To all our customers Regarding the change of names mentioned in the document, such as Mitsubishi Electric and Mitsubishi XX, to Renesas Technology Corp. The semiconductor operations of Hitachi and Mitsubishi Electric were transferred to Renesas Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.) Accordingly, although Mitsubishi Electric, Mitsubishi Electric Corporation, Mitsubishi Semiconductors, and other Mitsubishi brand names are mentioned in the document, these names have in fact all been changed to Renesas Technology Corp. Thank you for your understanding. Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been made to the contents of the document, and these changes do not constitute any alteration to the contents of the document itself. Note : Mitsubishi Electric will continue the business operations of high frequency & optical devices and power devices. Renesas Technology Corp. Customer Support Dept. April 1, 2003 USB DEVICE CONTROLLER M66291GP Ver.1.0 Apr.9 2001 Notice This is not a final specification. Some parametric items are subject to change. MITSUBISHI ELECTRIC CORPORATION How to Read Register Tables Bit Numbers : Each register is connected with an internal 16-bit wide data bus, so the bit numbers of the registers located at odd addresses are b15-b8, and those at even addresses are b7-b0. State of Register at Reset : Represents the initial state of each register immediately after reset with hexadecimal numbers. The "H/W reset" is the reset by an external reset signal; the "S/W reset" is the reset by the USBE bit of the USB Operation Enable Register. ... Read enabled At Read: ? ... Read disabled (Read value invalid) 0 ... Read always as 0 1 ... Read always as 1 ... Write enabled At Write: ... Write enable conditionally (includes some conditions at write) -- ... Write disabled (Don't care "0" and "1" at write) X *** Write disabled <Example of representation> Not implemented in the shaded portion. b15 R H/W reset S/W reset USB bus reset 0 0 0 14 13 12 Abit Bbit Cbit 0 0 0 0 0 0 0 0 0 11 10 9 8 7 6 5 4 3 2 1 <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> b Bit name 15 Reserved. 14 A bit 0: ------------------------ (------------------------) 1: ------------------------ B bit 0: ------------------------ (------------------------) 1: ------------------------ C bit 0: ------------------------ (------------------------) 1: ------------------------ 13 12 Function R W 0 - 0 0 0 0 0 0 b0 MITSUBISHI <DIGITAL ASSP> M66291GP Contents CONTENTS 1. M66291 OVERVIEW ...................................................................................................................................... 1 1.1 Features ...................................................................................................................................................... 1 1.2 Block Diagram ............................................................................................................................................. 3 1.2.1 USB-IP ................................................................................................................................................. 4 1.2.2 Bus Interface Unit (BIU) ....................................................................................................................... 4 1.2.3 FIFO Memory ....................................................................................................................................... 4 1.2.4 I/O Block............................................................................................................................................... 4 1.3 Pin Functions .............................................................................................................................................. 6 2. Registers ....................................................................................................................................................... 8 2.1 2.2 2.3 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 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 2.35 2.36 2.37 2.38 2.39 2.40 3. USB Operation Enable Register ............................................................................................................... 10 Remote Wakeup Register ......................................................................................................................... 12 Sequence Bit Clear Register..................................................................................................................... 13 USB_Address Register ............................................................................................................................. 14 Isochronous Status Register ..................................................................................................................... 15 SOF Control Register................................................................................................................................ 16 Polarity Set Register ................................................................................................................................. 17 Interrupt Enable Register 0 ....................................................................................................................... 20 Interrupt Enable Register 1 ....................................................................................................................... 23 Interrupt Enable Register 2 ....................................................................................................................... 