Supported X X X X X X X X X X X X X X Off-Hook Type 2 Caller ID (CID2) Supported X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 1-7 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Country Luxembourg Malaysia Mexico Morocco Netherlands New Zealand Norway Pakistan Philippines Poland Portugal Romania Russia Saudi Arabia Senegal Singapore Slovakia Slovenia South Africa Spain Sri Lanka Sweden Switzerland Taiwan Thailand Tunisia Turkey UK United Arab Emirates Uruguay USA Reserved 1.3.4 Country Code 69 6C 73 77 7B 7E 82 84 89 8A 8B 8E B8 98 99 9C FB FC 9F A0 A1 A5 A6 FE A9 AD AE B4 B3 B7 B5 FD Call Waiting Tone Detection (CW) Supported X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X On-Hook Type 1 Caller ID (CID) Supported X X X X X X X X X Off-Hook Type 2 Caller ID (CID2) Supported X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Reference Designs A reference design consisting of a motherboard and daughtercard set is available to minimize modem design time, reduce development cost, and accelerate market entry. The part numbers for this design are: CX-9Z-C00217 (motherboard) and CX-9Z-C00234 (daughtercard). A reference modem user's guide (USG-201693) is available in electronic form. This user's guide includes schematics, bill of materials (BOM), vendor part list (VPL), board layout files, and complete documentation. 1-8 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 1.4 Hardware Description 1.4.1 CX93021-2x Modem The CX93021-2x modem includes a Microcontroller (MCU), a Modem Data Pump (MDP), internal ROM, internal RAM, and SmartDAA interface functions. The modem connects to host via a logical V.24 (EIA/TIA-232-E) serial DTE interface. The modem MCU/DSP performs the command processing, host interface functions and telephone line signal modulation/demodulation which reduces computational load on the host processor. The SmartDAA Interface communicates with, and supplies power and clock to the LSD through the DIB. 1.4.2 Digital Isolation Barrier The OEM-supplied Digital Isolation Barrier (DIB) electrically DC isolates the CX930212x from the LSD and telephone line. The modem is connected to a fixed digital ground and operates with standard CMOS logic levels. The LSD is connected to a floating ground and can tolerate high voltage input (compatible with telephone line and typical surge requirements). The DIB transformer couples power and clock from the CX93021-2x to the LSD. The DIB data channel supports bidirectional half-duplex serial transfer of data, control, and status information between the CX93021-2x and the LSD over two lines. 1.4.3 CX20452 Codec (Optional) The optional CX20452 Codec (VC), packaged in a 24-pin QFN, supports voice/fullduplex speakerphone (FDSP) operation with interfaces to a microphone and speaker and to a telephone handset/headset. 1.4.4 CX20548 SmartDAA Line Side Device The CX20548 SmartDAA 4 Line Side Device (LSD) includes a Line Side DIB Interface, a coder/decoder (codec), and a Telephone Line Interface (TLI). The Line Side DIB Interface communicates with, and receives power and clock from, the SmartDAA 4 interface in the host side device (HSD) through the DIB transformer. The clock signal passing through the transformer is rectified in the LSD and filtered using external capacitors. Information is transferred between the LSD and the HSD through the DIB transformer using pulse width modulation The TLI integrates DAA and direct telephone line interface functions and connects directly to the line TIP and RING pins, as well as to external line protection components. Direct LSD connection to TIP and RING allows real-time measurement of telephone line parameters, such as the telephone central office (CO) battery voltage, individual telephone line (copper wire) resistance, and allows dynamic regulation of the off-hook DSH-201722F 2012 Conexant Systems, Inc. 1-9 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet TIP and RING voltage and total current drawn from the central office (CO). This allows the modem to maintain compliance with U.S. and worldwide regulations. 1.5 Commands The modem supports data modem, fax class 1, 1.0, or 2 modem, TAM, V.80 commands, and S Registers in accordance with modem model options. See Doc. REM-201692 for a description of the commands. Data Modem Operation. Data modem functions operate in response to the AT commands when +FCLASS=0. Default parameters support U.S./Canada operation. Fax Mode Operation. Facsimile functions operate in response to fax class 1 commands when +FCLASS=1, to fax class 1.0 commands when +FCLASS=1.0, or to fax class 2 commands when +FCLASS=2. 1-10 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2. Technical Specifications 2.1 Serial DTE Interface Operation 2.1.1 Automatic Speed/Format Sensing Command Mode and Data Mode. The modem can automatically determine the speed and format of the data sent from the DTE. The modem can sense speeds of 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28800, 38400, 57600, and 115200 bps and the following data formats: Data Length No. of Character Length Parity (No. of Bits) Stop Bits (No. of Bits) None 7 2 10 Odd 7 1 10 Even 7 1 10 None 8 1 10 Odd 8 1 11* Even 8 1 11* *11-bit characters are sensed, but the parity bit is stripped off during data transmission in Normal and Error Correction modes. The modem can speed sense data with mark or space parity and configures itself as follows: DTE Configuration 7 mark 7 space 8 mark 8 space DSH-201722F Modem Configuration 7 none 8 none 8 none 8 even 2012 Conexant Systems, Inc. 2-1 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.2 Establishing Data Modem Connections 2.2.1 Dialing DTMF Dialing. DTMF dialing using DTMF tone pairs is supported in accordance with ITU-T Q.23. Pulse Dialing. Pulse dialing is supported in accordance with EIA/TIA-496-A. Blind Dialing. The modem can blind dial in the absence of a dial tone if enabled by the X0, X1, or X3 command. 2.2.2 Modem Handshaking Protocol If a tone is not detected within the time specified in the S7 register after the last digit is dialed, the modem aborts the call attempt. 2.2.3 Call Progress Tone Detection Ringback, equipment busy, congested tone, warble tone, and progress tones can be detected in accordance with the applicable standard. 2.2.4 Answer Tone Detection Answer tone can be detected over the frequency range of 2100 40 Hz in ITU-T modes and 2225 40 Hz in Bell modes. 2.2.5 Ring Detection A ring signal can be detected from a TTL-compatible 15.3 Hz to 68 Hz square wave input. 2.2.6 Billing Protection When the modem goes off-hook to answer an incoming call, both transmission and reception of data are prevented for 2 seconds to allow transmission of the billing tone signal. 2-2 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.2.7 Connection Speeds The modem functions as a data modem when the +FCLASS=0 command is active. Line connection can be selected using the +MS command. The +MS command selects modulation, enables/disables automode, and selects minimum and maximum line speeds (Table 2-1). Table 2-1. +MS Command Automode Connectivity Modulation 2.2.8 <carrier> Bell 103 Bell 212 V.21 V.22 V.22bis V.23 V.32 V.32bis V.34/V.90 upstream B103 B212 V21 V22 V22B V23C V32 V32B V34/V90 V.90 downstream V90 V.92 downstream V92 V.92 upstream V92 Possible (<min_rx_rate>, <min_rx_rate>, (<min_tx_rate>), and <max_tx_rate>) Rates (bps) 300 1200 Rx/75 Tx or 75 Rx/1200 Tx 300 1200 2400 or 1200 1200 9600 or 4800 14400, 12000, 9600, 7200, or 4800 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800, or 2400 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 44000, 42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 44000, 42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000 48000, 46667, 45333, 44000, 42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000, 26667, 25333, 24000 Automode Automode detection can be enabled by the +MS command to allow the modem to connect to a remote modem in accordance with draft PN-3320 for V.34 (Table 2-1). 