24 Interrupt Enable Register 3 ....................................................................................................................... 25 Interrupt Status Register 0 ........................................................................................................................ 26 Interrupt Status Register 1 ........................................................................................................................ 32 Interrupt Status Register 2 ........................................................................................................................ 34 Interrupt Status Register 3 ........................................................................................................................ 35 Request Register ...................................................................................................................................... 36 Value Register........................................................................................................................................... 37 Index Register ........................................................................................................................................... 38 Length Register......................................................................................................................................... 39 Control Transfer Control Register ............................................................................................................. 40 EP0 Packet Size Register ......................................................................................................................... 42 Automatic Response Control Register...................................................................................................... 43 EP0_FIFO Select Register........................................................................................................................ 44 EP0_FIFO Control Register ...................................................................................................................... 46 EP0_FIFO Data Register .......................................................................................................................... 50 EP0 Continuous Transmit Data Length Register ...................................................................................... 51 CPU_FIFO Select Register ....................................................................................................................... 52 CPU_FIFO Control Register ..................................................................................................................... 54 CPU_FIFO Data Register ......................................................................................................................... 58 SIE_FIFO Status Register......................................................................................................................... 59 Dn_FIFO Select Registers (n=0~1) .......................................................................................................... 61 Dn_FIFO Control Registers (n=0~1)......................................................................................................... 65 Dn_FIFO Data Registers (n=0~1) ............................................................................................................. 67 DMAn_Transaction Count Registers (n=0~1)........................................................................................... 68 FIFO Status Register ................................................................................................................................ 69 Port Control Register................................................................................................................................. 70 Port Data Register..................................................................................................................................... 72 Drive Current Adjust Register ................................................................................................................... 73 EPi Configuration Registers 0 (i=1~6) ...................................................................................................... 74 Epi Configuration Registers 1 (i=1~6)....................................................................................................... 77 M66291 OPERATIONS................................................................................................................................ 79 3.1 Interrupt Function ...................................................................................................................................... 79 3.2 FIFO Buffer ............................................................................................................................................... 81 3.2.1 FIFO Buffer Configuration .................................................................................................................. 81 USB - i Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP Contents 3.2.2 Buffer Access ..................................................................................................................................... 81 3.2.3 Buffer State and IVAL Bit ................................................................................................................... 