2.3 Data Mode Data mode exists when a telephone line connection has been established between modems and all handshaking has been completed. 2.3.1 Speed Buffering (Normal Mode) Speed buffering allows a DTE to send data to, and receive data from, a modem at a speed different than the line speed. The modem supports speed buffering at all line speeds. 2.3.2 Flow Control DTE-to-Modem Flow Control. If the modem-to-line speed is less than the DTE-tomodem speed, the modem supports XOFF/XON or RTS/CTS flow control with the DTE to ensure data integrity. DSH-201722F 2012 Conexant Systems, Inc. 2-3 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.3.3 Escape Sequence Detection The +++ escape sequence can be used to return control to the command mode from the data mode. Escape sequence detection is disabled by an S2 Register value greater than 127. 2.3.4 BREAK Detection The modem can detect a BREAK signal from either the DTE or the remote modem. The \Kn command determines the modem response to a received BREAK signal. 2.3.5 Telephone Line Monitoring GSTN Cleardown (V.92, V.90, V.34, V.32bis, V.32). Upon receiving GSTN Cleardown from the remote modem in a non-error correcting mode, the modem cleanly terminates the call. Loss of Carrier (V.22bis and Below). If carrier is lost for a time greater than specified by the S10 register, the modem disconnects. 2.3.6 Fall Forward/Fallback (V.92/V.90/V.34/V.32bis/V.32) During initial handshake, the modem will fallback to the optimal line connection within V.92/V.90/V.34/V.32bis/V.32 mode depending upon signal quality if automode is enabled by the +MS or N1 command. When connected in V.92/V.90/V.34/V.32bis/V.32 mode, the modem will fall forward or fallback to the optimal line speed within the current modulation depending upon signal quality if fall forward/fallback is enabled by the %E2 command. 2.3.7 Retrain The modem may lose synchronization with the received line signal under poor or changing line conditions. If this occurs, retraining may be initiated to attempt recovery depending on the type of connection. The modem initiates a retrain if line quality becomes unacceptable if enabled by the %E command. The modem continues to retrain until an acceptable connection is achieved, or until 30 seconds elapse resulting in line disconnect. 2.3.8 Programmable Inactivity Timer The modem disconnects from the line if data is not sent or received for a specified length of time. In normal or error-correction mode, this inactivity timer is reset when data is received from either the DTE or from the line. This timer can be set to a value between 0 and 255 seconds by using register S30. A value of 0 disables the inactivity timer. 2.3.9 DTE Signal Monitoring DTR#. When DTR# is asserted, the modem responds in accordance with the &Dn and &Qn commands. RTS#. RTS# is used for flow control if enabled by the &K command in normal or errorcorrection mode. 2-4 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.3.10 Call Progress Speaker Interface A digital speaker output (DSPKOUT) is supported. DSPKOUT is a square wave output in Data mode used for call progress or carrier monitoring. This output can be optionally connected to a low-cost on-board speaker, e.g., a sounducer, or to an analog speaker circuit. 2.3.11 Serial EEPROM Interface The 36-pin QFN supports a 2-line serial interface to an optional serial EEPROM. The EEPROM can hold information such as firmware customization, and country code parameters. Data stored in EEPROM takes precedence over the factory default settings. A serial EEPROM is required only if additional storage is required for more country profiles or customized firmware code. The EEPROM size can range from 2 Kb (256 x 8) to 256 Kb (32K x 8) and must support a clock frequency of at least 400 kHz. For overriding, adding new country profiles, or loading NVRAM patches, the EEPROM size must be larger than 2Kb. The size of the EEPROM device will depend on the number of country profiles added or patch size. 2.4 V.92 Features Modem-on-Hold, quick connect, and PCM upstream are only available when connecting in V.92 data mode. V.92 features are only available when the server called is a V.92 server that supports that particular feature. 2.4.1 Modem-on-Hold The Modem-on-Hold (MOH) function enables the modem to place an Internet data connection on hold while using the same line to accept an incoming or place an outgoing voice call. This feature is available only with a connection to a server supporting MOH. MOH can be executed through either of two methods: 2.4.2 One method is to enable MOH through the +PMH command. With Call Waiting Detection (+PCW command) enabled, an incoming call can be detected while online. Using a string of commands, the modem negotiates with the server to place the data connection on hold while the line is released so that it can be used to conduct a voice call. Once the voice call is completed, the modem can quickly renegotiate with the server back to the original data call. An alternative method is to use communications software that makes use of the Conexant Modem-on-Hold drivers. Using this method, the software can detect an incoming call, place the data connection on hold, and switch back to a data connection. Quick Connect The quick connect function enables the modem to shorten the connect time of subsequent calls to a server supporting quick connect. The quick connect feature is supported by the +PQC command. DSH-201722F 2012 Conexant Systems, Inc. 2-5 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.4.3 PCM Upstream PCM upstream boosts the upstream data rates between the user and ISP to reduce upload times for large files and email attachments. A maximum of 48 kbps upstream rate is supported with PCM upstream enabled, in contrast to a maximum of 32.2 kbps upstream rate with PCM upstream not enabled. PCM upstream is supported by the +PCM command. PCM upstream is disabled by default. 2.5 Error Correction and Data Compression 2.5.1 V.42 Error Correction V.42 supports two methods of error correction: LAPM and, as a fallback, MNP 4. The modem provides a detection and negotiation technique for determining and establishing the best method of error correction between two modems. 2.5.2 MNP 2-4 Error Correction MNP 2-4 is a data link protocol that uses error correction algorithms to ensure data integrity. Supporting stream mode, the modem sends data frames in varying lengths depending on the amount of time between characters coming from the DTE. 2.5.3 V.44 Data Compression V.44 data compression encodes pages and files associated with Web pages more efficiently than V.42bis. These files include WEB pages, graphics and image files, and document files. V.44 can provide an effective data throughput rate up to DTE rate for a 56-kbps connection. The improved performance amount varies both with the actual format and with the content of individual pages and files. 2.5.4 V.42bis Data Compression V.42bis data compression mode, enabled by the %Cn command or S46 register, operates when a LAPM connection is established. The V.42bis data compression employs a "string learning" algorithm in which a string of characters from the DTE is encoded as a fixed length codeword and stored in a dictionary. The dictionary is dynamically updated during normal operation. 2.5.5 MNP 5 Data Compression MNP 5 data compression mode, enabled by the %Cn command, operates during an MNP connection. In MNP 5, the modem increases its throughput by compressing data into tokens before transmitting it to the remote modem, and by decompressing encoded received data before sending it to the DTE. 2-6 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.6 Voice/Audio Mode Voice and audio functions are supported by the Voice Mode. Voice Mode includes four submodes: Online Voice Command Mode, Voice Receive Mode, Voice Transmit Mode and Full-Duplex Receive and Transmit Mode. 2.6.1 Online Voice Command Mode This mode results from the connection to the telephone line or a voice/audio I/O device (e.g., microphone, speaker, or handset) through the use of the +FCLASS=8 and +VLS commands. After mode entry, AT commands can be entered without aborting the connection. 2.6.2 Voice Receive Mode This mode is entered when the +VRX command is active in order to record voice or audio data input at the RIN pin, typically from a microphone/handset or the telephone line. Received analog voice samples are converted to digital form and compressed for reading by the host. AT commands control the codec bits-per-sample rate. Received analog mono audio samples are converted to digital form and formatted into 8-bit unsigned linear PCM format for reading by the host. AT commands control the bit length and sampling rate. Concurrent DTMF/tone detection is available at the 8 kHz sample rate. 2.6.3 Voice Transmit Mode This mode is entered when the +VTX command is active in order to playback voice or audio data to the TXA output, typically to a speaker/handset or to the telephone line. Digitized voice data is decompressed and converted to analog form at the original compression quantization sample-per-bits rate then output to the TXA output. Digitized audio data is converted to analog form then output to the TXA output. 2.6.4 Full-Duplex Receive and Transmit Mode This mode is entered when the +VTR command is active in order to concurrently receive and transmit voice. 2.6.5 Tone Detectors The tone detector signal path is separate from the main received signal path thus enabling tone detection to be independent of the configuration status. In Tone Mode, all three tone detectors are operational. DSH-201722F 2012 Conexant Systems, Inc. 2-7 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.6.6 Speakerphone Mode (Optional) Speakerphone mode is controlled in voice mode with the following commands: Use Speakerphone After Dialing or Answering (+VSP=1). +VSP=1 selects speakerphone mode while in +FCLASS=8 mode. Speakerphone operation is entered during Voice Online Command mode after completing dialing or answering. Speakerphone Settings. The +VGM and +VGS commands can be used to control the microphone gain and speaker volume, respectively. VGM and +VGS commands are valid only after the modem has entered the Voice Online mode while in the +VSP=1 setting. 2.7 V.80 Synchronous Access Mode (SAM) V.80 Synchronous Access Mode between the modem and the host/DTE is provided for host-controlled communication protocols, e.g., H.324 video conferencing applications. Voice-call-first (VCF) before switching to a videophone call is also supported. 2.8 Full-Duplex Speakerphone (FDSP) Mode (Optional) The modem operates in FDSP mode when +FCLASS=8 and +VSP=1 (Section 2.6.6). In FDSP Mode, speech from a microphone or handset is converted to digital form, shaped, and output to the telephone line through the line interface circuit. Speech received from the telephone line is shaped, converted to analog form, and output to the speaker or handset. Shaping includes both acoustic and line echo cancellation. 2.9 Telephony Extensions The following telephony extension features are supported and are typically implemented in designs for set-top box applications to enhance end-user experience: Line-in-use detection Extension pick-up detection Remote hang-up detection The telephony extension features are enabled through the -STE command. The -TTE command can be used to adjust the voltage thresholds for the telephony extension features. 2.9.1 Line-in-Use Detection The line-in-use detection feature can stop the modem from disturbing the phone line when the line is already being used. When an attempt is made to dial using ATDT and the phone line is in use, the modem will not go off hook and will respond with the message "LINE IN USE". 2-8 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.9.2 Extension Pick-up Detection The extension pick-up detection feature (also commonly referred as PPD or Parallel phone detection) allows the modem to detect when another telephony device (i.e., fax machine, phone, satellite/cable box) is attempting to use the phone line. When an extension pick-up has been detected, the modem will go on-hook and respond with the message "OFF-HOOK INTRUSION". This feature can be used to quickly drop a modem connection in the event when a user picks up an extension phone line. For example, this feature allows set top boxes with an integrated CSM92-SP modem to give normal voice users the highest priority over the telephone line. 2.9.3 Remote Hang-up Detection The remote hang-up detection feature will cause the modem to go back on-hook and respond with the message "LINE REVERSAL DETECTED" during a data connection when the remote modem is disconnected for abnormal termination reasons (remote phone line unplugged, remote server/modem shutdown). 2.10 Point-of-Sales Support Point-of-Sales (POS) terminals usually need to exchange a small amount of data in the shortest amount of time. Low speed modulations such as Bell212A or V.22 are still mainly used in POS applications. Additionally, new non-standard sequences have been developed to better support POS applications. Industry standard and shortened answer tone B103 and V.21 are supported, as well as FastPOS (V.29) and V.22 FastConnect. POS terminal modulations are supported by the $F command. 2.11 Fax Class 1, Fax Class 1.0, and Fax Class 2 Operation Facsimile functions operate in response to fax class 1 commands when +FCLASS=1, to fax class 1.0 commands when +FCLASS=1.0, or to fax class 2 commands when +FCLASS=2. In the fax mode, the on-line behavior of the modem is different from the data (non-fax) mode. After dialing, modem operation is controlled by fax commands. Some AT commands are still valid but may operate differently than in data modem mode. Calling tone is generated in accordance with T.30. 2.12 Tone Detectors The modem is equipped with three tone detectors with separate signal paths from the main received signal path thus enabling tone detection to be independent of the configuration status. DSH-201722F 2012 Conexant Systems, Inc. 2-9 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 2.13 Call Waiting Tone Detection Call Waiting tones can be detected when in V.92, V.90, V.34, and V.32bis data modes. 