82 3.2.4 IVAL Bit and EPB_RDY Bit ................................................................................................................ 84 3.3 USB Data Transfer Function Overview..................................................................................................... 85 3.3.1 Data Receive Function ....................................................................................................................... 85 3.3.2 Data Transmit Function ...................................................................................................................... 85 3.3.3 Data Transfer Sequence .................................................................................................................... 85 3.3.4 DMA Transfer Overview..................................................................................................................... 86 3.3.5 DMA Transfer Method ........................................................................................................................ 86 3.4 Control Transfer Overview ........................................................................................................................ 88 3.5 Enumeration .............................................................................................................................................. 95 3.5.1 FIFO Buffer Management .................................................................................................................. 96 3.5.2 Cautions at FIFO Data Access........................................................................................................... 96 3.5.3 CPU Interface Bus Width Selection ................................................................................................... 97 3.5.4 Combination of CPU Interface Input Pins .......................................................................................... 97 3.5.5 Register Data Access......................................................................................................................... 98 3.5.6 Clock .................................................................................................................................................. 99 4. ELECTRICAL CHARACTERISTICS ......................................................................................................... 100 4.1 Absolute Maximum Ratings .................................................................................................................... 100 4.2 Recommended Operating Conditions..................................................................................................... 100 4.3 Electrical Characteristics (IOVcc=2.7~3.6V,CoreVcc=3.0~3.6V) ........................................................... 101 4.4 Electrical Characteristics (IOVcc=4.5~5.5V,CoreVcc=3.0~3.6V) ........................................................... 103 4.5 Electrical Characteristics (D+/D-)............................................................................................................ 105 4.5.1 DC Characteristics ........................................................................................................................... 105 4.5.2 AC Characteristics............................................................................................................................ 105 4.6 Switching Characteristics (IOVcc=2.7~3.6V or 4.5~5.5V) ...................................................................... 106 4.7 Timing Requirements (IOVcc=2.7~3.6V or 4.5~5.5V) ............................................................................ 107 4.8 Measurement circuit................................................................................................................................ 108 4.8.1 Pins except for USB buffer block ..................................................................................................... 108 4.8.2 USB buffer block .............................................................................................................................. 108 4.9 Timing Diagram....................................................................................................................................... 109 4.9.1 CPU interface timing ........................................................................................................................ 109 4.9.2 DMA Transfer Timing 1 .................................................................................................................... 111 4.9.3 DMA Transfer Timing 2 .................................................................................................................... 116 4.10 Interrupt Timing ....................................................................................................................................... 119 4.11 Reset Timing ........................................................................................................................................... 119 4.12 Bus Interface Select Timing .................................................................................................................... 120 USB - ii Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 1. M66291 OVERVIEW 1. M66291 OVERVIEW The M66291 is a general purpose USB (Universal Serial Bus) device controller compliant with the USB specification version 1.1 and supports full speed transfer. The USB transceiver circuit is included, and the M66291 meets all transfer types which are defined in the USB specification. The M66291 has FIFO of 3 Kbytes for data transfer and can set 7 endpoints (maximum). Each endpoint can be set programmable of its transfer condition, so can correspond to each device class transfer system of USB. 1.1 Features l l l l l l l l l l l l l l l l l l USB specification 1.1 compliant Supports Full Speed (12 Mbps) transfer Built-in USB transceiver circuit Built-in oscillation buffer (Supports 6M/12M/24 MHz of oscillator) and PLL at 48 MHz Supports Vbus direct connection (5 V withstand voltage input), D+ pin pullup output Supports all transfer type which is defined in the USB specification.(Control transfer / Bulk transfer / Interrupt transfer / Isochronous transfer) Low power consumption operation (Average 15 mA at operation) Robust against signal distortion on USB transfer line due to SIE/DPLL(Digital Phase Lock Loop) of the original design Easy making enumeration program and timing design because hardware manages the device state / control transfer state (transition timing) Reduction of CPU load due to continuous transmit/receive mode (the mode for buffering several transaction data into FIFO) This enables high performance and throughput improvement. Up to 7 endpoints (EP0 to EP6) selectable Data transfer condition selectable for each endpoint (EP1 to EP6) Compatible to various applications (device class) * Data transfer type (Bulk transfer / Isochronous transfer / Interrupt transfer) * Transfer direction (IN, OUT) * Packet size Built-in FIFO buffer (3 Kbytes) for endpoints Buffering conditions of FIFO memory settable per endpoint (EP1 to EP6) * FIFO buffer size (up to 1Kbyte) * Presence/Absence of double buffer configuration (setting of buffer size x 2) Four pieces of configurable FIFO ports * Endpoint number allocation * Access method switching (CPU, DMAC) * Bit width (8-bit / 16-bit) * Endian switching "Interrupt queuing function" that eliminates the need of complicated factor analysis Connectable to various CPU/DMAC * Bus width(8-bit / 16-bit) * Interface voltage(2.7V to 5.5V) * Interrupt signal and DMA control signal polarities settable * Supports multi-word DMA (burst) FIFO access cycle of maximum 24 Mbytes/sec APPLICATION Support all PC peripheral built-in USB USB -1 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP I/O POW ER SUPPLY DAT A BU S 1. M66291 OVERVIEW GN D IOVcc D11/P3 D10/P2 D9/P1 D8/P0 D7 D6 D5 D4 D3 D2 36 35 34 33 32 31 30 29 28 27 26 25 PIN CONFIGURATION (T OP VIEW ) D12/P4 37 24 D1 D13/P5 38 23 D0 D14/P6 39 22 A6 D15/A0 40 21 A5 HIGH-W RITE STROBE/BUS W IDTH SELECT HW R/BYTE 41 20 A4 INTERR UPT 0 INT 0 42 19 A3 18 A2 DATA BUS M66291GP DATA BUS ADD RESS BU S 11 12 IOVcc CO RE PO W ER SUPPLY OSC ILLATION INPUT OSC ILLATION OU TPUT I/O POW ER SU PPLY 10 TC1 INT1/SO F INTERR UPT 1/ SOF OUT PUT TC INPUT 9 5 Dreq1 D- D+ USB DATA(+) USB DATA(-) Core Power Supply O utline M66291G P: 48P6Q -A(LQ FP) DMA REQ UEST 1 Xout 8 Xin 13 Dack1 14 48 DMA ACKNO W LEDG E 1 47 7 D req0 Dack0 TEST DMA REQ UEST 0 DMA ACKNO W LED GE 0 TEST INPUT GN D 6 15 TrON 46 TrO N OUT PUT RST Vbus CoreVcc RESET Vbus INPUT 16 4 A1 45 3 17 CS 2 44 CHIP SELECT 1 LW R GND RD LO W -W RIT E ST ROBE CoreVcc R EAD ST ROBE 43 Figure 1.1 M66291 Pin Configuration USB -2 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 1. M66291 OVERVIEW 1.2 Block Diagram The M66291 contains a USB-IP block, an I/O block, a bus interface unit (BIU), and a FIFO memory. I/O Block (Oscillator) *Xin *Xout USB-IP CPU Interface Register Oscillation Buffer /48MHzPLL Interrupt Controller (USB Power Supply) *Vbus (Pullup Resistance) *TrON (USB Data) *D+ *D- Vbus Input Circuit D+ Pin Pullup Circuit USB Transceiver Transfer Controller Serial Interface Engine (SIE) Endpoint Controller FIFO Memory Controller Bus Interface Unit (BIU) Bus Interface Pins *A1-6 *D0-7 *D8-15 *CS *RD *LWR *HWR Interrupt Pins *INT0 *INT1/SOF DMA Control Pins *Dreq0 *Dack0 *Dreq1 *Dack1 *TC1 Reset Pins *RST FIFO Memory Test Pins *TEST Figure 1.2 M66291 Block Diagram USB -3 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 1. M66291 OVERVIEW 1.2.1 USB-IP The USB-IP block contains a serial interface engine, a transfer controller, an endpoint controller, a FIFO memory controller, an interrupt controller, and a CPU interface register. (1) Serial Interface Engine (SIE) The serial interface engine (SIE) executes low-order protocols processing of USB as follows: * Extracts receive data/clock and generates transmit clock * Serial - parallel conversion of transmit/receive data * NRZI (Non Return Zero Invert) encoding and decoding * Bit stuffing and destuffing * SYNC (Synchronization pattern) and EOP (End Of Packet) detection * USB address and endpoint detection * CRC (Cyclic Redundancy Check) generation and checking (2) Transfer Controller The transfer controller executes device state transition control and control transfer sequence control. (3) Endpoint Controller The endpoint controller executes status control per endpoint. (4) FIFO Memory Controller The FIFO memory controller controls the write/read of the transmit/receive data at SIE (USB bus) side and internal bus (CPU bus) side under state control by the endpoint controller. (5) Interrupt Controller The interrupt controller outputs the status signals outputted by transfer controller and endpoint controller to INT0, INT1/SOF interrupt pins according to the CPU interface register setting. (6) CPU Interface Register The CPU interface register block is composed of the registers for mode setting, command setting and status reading. 