2.14 Caller ID Both Type I Caller ID (On-Hook Caller ID) and Type II Caller ID (Call Waiting Caller ID) are supported for U.S. and many other countries (see Section 2.15). Both types of Caller ID are enabled/disabled using the +VCID command. Call Waiting Tone detection must be enabled using the +PCW command to detect and decode Call Waiting Caller ID. When enabled, caller ID information (date, time, caller code, and name) can be passed to the DTE in formatted or unformatted form. Inquiry support allows the current caller ID mode and mode capabilities of the modem to be retrieved from the modem. Type II Caller ID (Call Waiting Caller ID) detection operates only during data mode in V.92, V.90, V.34, V.32bis, or V.32. 2.15 Worldwide Country Support Internal modem firmware supports 63 country profiles (see Table 1-2). These country profiles include the following country-dependent parameters: Dial tone detection levels and frequency ranges. DTMF dialing parameters: Transmit output level, DTMF signal duration, and DTMF interdigit interval. Pulse dialing parameters: Make/break times, set/clear times, and dial codes are programmable. Ring detection frequency range. Type I and Type II Caller ID detection are supported for many countries. Contact your local Conexant sales office for additional country support. Blind dialing enabled/disable. Carrier transmit level. The maximum, minimum, and default values can be defined to match specific country and DAA requirements. Calling tone is generated in accordance with V.25. Calling tone may be toggled (enabled/disabled) by inclusion of a "^" character in a dial string. It may also be disabled. Frequency and cadence of tones for busy, ringback, congested, warble, dial tone 1, and dial tone 2. Answer tone detection period. Blacklist parameters. The modem can operate in accordance with requirements of individual countries to prevent misuse of the network by limiting repeated calls to the same number when previous call attempts have failed. Call failure can be detected for reasons such as no dial tone, number busy, no answer, no ringback detected, voice (rather than modem) detected, and key abort (dial attempt aborted by user). Actions resulting from such failures can include specification of minimum inter-call delay, extended delay between calls, and maximum numbers of retries before the number is permanently forbidden ("blacklisted"). The country profiles may be altered or customized by modifying the country-dependent parameters. Additional profiles may also be included. Additional and modified country profiles are supported by internal SRAM. 2-10 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Please contact an FAE at the local Conexant sales office for additional and modified country profile support. 2.16 Diagnostics Diagnostics are performed in response to test commands. Analog Loopback (&T1 Command). Data from the local DTE is sent to the modem, which loops the data back to the local DTE. PTT Signal Generation (%TTn Command). Continuous tones or modulation are generated by the DSP and output through the DAA. 2.17 Low Power Modes The modem enters a low power mode when no line connection exists and no host activity occurs for the period of time specified in the S24 register. The modem supports four low power modes: Idle Mode, Sleep Mode, Deep Sleep Mode, and Stop Mode. The low power mode entered depends on the setting of the -SLP command. 2.17.1 Idle Mode In Idle mode, the CPU and SPX clocks stop, and the SSD clock runs at low frequency. The modem can detect and qualify ring signals and process AT commands. The modem returns to normal mode upon receiving an AT command or receiving a qualified ring. 2.17.2 Sleep Mode In Sleep mode, the SPX clock stops, and the CPU and SSD clocks run at low frequency. The modem can detect and qualify ring signals. The modem cannot process AT commands. The modem can be awakened by the host sending a single (any) character (typically followed by an AT command) or by the modem receiving a qualified ring. 2.17.3 Deep Sleep Mode In Deep Sleep mode, the SPX and SSD clocks stop, and the CPU clock runs at low frequency. The modem can detect and qualify ring signals. The modem cannot process AT commands. The modem can be awakened by the host sending a single (any) character (typically followed by an AT command) or by the modem receiving a qualified ring. 2.17.4 Stop Mode In Stop mode, the CPU, SPX and SSD clocks stop. The modem cannot process AT commands and cannot detect and qualify ring signals. The modem can be awakened by the host sending a single (any) character (typically followed by an AT command). DSH-201722F 2012 Conexant Systems, Inc. 2-11 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet This page is intentionally blank. 2-12 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3. Hardware Interface 3.1 CX93021-2x Modem Hardware Interface Signals 3.1.1 CX93021-2x Modem Interface Signal Summary 3.1.1.1 LSD Interface (Through DIB) The DIB interface signals are: 3.1.1.2 DIBP DIBN Call Progress Speaker Interface The call progress speaker interface signal is: 3.1.1.3 Digital speaker output (DSPKOUT); output Clock Select Interface The clock select interface signal is: 3.1.1.4 Clock Select (CLKSEL); input Serial EEPROM Interface The 2-line serial interface signals to an optional serial EEPROM are: 3.1.1.5 Bidirectional Data input/output (NVMDATA) Clock output (NVMCLK) Serial DTE Interface and Indicator Outputs The supported DTE interface signals are: DSH-201722F Serial Transmit Data input (TXD#) Serial Receive Data output line (RXD#) Clear to Send output (CTS#) Received Line Signal Detector output (RLSD#) Ring Indicator output (RI#) Data Terminal Ready control input (DTR#) Request to Send control input (RTS#) Data Set Ready output (DSR#) 2012 Conexant Systems, Inc. 3-1 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.1.1.6 CX20452 Codec Interfaces The supported codec interface signals are: 3-2 Codec Clock output (IACLK). Codec Sleep Control output (IASLEEP). Codec Receive Data Serial input (SRIN). Codec Transmit Data Serial output (SROUT). Codec Shift Clock input (SRCLK). Codec Strobe input (SACLK). Codec Control output (SRCTL). 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.1.2 CX93021-2x Modem Pin Assignments and Signal Definitions CX93021-2x Modem hardware interface signals are shown by major interface in Figure 3-1, are shown by pin number in Figure 3-2, and are listed by pin number in Table 3-1. CX93021-2x Modem hardware interface signals are defined in Table 3-2. Figure 3-1. CX93021-2x Modem Hardware Interface Signals DSH-201722F 2012 Conexant Systems, Inc. 3-3 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet RESERVED RXD# RESET# XTLO XTLI DSPKOUT SRCTL SACLK SRCLK 36 35 34 33 32 31 30 29 28 Figure 3-2. CX93021-2x Modem 36-Pin QFN Pin Signals TXD# 1 27 VDD_CORE RESERVED 2 26 LPO VCC 3 25 VDD VDD 4 24 VCC IACLK 5 23 NVMDATA IASLEEP 6 22 SRIN NVMCLK/CLKSEL 7 21 SROUT RTS# 8 20 DIBP RESERVED 9 19 DIBN 10 11 12 13 14 15 16 17 18 DSR# CTS# RESERVED RESERVED DTR# MK4 RLSD# RI# RESERVED CX93021-2x GND (PADDLE), referred to as pin 37, is the connective surface located on the bottom of the package. Table 3-1. CX93021-2x Modem 36-Pin QFN Pin Signals Pin No. Pin No. 37 1 TXD# 19 2 RESERVED 20 3 VCC 21 4 VDD 22 5 IACLK 23 6 IASLEEP 24 7 NVMCLK/CLKSEL 25 8 RTS# 26 9 RESERVED 27 10 DSR# 28 11 CTS# 29 12 RESERVED 30 13 RESERVED 31 14 DTR# 32 15 MK4 33 16 RLSD# 34 17 RI# 35 18 RESERVED 36 Note: Pin 37 is the paddle on the bottom of the package. 