1.2.2 Bus Interface Unit (BIU) The bus interface unit (BIU) is a circuit to conform USB-IP to LSI external bus. 1.2.3 FIFO Memory The FIFO memory is a FIFO for endpoint transmit/receive. It is possible to set 6 endpoints EP1 to EP6 in addition to EP0, the endpoint for control transfer. 1.2.4 I/O Block The I/O block is composed of USB transceiver, oscillation buffer, 48 MHz PLL, Vbus input circuit and D+ pin pullup control circuit. USB -4 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 1. M66291 OVERVIEW (1) USB Transceiver The USB transceiver, conforming to the USB specification 1.1, is composed of a pair of 2 pieces of drivers D+/D- complying with full speed transfer mode, a pair of 2 pieces of single end receivers and a differential input receiver. A serial resistance for impedance matching is needed external to the chip. (2) Oscillation Buffer, 48 MHz PLL The 48 MHz clock with accuracy 0.25% is needed at the USB-IP block. The M66291 has a built-in oscillation buffer and a 48 MHz PLL. The PLL is capable of setting the multiplication number depending on the program and can therefore be connected with an external oscillation of 6, 12 or 24 MHz. Further, it can also be operated by the external 48 MHz clock without using the PLL function. (3) Vbus Input Circuit, D+ Pin Pullup Control Circuit The M66291 is capable of learning the connection status with host/hub by means of Vbus pin, and can inform the state of preparation at device side to host/hub by turning on/off the 1.5 K D+ pin pullup. The Vbus input buffer which is 5 V tolerant can be directly connected to the Vbus pin on the USB bus. The current from TrON pin is supplied by Vbus input. Since the D+/D- pins of USB bus are operated at 0 V to 3.3 V, the TrON pin reduces the voltage to 3.3 V before output. Since the USB is constantly pulled down by 15 K at host/hub side when connected electrically, a current of 0.2 mA continuously flows into the D+ pin through the pullup resistance. USB -5 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 1. M66291 OVERVIEW 1.3 Pin Functions Item Pin name Input/ Function Pin Output Bus D7~D0 Count Input/ Data Bus Output This is a data bus to access the register from the system bus. D14/P6~ Input/ Data Bus / Port Signal D8/P0 Output P6 to P0 are used as port signals when selected to 8-bit bus interface. interface 8 7 D14 to D8 are used as data signals when selected to 16-bit bus interface. D15/A0 Input/ D15 Signal / A0 Signal 1 Output A0 (LSB) is used as an address signal when selected to 8-bit bus interface. D15 (MSB) is used as an data signal when selected to 16-bit bus interface. A6~A1 Input 6 Address Bus This is an address bus to access the register from the system bus. *CS Input 1 Chip Select "L" level enables communication with the M66291. *LWR Input 1 Low-write Strobe The lower data (D7 to D0) is written to the register at "L" level. *HWR/*BYTE Input 1 High-write Strobe / Bus Width Select With the reset signal set to "H" level, the 8-bit bus interface is selected if this pin is at "L" level. Further, if this pin is at "H" level, the 16-bit bus interface is selected. When the 16-bit bus interface is selected, the upper data (D15 to D8) is written to the register at "L" level. Fix to "L" level when set to 8-bit bus interface. *RD Input 1 Read Strobe Data are read from registers at "L" level Interrupt *INT0 interface (Note 1) *INT1/*SOF Output 1 Interrupt 0 Interrupts are requested to the system at "L" level. Output (Note 1) 1 Interrupt 1 / SOF Output This pin is used as an interrupt 1 or as a SOF output pin to transmit USB SOF signal according to register setting. DMA *Dreq0 interface (Note 1) *Dack0 Output This pin is used to request DMA transfer to endpoint FIFO for DMA channel 0. Input (Note 1) *Dreq1 (Note 1) 1 DMA Request 0 1 DMA Acknowledge 0 This pin enables access of FIFO by DMA transfer for DMA channel 0. Output 1 DMA Request 1 This pin is used to request DMA transfer to endpoint FIFO for DMA channel 1. USB -6 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 1. M66291 OVERVIEW Item Pin Name Input/ Function Pin Output DMA *Dack1 interface (Note1) *TC1 Input Count 1 DMA Acknowledge 1 This pin enables access of FIFO by DMA transfer for DMA channel 1. Input 1 Terminal Count 1 This pin indicates the final transfer cycle at "L" level for DMA channel 1. This is valid only in write cycle. Set to "H" level when not used. USB D+ interface D- Vbus Input/ USB Data (+) 1 Output D+ of USB. Connect an external resistance in series. Input/ USB Data (-) Output D- of USB. Connect an external resistance in series. Input Vbus Input (with built-in pulldown resistance) 1 1 Connect to the Vbus of USB bus or to the 5V power supply. Connection or shutdown of the Vbus can be detected. TrON Output 1 TrON Output This pin is connected to the D+ pullup resistance of 1.5 K. This pin is used to control ON/OFF of the pullup resistance. Others *RST Input 1 Reset This pin is used to initialize the values of the internal register or the counter at "L" level. Xin Input Oscillator These pins are used to input/output the signals of internal clock Input oscillation circuits. Connect a crystal unit between Xin and Xout 1 pins. Xout TEST Output Input Oscillator If an external clock signal is used, connect it to the Xin pin and Output leave the Xout pin open. 1 1 TEST Input (with built-in pulldown resistance) This pin is input for the test. Set to "L" level or keep open. CoreVcc (Note 2) 2 Core Power Supply These pins are used as the power source for internal logic, FIFO memory, PLL circuit, USB transceiver and oscillation buffer. IOVcc I/O Power