3-4 Signal Name 2012 Conexant Systems, Inc. Signal Name GND (PADDLE) DIBN DIBP SROUT SRIN NVMDATA VCC VDD LPO VDD_CORE SRCLK SACLK SRCTL DSPKOUT XTLI XTLO RESET# RXD# RESERVED DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 3-2. CX93021-2x Modem Hardware Signal Definitions Label Pin I/O I/O Type Signal Name/Description System XTLI XTLO 32 33 I O Ix Ox Crystal In and Crystal Out. If an external 27 or 28.224 MHz crystal circuit is used instead of an external clock circuit, connect XTLI and XTLO to the external crystal circuit. When an external clock circuit is used, connect the clock signal to XTLI and leave XTLO open. (See CLKSEL pin description.) NVMCLK/CLKSEL 7 I Ipu/O2 Clock Frequency Select (CLKSEL). Clock frequency is selected by CLKSEL during reset processing. Leave open for 28.224 MHz operation; connect pin to digital ground (GND) through 10 k for 27.000 MHz operation. RESET# 34 I Ipu/O2 This signal is multiplexed with NVMCLK. Reset. The active low RESET# input resets the modem logic and clears the internal SRAM. RESET# low holds the modem in the reset state; RESET# going high releases the modem from the reset state. During application of VDD, RESET# must be held low before VDD power is applied and for at least 15 ms after VDD reaches operating range. The modem device set is ready to use 25 ms after the low-to-high transition of RESET#. Since some application may use external host GPIO to control RESET# signal, it will be necessary to have an external 20 k pull-down resistor on RESET# to ensure signal is low while applying VDD to the system. LPO 26 I VDD_CORE 27 O PWR +1.2V Internal Core Voltage Filter. Internal +1.2 V core voltage for decoupling. Do not connect this pin to an external +1.2 V power supply. VDD 4, 25 O PWR +3.3V I/O Circuits Voltage. Internal +3.3V I/O circuits voltage for decoupling. Do not connect this pin to an external +3.3 V power supply. VCC 3, 24 I PWR Digital Supply Voltage. Connect to +5V. GND (PADDLE) 37 I GND Digital Ground. Connect to digital ground (GND). MK4 15 I DSPKOUT 31 O Ipd/O2 Modem Speaker Digital Output. The DSPKOUT digital output reflects the received analog input signal digitized to TTL high or low level by an internal comparator. DIB Interface DIBN 19 O Odpc DIB Negative. Provides clock and power to the LSD, and transfers data, control and status information between the SSD and LSD. Connect to DIB transformer primary winding terminal. DIBP 20 O Odpc NVMCLK/CLKSEL 7 I/O Ipu/O2 NVMDATA 23 I/O Ipu/O2 Low Power Oscillator. Connect to +3.3V through 240 k. Control. Connect to digital ground (GND). Speaker Interface DIB Positive. Provides clock and power to the LSD and transfers data, control and status information between the SSD and LSD. Connect to DIB transformer primary winding terminal. NVRAM Interface NVRAM Clock (NVMCLK). During normal operation, NVMCLK/CLKSEL output high enables the EEPROM. Connect to EEPROM SCL pin. This signal is multiplexed with CLKSEL. DSH-201722F NVRAM Data. The NVMDATA pin supplies a serial data interface to the EEPROM. Connect to EEPROM SDA pin and to +3.3V through 10 K. 2012 Conexant Systems, Inc. 3-5 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 3-2. CX93021-2x Modem Hardware Signal Definitions (Continued) Label Pin I/O I/O Signal Name/Description Type V.24 (EIA/TIA-232-E) DTE Serial Interface TXD# 1 I Ipu/O2 Transmitted Data (EIA BA/ITU-T CT103). The DTE uses the TXD# line to send data to the modem for transmission over the telephone line or to transmit commands to the modem. RXD# 35 O Ipu/O2 Received Data (EIA BB/ITU-T CT104). The modem uses the RXD# line to send data received from the telephone line to the DTE and to send modem responses to the DTE. During command mode, RXD# data represents the modem responses to the DTE. CTS# 11 O Ipu/O2 Clear To Send (EIA CB/ITU-T CT106). CTS# output ON (low) indicates that the modem is ready to accept data from the DTE. In error correction or normal mode, CTS# is always ON (low) unless RTS/CTS flow control is selected by the &Kn command. RLSD# 16 O Ipu/O2 Received Line Signal Detector (EIA CF/ITU-T CT109). During normal operation, when AT&C0 command is not in effect, RLSD# output is ON when a carrier is detected on the telephone line or OFF when carrier is not detected. RI# 17 O Ipu/O2 Ring Indicator (EIA CE/ITU-T CT125). RI# output ON (low) indicates the presence of an ON segment of a ring signal on the telephone line. DTR# 14 I Ipu/O2 Data Terminal Ready (EIA CD/ITU-T CT108). The DTR# input is turned ON (low) by the DTE when the DTE is ready to transmit or receive data. DTR# ON prepares the modem to be connected to the telephone line, and maintains the connection established by the DTE (manual answering) or internally (automatic answering). DTR# OFF places the modem in the disconnect state under control of the &Dn and &Qn commands. RTS# 8 I Ipu/O2 Request To Send (EIA CA/ITU-T CT105). RTS# input ON (low) indicates that the DTE is ready to send data to the modem. In the command state, the modem ignores RTS#. The modem ignores RTS# unless RTS/CTS flow control is selected by the &Kn command. DSR# 10 O Ipu/O2 Data Set Ready (EIA CC/ITU-T CT107). DSR# indicates modem status to the DTE. DSR# OFF (high) indicates that the DTE is to disregard all signals appearing on the interchange circuits except Ring Indicator (RI#). DSR# output is controlled by the AT&Sn command. CX20452 Codec Interface for Speakerphone IACLK 5 O It/Ot2 Codec Clock. Connect to CX20452 CLKIN pin. IASLEEP 6 O Ot2 Codec Sleep Control. Connect to CX20452 SLEEP pin. SRIN 22 I Itk/Ot2 Codec Receive Serial Data. Connect to CX20452 RXOUT pin. SROUT 21 O Ot2 Codec Transmit Serial Data. Connect to CX20452 TXSIN pin. SRCLK 28 I Itpu/Ot2 Codec Shift Clock. Connect to CX20452 SCK pin. SACLK 29 I Itpu/Ot2 Codec Strobe. Connect to CX20452 STROBE pin. SRCTL 30 O It/Ot2 Codec Control. Connect to CX20452 CNTRL_SIN pin. Reserved RESERVED 2, 9, 12, 13, 18, 36 Reserved. Leave open. Note: I/O Types: See Table 3-3. 3-6 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.1.3 CX93021-2x Modem Electrical Characteristics CX93021-2x I/O types are defined in Table 3-3. CX93021-2x DC electrical characteristics are listed in Table 3-4. Table 3-3. CX93021-2x Modem I/O Type Definitions I/O Type Idd/Odd Ix/Ox Ipd/O2 Digital input/output, DIB data transceiver I/O, wire Ipu/O2 Digital input, 120 k pull-up / Digital output, 2 mA Ippu/O2 Digital input, Programmable 120 k pull-up / Digital output, 2 mA Digital output with adjustable drive, DIB clock and power Odpc Rx Description Digital input, 120 k pull-down / Digital output, 2 mA Oscillator Pad, place 120 k resistor from pad to VDD PWR Power GND Ground NOTES: 1. See DC characteristics in Table 3-4. 2. I/O Type corresponds to the device Pad Type. The I/O column in signal interface tables refers to signal I/O direction used in the application. Table 3-4. CX93021-2x Modem DC Electrical Characteristics Parameter Symbol Min. Max. Units Test Conditions Input Voltage Low Input Voltage High Input Current (no Pull-Down or Pull-Up) Input Current (Pull-Down) Input Current (Pull-Up) Output Voltage Low Output Voltage High Output Impedance VIL VIH IIL 0 0.7 * VDD -1 0.3 *VDD VDD +1 V V uA OEN = 1 IPD IPU VOL VOH Z +6 -300 0 VDD-0.4 25 +30 -60 0.4 VDD 95 uA uA V V VIN = VDD VIN = GND IOL = +2 mA IOL = -2 mA Pull-Up Resistance Rpu 120 500 k Pull-Down Resistance Rpd 120 500 VIN = GND VIN = VDD k Test Conditions unless otherwise stated: VCC = +5 0.25 VDC; TA = 0C to 70C; external load = 50 pF. DSH-201722F 2012 Conexant Systems, Inc. 3-7 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.2 CX20548 LSD Hardware Pins and Signals 3.2.1 General 3.2.1.1 Host Side Device (HSD) Interface (Through DIB) The DIB interface signals are: 3.2.1.2 DIB Positive (DIBP, pin 14); input/output DIB Negative (DIBN, pin 16); input/output Power and Ground The power and ground signals are: 3.2.1.3 Unregulated Power Output (PWR, pin 15) Regulated Digital Power Output (DVDD, pin 1) Regulated Analog Power Output (AVDD, pin 2) Analog Ground (PADDLE [AGND]); Analog ground Telephone Line Interface The telephone line interface signals are: 3.2.1.4 RING AC Coupled (RAC, pin 4); input TIP AC Coupled (TAC, pin 5); input Electronic Inductor Capacitor (EIC, pin 11) Electronic Inductor Output (EIO, pin 10) Electronic Inductor Feedback (EIF, pin 9) Receive Analog Input (RXI, pin 6); input Transmit Output (TXO, pin 8); output Transmit Feedback (TXF, pin 7); input Voltage References There is one reference voltage pin: 3.2.1.5 Output Middle (Center) Reference Voltage (VC, pin 3); output for decoupling General Purpose Input/Output There is one unassigned general purpose input/output pin: 3-8 General Purpose Input/Output (GPIO, pin 13); input/output 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.2.2 Pin Assignments and Signal Definitions CX20548 LSD hardware interface signals are shown by major interface in Figure 3-3, are shown by pin number in Figure 3-4, and are listed by pin number in Table 3-5. Note: Pin 17 is shown in Figure 3-3 to ensure that the PADDLE is considered when laying out the printed circuit board. The PADDLE is the analog ground pin of the CX20548 device and must be connected to LSD analog ground (AGND_LSD) when the CX20548 is populated in a PCB. CX20548 LSD hardware interface signals are defined in Table 3-6. CX20548 LSD GPIO DC characteristics are specified in Table 3-7. CX20548 LSD AVDD DC characteristics are specified in Table 3-8. Figure 3-3. CX20548 LSD Hardware Interface Signals C850 DIGITAL ISOLATION BARRIER (DIB) RAC 16 DIBN TAC R802 4 R804 5 DIBN C862 14 DIBP DIBP EIC EIO EIF T802 C852 R854 2 TEST AGND_LSD 1 DVDD C830 AGND_LSD 15 2 C870 Electronic Inductor, OffHook, Pulse Dial, and TIP and RING VI Control 11 10 9 CX20548 SmartDAA 4 Line Side Device (LSD) 16-Pin QFN RXI Safety and EMI Protection Telephone Line Connector TIP RING Receive Coupling 6 AGND_LSD TXO TXF Impedance Matching and Transmitter 8 7 PWR+ AVDD VC C828 3 C844 AGND_LSD AGND_LSD 17 GPIO 13 NC PADDLE (AGND) AGND_LSD NOTES: 1. Consult applicable reference design for exact component placement and values, and for layout guidelines. 2. The PADDLE (indicated as Pin 17) is the analog ground pin of the CX20548 device and must be connected to LSD analog ground (AGND_LSD) when the CX20548 is populated in a printed circuit board (PCB). DSH-201722F 2012 Conexant Systems, Inc. 3-9 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet DIBN PWR DIBP GPIO 16 15 14 13 Figure 3-4. CX20548 LSD 16-Pin QFN Pin Signals DVDD 1 12 TEST AVDD 2 11 EIC VC 3 10 EIO RAC 4 9 EIF 5 6 7 8 TAC RXI TXF TXO CX20548 The PADDLE, a connective surface located on the bottom of the package and referred to as pin 17, is connected internally to analog ground (AGND). Table 3-5. CX20548 LSD 16-Pin QFN Pin Signals Pin 3-10 Signal Label Pin Signal Label 1 DVDD 9 EIF 2 AVDD 10 EIO 3 4 VC RAC 11 12 EIC TEST 5 TAC 13 GPIO 6 RXI 14 DIBP 7 TXF 15 PWR 8 TXO 16 17 DIBN PADDLE (AGND) 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 3-6. CX20548 LSD Hardware Signal Definitions Label Pin I/O I/O Type Signal Name/Description System Interface Signals PWR Unregulated Power Output. Unregulated power output from the internal rectifier, connect to AGND_LSD through C870. REF Output Middle Reference Voltage. Connect to AGND_LSD through C844, which must be placed close to pin 3. Use a short path and a wide trace to AGND_LSD pin. PWR Analog Power Output. Provides external connection point for decoupling. (AVDD is routed internally to LSD analog circuits.). Connect to AGND_LSD through C828. C828 must be placed close to pins 2. PWR Digital Power Output. Provides external connection point for decoupling. Connect to AGND_LSD through C830. Place C830 near pin 1. AGND_LSD Paddle Analog Ground. The conductive surface located on the bottom of the package and referred to as pin 17 is connected internally to device analog ground. Connect to AGND_LSD. PWR 15 PWR VC 3 REF AVDD 2 PWR DVDD 1 PWR PADDLE (AGND) 17 AGND_LSD DIBP 14 I/O I/O DIB Positive. Positive terminal of DIB, connect to secondary of DIB transformer. DIBN 16 I/O I/O DIB Negative. Negative terminal of DIB, connect to secondary of DIB transformer. RAC TAC 4 5 I I EIC 11 O EIO 10 O EIF 9 I RXI 6 I TXO 8 O TXF 7 I DIB Interface Signals TIP and RING Interface Signals RING AC Coupled and TIP AC Coupled. Un-rectified voltage from telephone line used to detect ring. Connect RAC to the diode bridge AC node (RING) through R802 (connects to pin 4). Connect TAC to the diode bridge AC node (TIP) through R804 (connects to pin 5). Oa Electronic Inductor Capacitor. Electronic inductor filtering capacitor. Connect to AGND_LSD through C858. Oa Electronic Inductor Output. Calculated voltage is applied to this output to control off-hook and DC VI mask operation. Connect to base of Q804. Ia Electronic Inductor Feedback. Connect to emitter of Q804 through R826. Ia Receive Analog Input. Receiver operational amplifier inverting input. AC coupled to the Bridge_CC node through R810 (connects to pin 6) and C810 in series. R810 and C810 must be placed very close to pin 6. The length of the PCB trace connecting R810 to the RXI pin must be kept at an absolute minimum. Oa Transmit Output. Outputs transmit signal and impedance matching signal; connect to base of transistor Q802. Ia Transmit Feedback. Connect to emitter of transistor Q802. Ia a Not Used GPIO 1 I/O It/Ot12 General Purpose I/O. Leave open if not used. Notes: 1. I/O types*: Ia Analog input It Digital input* Oa Analog output Ot12 Digital output* AGND_LSD Isolated LSD Analog Ground (isolated from the host system ground) *See Section CX20548 LSD GPIO DC Electrical Characteristics (Table 3-7). 2. Refer to applicable reference design for exact component placement and values. DSH-201722F 2012 Conexant Systems, Inc. 3-11 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 3-7. CX20548 LSD GPIO DC Electrical Characteristics Parameter Symbol Min. Typ. Max. Units Input Voltage VIN -0.30 - 3.465 V Input Voltage Low VIL - - 1.0 V Input Voltage High VIH 1.6 - - V Output Voltage Low VOL VOH 0 - 0.33 V 2.97 - - V Output Voltage High Test Conditions DVDD = +3.465V Input Leakage Current - -10 - 10 A Output Leakage Current (High Impedance) - -10 - 10 A GPIO Output Sink Current at 0.33 V maximum - 2.4 - mA GPIO Output Source Current at 2.97 V - 2.4 - mA minimum GPIO Rise Time/Fall Time 20 100 ns Test Conditions unless otherwise stated: DVDD = +3.3V +5%; TA = 0C to 70C; external load = 50 pF Table 3-8. CX20548 LSD AVDD and DVDD DC Electrical Characteristics PWR Input +3.3 V < PWR < +4.5 V AVDD Output +3.3 V 5% PWR must be at least 100mV higher than AVDD. See PWR, AVDD, and DVDD descriptions in Table 3-6. 