Supply 2 Ground 3 (Note 3) GND A pin preceded by an asterisk "*" is an active low pin. (Example: *CS pin is an active low, CS) Note 1: The polarities of *Dreq, *Dack, *INT, and *SOF pins can be changed by the internal registers. Note 2: The Xin, Xout, Vbus, D+ and D- pins are all driven by CoreVcc. Note 3: The pins for bus interface, interrupt, DMA control, reset and test are all driven by IOVcc. See Figure 1.2. USB -7 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2. Registers The M66291GP register mapping is shown in Figure 2.1 and Figure 2.2, and each register is described below. Address +1 address b15 +0 address b8 b7 Reset state b0 H/W S/W USB bus H'00 USB Operation Enable Register H'0000 - - H'02 Remote Wakeup Register H'0000 H'0000 - H'04 Sequence Bit Clear Register H'0000 H'0000 - H'06 (Reserved) H'08 USB_Address Register H'0000 H'0000 H'0000 H'0A Isochronous Status Register H'0000 H'0000 - H'0C SOF Control Register H'0000 H'0000 - H'0E Polarity Set Register H'0000 H'0000 - H'10 Interrupt Enable Register 0 H'0000 H'0000 - H'12 Interrupt Enable Register 1 H'0000 H'0000 - H'14 Interrupt Enable Register 2 H'0000 H'0000 - H'16 Interrupt Enable Register 3 H'0000 H'0000 - H'18 Interrupt Status Register 0 H'0000 H'0000 Note H'1A Interrupt Status Register 1 H'0000 H'0000 - H'1C Interrupt Status Register 2 H'0000 H'0000 - H'1E Interrupt Status Register 3 H'0000 H'0000 - H'20 Request Register H'0000 H'0000 - H'22 Value Register H'0000 H'0000 - H'24 Index Register H'0000 H'0000 - H'26 Length Register H'0000 H'0000 - H'28 Control Transfer Control Register H'0000 - - H'2A EP0 Packet Size Register H'0008 - - H'2C Automatic Response Control Register H'0000 - - H'2E (Reserved) H'30 EP0_FIFO Select Register H'0000 - - H'32 EP0_FIFO Control Register H'0800 - - H'34 EP0_FIFO Data Register ???? - - H'0000 - - H'36 EP0_FIFO Continuous Transmit Data Length Register Note : Refer to each register described below. Figure 2.1 Register Mapping (1) USB -8 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers Address +1 address b15 +0 address b8 b7 Reset state b0 H/W S/W USB bus H'38 (Reserved) H'3A (Reserved) H'3C (Reserved) H'3E (Reserved) H'40 CPU_FIFO Select Register H'0000 - - H'42 CPU_FIFO Control Register H'0800 - - H'44 CPU_FIFO Data Register ???? - - H'46 SIE_FIFO Status Register H'0000 - - H'48 D0_FIFO Select Register H'0000 - - H'4A D0_FIFO Control Register H'0800 - - H'4C D0_FIFO Data Register ???? - - H'4E DMA0_Transaction Count Register H'0000 - - H'50 D1_FIFO Select Register H'0000 - - H'52 D1_FIFO Control Register H'0800 - - H'54 D1_FIFO Data Register ???? - - H'56 DMA1_Transaction Count Register H'0000 - - H'58 FIFO Status Register H'0000 H'0000 - H'5A Port Control Register H'0000 - - H'5C Port Data Register H'0000 - - H'5E Drive Current Adjust Register H'0000 - - H'60 EP1 Configuration Register 0 H'0000 - - H'62 EP1 Configuration Register 1 H'0040 - - H'64 EP2 Configuration Register 0 H'0000 - - H'66 EP2 Configuration Register 1 H'0040 - - H'68 EP3 Configuration Register 0 H'0000 - - H'6A EP3 Configuration Register 1 H'0040 - - H'6C EP4 Configuration Register 0 H'0000 - - H'6E EP4 Configuration Register 1 H'0040 - - H'70 EP5 Configuration Register 0 H'0000 - - H'72 EP5 Configuration Register 1 H'0040 - - H'74 EP6 Configuration Register 0 H'0000 - - H'76 EP6 Configuration Register 1 H'0040 - - Figure 2.2 Register Mapping (2) USB -9 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.1 USB Operation Enable Register USB Operation Enable Register (USB_ENABLE) b15 14 XCKE PLLC 0 - 0 - 13 12 Xtal 0 - b 11 10 9 SCKE USBPC 0 - 0 - 0 - <Address : H'00> 8 7 6 5 4 3 2 1 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - Tr_on 0 - USBE Bit name 15 XCKE Oscillation Buffer Enable b0 Function 0: 1: 0 - <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W Disable oscillation buffer (Disable clock supply to inside PLL) Enable oscillation buffer (Enable clock supply to inside PLL) PLLC PLL Operation Enable 0: 1: Disable PLL (PLL through) Enable PLL Xtal Clock Select 00 : 10 : 01 : 11 : External clock frequency : 48 MHz (PLL through) External clock frequency : 24 MHz External clock frequency : 12 MHz External clock frequency : 6 MHz 11 SCKE Internal Clock Enable 0: 1: Disable Internal clock Enable Internal clock 10 USBPC USB Transceiver Power Control 0: 1: Disable USB transceiver Enable USB transceiver 9~8 Tr_on Tr_on Output Control 00 : 01 : 10 : 11 : TrON output ="Hi-Z" (SIE operate stop) TrON output ="L" Reserved TrON output ="H" 7~1 Reserved. Set it to "0". 0 0 0: 1: S/W reset state S/W reset state release 14 13~12 0 USBE USB Module Operation Enable . (1) XCKE (Oscillation Buffer Enable) Bit (b15) This bit sets enable/disable of the oscillation buffer. The output clock from the oscillation buffer is supplied to the PLL. Refer to Figure 2.3. (2) PLLC (PLL Operation Enable) Bit (b14) This bit sets enable/disable of PLL. When this bit is set to "1", the external clock into the PLL is multiplied according to the value set in the Xtal bits before being output to the core block. Set the XCKE bit to "1" and wait until the oscillation circuit starts and becomes stable before setting this bit to "1". When this bit is set to "0", PLL stops operation and the external clock into the PLL is output to the core block without being multiplied. Hence, be sure to supply the 48 MHz clock to the oscillation buffer when setting this bit to "0". Refer to Figure 2.3. USB -10 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (3) Xtal (Clock Select) Bits (b13~b12) These bits set the multiplication factor of the external clock into PLL. Since it is necessary to supply 48 MHz to the core block, the setting values of these bits are determined by the clock frequency to be input into the PLL. Refer to Figure 2.3. (4) SCKE (Internal Clock Enable) Bit (b11) This bit sets the clock supply into the core block. Set the PLLC bit to "1" and wait until the oscillation of the PLL stabilizes before setting this bit to "1". Refer to Figure 2.3. I/O block Core block Xtal bits Multiplying factor External clock Oscillation buffer PLL Enable/Disable XCKE bit Enable/Disable PLLC bit SCKE bit Figure 2.3 Clock Control (5) USBPC (USB Transceiver Power Control) Bit (b10) This bit sets the enable/disable of the USB transceiver block of I/O block. Even if this bit is set to "0", it is possible to receive the resume signal during the Suspended state (DVSQ bits = "1xx"). It is necessary that the Tr_on bits be set to "x1" (during operation of SIE block). (6) Tr_on (Tr_on Output Control) Bits (b9~b8) These bits set the TrON signal output from I/O block and the enable/disable of SIE block in core block. (7) USBE (USB Module Operation Enable) Bit (b0) This bit sets S/W reset. When this bit is set to "0", the M66291 enters the S/W reset state and the registers are set to their S/W reset state. USB -11 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.2 Remote Wakeup Register Remote Wakeup Register (REMOTE_WAKEUP) <Address : H'02> b15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - b0 WKUP b Bit name 15~1 0 Function Reserved. Set it to "0". WKUP Remote Wakeup Read 0 : Do not output the remote wakeup signal 1 : Output the remote wakeup signal Write 0 : Invalid (Ignored when written) 1 : Output the remote wakeup signal 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 0 0 (1) WKUP (Remote Wakeup) Bit (b0) This bit controls the output of the remote wakeup signal (K state output). This bit is valid only when the device state is "suspend" (DVSQ bits = "1xx"). The writing of "1" to this bit is ignored when the device state is not suspend. When "1" is written to this bit, the K state is output for 10 ms. The bit is automatically cleared to "0" after K state output. The bus idle state continues (this WKUP bit = "1") for 2 ms after the Suspend state is detected when "1" is written to this bit before outputting the K state for 10 ms. The 2 ms and 10 ms time intervals are counted using a clock. Make sure that the counting stops if the clock is not supplied (Note). Note : SCKE bit = "0" when XCKE bit = "1 ", or XCKE bit = "0". USB -12 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.3 Sequence Bit Clear Register Sequence Bit Clear Register (SEQUENCE_BIT) <Address : H'04> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 3 2 1 b0 0 0 - 0 0 - 0 0 - SQCLR b Bit name 15~7 Reserved. Set it to "0". 6~0 SQCLR Sequence Bit Clear Function 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W Write 0 : Invalid (Ignored when written) 1 : Clear Sequence bit b6 corresponds to EP6, ---b1 corresponds to EP1 and b0 corresponds to EP0. 0 0 0 (1) SQCLR (Sequence Bit Clear) Bits (b6~b0) These bits clear the sequence bit (the bit controlled by H/W) and turns the data PID into DATA 0 PID. This bit immediately returns to "0" after writing "1". In the transfers after the sequence bit is cleared, the sequence bit is toggled through H/W control. At S/W reset (USBE bit = "1") and USB bus reset, the sequence bit of each endpoint is not cleared. Note : Be sure to set the response PID of the endpoint whose sequence bit is desired to be cleared to NAK (EP0_PID bits = "00"/EPi_PID bits = "00") before writing "1" to this bit. USB -13 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.4 USB_Address Register USB_Address Register (USB_ADDRESS) <Address : H'08> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 2 1 b0 0 0 0 0 0 0 0 0 0 USB_Addr b Bit name 15~7 Reserved. Set it to "0". 6~0 USB_Addr USB_Address Function Read USB address assigned by the host 0 0 0 <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : H'0000> R W 0 0 x (1) USB_Addr (USB_Address) Bits (b6~b0) These bits store the USB address assigned by the host. On receiving SET_ADDRESS request from the host at default state (DVSQ bits = "001"), the requested device address value is set to this register when the response is made through zero-length packet in status stage. The device address value is set to these bits at the time of zero-length packet transmit even if the ASAD bit is set to "0" (automatic response is invalid). USB -14 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.5 Isochronous Status Register Isochronous Status Register (ISOCHRONOUS_STATUS) b15 14 13 12 0 0 - 0 0 - 0 0 - 0 0 - 11 <Address : H'0A> 10 9 8 7 6 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - FMOD b 0 0 - 4 3 2 1 b0 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - FRNM Bit name 0 0 - Function 15~12 Reserved. Set it to "0". 11 FMOD Frame Number Mode 0: 1: FRNM Frame Number Stores the frame number 10~0 5 At SOF receive At Isochronous transfer complete <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W ? 