3-12 DVDD Output +3.0 V 5% 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.3 CX20452 Codec Hardware Interface Signals 3.3.1 CX20452 Codec Pin Assignments and Signal Definitions The CX20452 Codec hardware interface signals for a typical speakerphone application are shown in Figure 3-5. The CX20452 Codec pin assignments are shown in Figure 3-6 and are listed in Table 3-9. The CX20452 Codec hardware interface signals are described in Table 3-10. Figure 3-5. CX20452 Codec Hardware Interface Signals +3.3 V + C7 10 F C8 .1 F DGND +3.3 V + C9 .1 F 12 20 L1 10 uH C10 10 F VDD VDD RELAYA LINE_OUTP LINE_OUTM AGND 4 AGND SRCTL IACLK CX93021-2x Modem S ROUT SRCLK SRIN SACLK IASLEEP 13 14 15 16 17 18 1 30 5 21 28 17 29 6 LINE_IN AVDD CNTRL_SIN CLKIN TXSIN SCK RXOUT STROBE SLEEP 7 11 NC NC NC NC 2 0.1 F MIC_IN VC 3 RESET# 6 1 F SPKR_OUT CX20452 Codec R11 100 K 19 10 9 POR + C13 10 F C16 .1 F VREF DGND NC NC 24 23 22 DGND DSH-201722F C14 .1 F 8 NC + C17 10 F D_LPBK_BAR VSS VSUB AVSS C18 .1 F 21 5 AGND 2012 Conexant Systems, Inc. 3-13 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet NC D_LPBK_BAR VSS VSUB VDD RELAYA 24 23 22 21 20 19 Figure 3-6. CX20452 Codec 24-Pin QFN Pin Signals SLEEP 1 18 STROBE SPKR_OUT 2 17 RXOUT POR 3 16 SCK AVDD 4 15 TXSIN AVSS 5 14 CLKIN LINE_OUTP 6 13 CNTRL_SIN 9 10 11 12 VC LINE_IN VDD 8 VREF MIC_IN 7 LINE_OUTM CX20452 Table 3-9. CX20452 Codec 24-Pin QFN Pin Signals Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 3-14 Signal Name SLEEP SPKR_OUT POR AVDD AVSS LINE_OUTP LINE_OUTM VREF VC MIC_IN LINE_IN VDD Pin No. 13 14 15 16 17 18 19 20 21 22 23 24 2012 Conexant Systems, Inc. Signal Name CNTRL_SIN CLKIN TXSIN SCK RXOUT STROBE RELAYA VDD VSUB VSS D_LPBK_BAR NC DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 3-10. CX20452 Codec Hardware Signal Definitions Signal Name Pin No. I/O Type Signal Description Power and Ground VDD 12, 20 PWR Digital Power Supply. Connect to 3.3 V and to digital circuits power supply filter. AVDD 4 PWR Analog Power Supply. Connect to 3.3 V and to analog circuits power supply filter. VSS 22 GND Digital Ground. Connect to GND. AVSS 5 AGND Analog Ground. Connect to AGND. Control POR 3 IPU Power-On Reset In. Active low reset input. Connect to reset circuit and to CX93021-2x RESET# pin. D_LPBK_BAR 23 IPU Digital Loopback Control. Active low input asserted to loopback DAC to SINC. Used for factory test only. Leave open for normal operation. CX93021-2x Interface CLKIN 14 IPD Clock Input. Connect to CX93021-2x IACLK pin. SLEEP 1 IPD Sleep Control Input. Active low input asserted to power down the CX20452 Codec. CX93021-2x IASLEEP pin. RXOUT 17 O Receive Data Serial Output. Connect to CX93021-2x SRIN pin. TXSIN 15 IPD Transmit Data Serial Input. Connect to CX93021-2x SROUT pin. SCK 16 O Shift Clock Output. Connect to CX93021-2x SRCLK pin. STROBE 18 O Strobe Output. Connect to CX93021-2x SACLK pin. CNTRL_SIN 13 IPD Control Input. Connect to CX93021-2x SRCTL pin. Microphone and Speaker Interface MIC_IN 10 IA Microphone Input. Single-ended analog data input from the microphone circuit. SPKR_OUT 2 OA Analog Speaker Output. The SPKR_OUT analog output reflects the selected analog signal. When the speaker is turned off, SPKR_OUT is clamped to the voltage at the VC pin. The SPKR_OUT output can drive an impedance as low as 150 . Line Interface (Not Used) RELAYA 19 OD Relay A Control. Leave open. LINE_OUTP 6 OA Line Output Plus. Single-ended analog data output. Leave open. LINE_OUTM 7 OA Line Output Minus. Single-ended analog data output. Leave open. LINE_IN 11 IA Line Input. Single-ended analog data input. Leave open. Reference VREF 8 OA Analog Reference Voltage. 0. 5 V nom. Connect to AGND through 10 F (polarized, + terminal to VREF) and 0.1 F (ceramic) in parallel. Position these capacitors very close to the VREF pin. Use a short path and a wide trace to AGND pin. VC 9 OA Analog Reference Voltage. 1.5 V nom. Connect to AGND through 10 F (polarized, + terminal to VC) and 0.1 F (ceramic) in parallel. Position these capacitors very close to the VC pin. Use a short path and a wide trace to AGND pin. VSUB 21 GND Digital Substrate Pin. Connect to AGND. No Connect NC Notes: 1. I/O types*: I O OD IA OA PWR AGND GND 24 -- No Internal Connection. Leave open. Digital Input: CMOS receiver, IPD = 130 k pull-down, IPU = 130 k pull-up Digital Output: CMOS driver, 2 mA, 120 Digital Output: CMOS driver, open drain Analog Input: Analog receiver Analog Output: Analog driver Power Analog ground Digital ground *See DC Electrical Characteristics (Table 3-11) and Analog Electrical Characteristics (Table 3-12). DSH-201722F 2012 Conexant Systems, Inc. 3-15 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.3.2 CX20452 Codec Electrical Characteristics CX20452 Codec DC electrical characteristics are listed in Table 3-11. CX20452 Codec analog electrical characteristics are listed in Table 3-12. Table 3-11. CX20452 Codec DC Electrical Characteristics Parameter Input high voltage Input low voltage Output high voltage Output low voltage Input leakage current Symbol VIH VIL VOH VOL IIN Min 0.4 * VDD -0.3 0.8 * VDD -- -- Max VDD + 0.3 0.2 * VDD VDD 0.4 10 Unit V V V V IOUT -- 10 A Output leakage current A Notes: Applies to types I and O unless otherwise indicated. All voltages referenced to ground (VSS). Currents are positive when flowing into the device. Table 3-12. CX20452 Codec Analog Electrical Characteristics Parameter Symbol SNR Min. -- Typ. 72 Max. -- Unit dB DAC to Speaker Driver output at -10 dBm, 150 Line input to ADC at -10 dBm Input leakage current SNR -- 72 -- dB SNR IIN -- -- 80 -- -- dB 10 A Output leakage current IOUT -- -- 10 A DAC to Line Driver output at -10 dBm, 600 3-16 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.4 Operating Conditions, Absolute Maximum Ratings, and Power Requirements The CX93021-2x and CX20452 operating conditions are specified in Table 3-13. The CX93021-2x and CX20452 absolute maximum ratings are listed in Table 3-14. The CX93021-2x current and power requirements are listed in Table 3-15. The CX20452 current and power requirements are listed in Table 3-16. Table 3-13. CX93021-2x Modem and CX20452 Codec Operating Conditions Parameter Symbol CX93021-2x Supply Voltage VCC CX20452 Digital Supply Voltage VDD CX20452 Analog Supply Voltage AVDD Operating Ambient Temperature TA Note: Voltages referenced to ground (VSS). DSH-201722F 2012 Conexant Systems, Inc. Limits +4.75 to +5.25 +3.0 to +3.6 +3.0 to +3.6 0 to +70 Units VDC VDC VDC C 3-17 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 3-14. Absolute Maximum Ratings Parameter Storage Temperature Range Relative humidity CX93021-2x VCC Supply Voltage Input Voltage Voltage Applied to Outputs in High Impedance (Off) State DC Input Clamp Current DC Output Clamp Current Static Discharge Voltage (25C) Latch-up Current (25C) Symbol Common T STG HREL CX93021-2x Modem VCC VIN VHZ IIK IOK VESD ITRIG CX20452 Codec Analog Supply Voltage (+3.3 V operation) AVDD Digital Supply Voltage (+3.3 V operation) VDD Digital Input Voltage VIN Analog Input Voltage VIN DC Input Clamp Current IIK DC Output Clamp Current IOK Static Discharge Voltage (25C) VESD Latch-up Current (25C) ITRIG Limits Units -55 to +125 C Up to 90% noncondensing, or a wet bulb temperature up to 35 C, whichever is less. -0.5 to +6.0 -0.5 to VDD + 0.5 -0.5 to +5.5 VDC VDC VDC 20 20 2500 400 mA mA VDC mA -0.3 to +4.6 -0.3 to +4.6 -0.3 to (VDD + 0.3) -0.3 to + (AVDD + 0.3) 10 10 2500 150 V V V V mA mA V mA Handling CMOS Devices The device contains circuitry to protect the inputs against damage due to high static voltages. However, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltage. An unterminated input can acquire unpredictable voltages through coupling with stray capacitance and internal cross talk. Both power dissipation and device noise immunity degrades. Therefore, all inputs should be connected to an appropriate supply voltage. Input signals should never exceed the voltage range from -0.5V to (VDD + 0.5) V. This prevents forward biasing the input protection diodes and possibly entering a latch up mode due to high current transients. 3-18 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 3-15. CX93021-2x Current and Power Requirements Mode Typical Current (mA) 75 87 16 16 7 5 Maximum Current (mA) 85 97 23 23 13 11 Typical Power (mW) 375 435 80 80 35 25 Maximum Power (mW) 446 509 120 120 68 58 Typical Current (Ityp) VDD 0.5 mA Maximum Current (Imax) Typical Power (Ptyp) Maximum Power (Pmax) Normal Mode: On-hook, Idle, waiting for ring Normal Mode: Off-hook, normal data connection Idle Mode (-SLP=0) Sleep Mode (-SLP=1) Deep Sleep Mode (-SLP=2) Stop Mode (-SLP=3) Notes: o 1. Test conditions: VCC = +5.0V for typical values; VCC = +5.25V for maximum values. Temperature = 25 C. 2. Ptyp = Ityp * 5.0V; Pmax = Imax * 5.25V. 3. Input Ripple 0.1 Vpeak-peak. Table 3-16. CX20452 Codec Current Requirements Mode Operating Sleep Operating Sleep 1.65 mW < 0.3 A AVDD 2.7 mA 1 W 8.9 mW 0.6 A 1.98 W Notes: 1. Test conditions: VDD = AVDD = +3.3V for typical values; VDD = AVDD = +3.6V for maximum values. 2. Input Ripple 0.1 Vpeak-peak. DSH-201722F 2012 Conexant Systems, Inc. 3-19 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 3.5 Crystal and Clock Specifications Crystal specifications are listed in Table 3-17. Clock specifications are listed in Table 3-18. Table 3-17. Crystal Specifications Characteristic Frequency Calibration Tolerance Frequency Stability vs. Temperature Frequency Stability vs. Aging Oscillation Mode Calibration Mode Load Capacitance, C L Shunt Capacitance, C O Series Resistance, R 1 Drive Level Operating Temperature Storage Temperature Value 28.224 or 27.000 MHz nominal 50 ppm at 25C (C = 16.5 and 19.5 pF) L 35 ppm (0C to 70C) 20 ppm/5 years Fundamental Parallel resonant 18 pF nom. 7 pF max. 35-60 max. @20 nW drive level 100 W correlation; 500 W max. 0C to 70C -40C to 85C Table 3-18. Clock Specifications Characteristic Type Frequency Level Duty Cycle Stability Value Square wave 28.224 or 27.000 MHz nominal 3.3 Vp-p 0.3 V zero offset 50 10 % 50 ppm . 3-20 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 4. Package Dimensions The 36-pin QFN package dimensions are shown in Figure 4-1. The 24-pin QFN package dimensions are shown in Figure 4-2. The CX93021-2x comes in a 16-pin QFN package, in either punch or sawn style. Both are electrically equivalent and share the same footprint. Table 4-1 provides a dimension table that is common to both QFN styles. The punch-style package is shown in Figure 4-3, and the sawn-style package is shown in Figure 4-4. DSH-201722F 2012 Conexant Systems, Inc. 4-1 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Figure 4-1. Package Dimensions for 36-Pin QFN 10 2X 0.10 C 0.10 A 0.05 4 C 13 0.10 0.05 b A D A C M M CA B C A1 D/2 D2 A2 D1 0.10 C D2/2 4X P A3 2X D1/2 36 36 B SEE DETAIL "A" FOR PIN #1 ID AND TIE BAR MARK OPTION PIN#1 ID R0.20 4X P 6 1 0.60 DIA. 2 5 1 0.45 E1/2 2 E/2 3 3 E1 E E2 4.0 REF. E2/2 (MIN. 0.35) 0.10 L C B 2X 0 B 0.10 C C A C CL BOTTOM VIEW C CL 4 e 4.0 REF. SIDE VIEW TOP VIEW 2X (MIN. 0.35) e SEATING PLANE e b A1 11 S CA LE : N ON E TE R MIN AL TIP FOR ODD TERMINAL/SIDE FOR EVEN TERMINAL/SIDE SECTION "C-C" S Y M B O L NOTES: 1. NOT APPLICABLE . 2. DIMENSIONING & TOLERANCES CONFORMTO ASME Y14.5M. - 1994. 3. N IS T HE NUMBER OF T ERMINA LS. Nd IS THE NUMBER OF T ERMINA LS IN X-DIRECT ION . Ne IS THE NUMBER OF T ERMINA LS IN Y-DIRECT ION. 4. DIMENSION b APPLIESTO PLATED TERMINAL AND IS ME ASURED BETWEEN 0.20 AND 0.25mm R F OM TERMINAL TIP. 5. THE PIN #1 IDENTIFIER (INDEN TATION MARK OROTHER FEATURE). 6. EXACT SHAPE AND SIZE OF T HIS FE ATURE IS OPT IONAL . 7. ALL DIMENSIONS ARE IN MILLIMETERS. 8. THE SHAPE S HOWN ON FOUR CORNERS ARE NOT ACTUAL I/O. 9. PACKAGE WARPAGE IS 0.05mm MAXIMUM. 10. APPLIED FOR EXPOSED PAD AND TERMINALS. EXCLUDE EMBEDDING PART OF EXPOSEDPAD FROM MEASURING. 11. APPLIED ONLY FOR T ERMINALS. 12. Q AND R APPLIES ON LY FORSTRAIGHT TIEBAR SHAPES. A A1 A2 A3 D D1 E E1 0 P R e N Nd Ne L b Q D2 E2 DIMENSIONS (mm) N O MIN. NOM. 0.0 0 - 0.85 0.01 0.65 0.20 REF. 6.00 BSC 5.75 BSC 6.00 BSC 5.75 BSC 0.24 0.13 0.42 0.17 0.50 0.18 0.30 3.95 3.95 0.50 BSC 36 9 9 0.60 0.23 0.40 4.10 4.10 T MAX. 0.90 0.05 0.70 12 0.60 0.23 E 11 12 3 3 3 0.75 0.30 0.65 4.25 4.25 4 12 36-PIN 6x6mm QFN_(REF: 45278_PVC_EPVC) POD_36QFN_6x6mm_P VC_EPVC (05-1499ill ) 4-2 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Figure 4-2. Package Dimensions for 24-Pin QFN 2X 0.10 C A D A 10 D/2 0.05 D1 C 4 4X P b A A1 D1/2 A2 2X 0.10 N C 0.10 M D2/2 PIN1 ID 0.20 R. A3 B C A B D2 N 4X P 5 6 1 0.50 DIA. 1 E/2 E1/2 0.45 2 3 E1 2 (Ne-1)Xe 3 E E2 RE F. E2/2 0.25 MIN. L 0.10 C B 2X 0 B 0.10 C 0.25 MIN. e C A SEATING PLANE 2X TOP VIEW (Nd-1)Xe RE F. SIDE VIEW C C CL b 4 SCALE: NONE e TERMIN AL TIP A1 SEC TION "C-C" NOTES: 1. NOT APPLIC ABLE. 2. DIMENSION ING &TOLER ANCES C ONFORMTO ASME Y 14.5M. - 1994. 3. N IS THE NUMBER OF TERMINALS. Nd IS THE NU MBER OF TERMIN ALS IN X-D IRECTION & Ne IS THE NU MBER OF TERMIN ALS INY-DIR ECTION. 4. DIMENSION b APPLIESTO PLATED TERMINAL AND IS MEASURED BETWEEN 0.20 AND 0.25mm FR OM TERMINA L TIP. 5. THE PIN #1 IDENTIFIER. 11 BOTTOM VIEW S Y M B O L A A1 A2 A3 e N Nd Ne L b D D1 E E1 D2 E2 0 P DIMENSIONS N O MIN. NOM. 0.00 - 0.85 0.01 0.65 0.20 REF. 0.50 BSC 24 6 6 0.40 0.23 0.30 0.18 2.35 2.35 0.24 4.00 BSC 3.75 BSC 4.00 BSC 3.75 BSC 2.50 2.50 0.42 MAX. 0.90 0.05 0.70 T E 11 3 3 3 0.50 0.30 4 2.65 2.65 12 0.60 6. EXACT SHAPE AND SIZE OF THIS FE ATUR E IS OPTIONAL. 7. ALL DIMENSIONS AR E IN MILLIMETERS. 8. THE SHAPES SHOWN ON FOUR CORNER S ARE NO T ACTUAL I/O. 9. PACKAGE WARPAGE MAX 0.05mm. 10. APPLIED F OR EXPOSEDPAD AND TER MINALS. 11. APPLIED ONLY FOR TERMINALS. PD_24QFN DSH-201722F 2012 Conexant Systems, Inc. 4-3 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Table 4-1. Common Table for 16-QFN Punch and Sawn Style Package Dimensions Dim. Minimum e Nominal Maximum Note 0.65 BSC L 0.5 0.75 b 0.21 0.35 D2 1.95 2.10 2.25 E2 1.95 2.10 2.25 A 0.8 1.00 A1 0.00 0.05 A3 0.20 REF. D 4.00 BSC D1 3.75 BSC E 4.00 BSC E1 3.75 BSC (1) (2) (2) General Notes: 1. All dimensions in mm. 2. Shape of Pin #1 indicator on the bottom of package can be different (i.e., Chamfer or Half Circle). Footnotes: (1) Dimension b applies to plated terminal and is measured between 0.20 and 0.30 mm from terminal tip. (2) This dimension is applied only for Punched QFN. 4-4 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Figure 4-3. Package Dimensions for 16-Pin QFN, Punch Style Figure 4-4. Package Dimensions for 16-Pin QFN, Sawn Style DSH-201722F 2012 Conexant Systems, Inc. 4-5 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet 5. Recommended QFN Surface Mount Land Pattern The recommended surface mount land patterns based on the IPC-SM-782 standard for board layout are shown in Figure 5-1 for the 36-pin QFN, Figure 5-2 for the 24-pin QFN, and Figure 5-3 for the 16-pin QFN. Figure 5-1. Recommended Surface Mount Land Pattern for 36-Pin QFN DSH-201722F 2012 Conexant Systems, Inc. 5-1 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Figure 5-2. Recommended Surface Mount Land Pattern for 24-Pin QFN 5-2 2012 Conexant Systems, Inc. DSH-201722F CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet Figure 5-3. Recommended Surface Mount Land Pattern for 16-Pin QFN DSH-201722F 2012 Conexant Systems, Inc. 5-3 CX93021-2x CSM92-SP V.92 Controllered Serial Modem with Speakerphone Data Sheet This page is intentionally blank. 5-4 2012 Conexant Systems, Inc. DSH-201722F NOTES www.conexant.com General Information: U.S. and Canada: (888) 855-4562 International: (949) 483-4600 Headquarters - Newport Beach 4000 MacArthur Blvd. Newport Beach, CA 92660