0 x This register is valid only for isochronous transfer. In other words, the register is valid status for the endpoint that is set EPi_TYP bits to "11". (1) FMOD (Frame Number Mode) Bit (b11) This bit sets the storage timing of the frame number to be stored to the FRNM bits. When this bit is set to "0", when the SOF packet is properly received, the frame number of the received SOF packet gets stored. When this bit is set to "1", when the isochronous packet transfer completes, the frame number of the properly received SOF packet gets stored. (2) FRNM (Frame Number) Bits (b10~b0) The frame number is stored in the FRNM with the timing set by the FMOD bit of this register. Here, the SOFR bit is set to "1". USB -15 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.6 SOF Control Register SOF Control Register (SOF_CNT) b15 14 <Address : H'0C> 13 12 11 10 9 8 7 6 5 4 3 2 1 b0 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - SOFOE SOFA 0 0 - 0 0 - b Bit name Function <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 15 SOFOE SOF Output Enable 0: 1: Disable SOF signal output Enable SOF signal output 14 SOFA SOF Polarity 0: 1: "L" active "H" active 0 0 13~0 Reserved. Set it to "0". (1) SOFOE (SOF Output Enable) Bit (b15) This bit sets the enable/disable of SOF signal output. When this bit is set to "1", if SOF packet is received, the INT1/SOF pin outputs SOF signal. The output polarity is set by SOFA bit. The SOF signal outputs the pulse (approx. 0.67 us) equivalent to 32 clocks of the 48 MHz clock after receiving the PID field. Refer to Figure 2.4. Since the INT1 pin is double-function pin, do not allocate the interrupt signal to this pin when using the SOF signal (Set by the Polarity Set Register). SOF packet USB bus signal SYNC PID FLAME SOF signal ("L" active) CRC5 Fixed length Approx. 0.67us Figure 2.4 SOF Signal Output Timing (2) SOFA (SOF Polarity) Bit (b14) This bit sets the output polarity of SOF signal. USB -16 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.7 Polarity Set Register Polarity Set Register (POLARITY_CNT) <Address : H'0E> b15 14 13 12 11 10 9 8 VB01 RM01 SF01 DS01 CT01 BE01 NR01 RD01 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - b 7 6 5 4 3 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - Bit name Function 2 1 b0 RDYM INTL INTA 0 0 - 0 0 - 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 15 VB01 Vbus Interrupt Assign 0: 1: Assigns to INT0 pin Assigns to INT1 pin (Note) 14 RM01 Resume Interrupt Assign 0: 1: Assigns to INT0 pin Assigns to INT1 pin (Note) 13 SF01 SOF Detect Interrupt Assign 0: 1: Assigns to INT0 pin Assigns to INT1 pin (Note) 12 DS01 Device State Transition Interrupt Assign 0: 1: Assigns to INT0 pin Assigns to INT1 pin (Note) 11 CT01 Control Transfer Transition Interrupt Assign 0: 1: Assigns to INT0 pin Assigns to INT1 pin (Note) 10 BE01 Buffer Empty/Size Over Error Interrupt Assign 0: 1: Assigns to INT0 pin Assigns to INT1 pin (Note) 9 NR01 Buffer Not Ready Interrupt Assign 0: 1: Assigns to INT0 pin Assigns to INT1 pin (Note) 8 RD01 Buffer Ready Interrupt Assign 0: 1: Assigns to INT0 pin Assigns to INT1 pin (Note) 0 0 7~3 Reserved. Set it to "0". 2 RDYM Buffer Ready Mode 0: 1: Clears the EPB_RDY bits by reading/writing all data of buffer Clears the EPB_RDY bits by writing "0" to EPB_RDY bit 1 INTL Interrupt Output Sense 0: 1: Edge sensitive output Level sensitive output INTA 0 : "L" active or change from "H" to "L" Interrupt Polarity 1 : "H" active or change from "L" to "H" Note : In order to allocate the interrupt output signal to the INT1/SOF pin, set the SOF signal output to "disable" (SOFOE bit = "0"). 0 (1) VB01 (Vbus Interrupt Assign) Bit (b15) This bit selects the pin to output the Vbus interrupt signal. (2) RM01 (Resume Interrupt Assign) Bit (b14) This bit selects the pin to output the resume interrupt signal. (3) SF01 (SOF Detect Interrupt Assign) Bit (b13) This bit selects the pin to output the SOF detect interrupt signal. (4) DS01 (Device State Transition Interrupt Assign) Bit (b12) This bit selects the pin to output device state transition interrupt signal. (5) CT01 (Control Transfer Transition Interrupt Assign) Bit (b11) This bit selects the pin to output the control transfer transition interrupt signal. USB -17 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (6) BE01 (Buffer Empty/Size Over Error Interrupt Assign) Bit (b10) This bit selects the pin to output the buffer empty/size over error interrupt signal. (7) NR01 (Buffer Not Ready Interrupt Assign) Bit (b9) This bit selects the pin to output the buffer not ready interrupt signal. (8) RD01 (Buffer Ready Interrupt Assign) Bit (b8) This bit selects the pin to output the buffer ready interrupt signal. (9) RDYM (Buffer Ready Mode) Bit (b2) This bit selects the method of clearing the buffer ready interrupt. When this bit is set to "0", the EPB_RDY bit is cleared to "0" after the CPU side buffer data are all read out or after the writing of transmit data completes. When this bit is set to "1", the EPB_RDY bit is cleared to "0" by writing "0" to the EPB_RDY bit. For details, refer to "EPB_RDY bit". Note : Refer to "3.2 FIFO Buffer" for CPU/SIE side. (10) INTL (Interrupt Output Sense) Bit (b1) This bit sets the sense mode for interrupt output from INT0 or INT1 pin. When this bit is set to "0", the INT0 or INT1 pin notifies the occurrence of interrupt at the edge set by the INTA bit. During edge sensitive output, when "0" is written to each interrupt factor bit to clear the interrupt, the output signal outputs the negate value one time. If the other interrupt factor bits are set to "1", the occurrence of interrupt again is notified at the edge. The negate period is equivalent to 32 clocks (approx. 667 ns) of the 48 MHz clock. In case the clock is not supplied (Note), the negate period does not occur. Make sure not to miss the interrupt when Vbus interrupt or resume interrupt occurs. When this bit is set to "1", the INT0 or INT1 pin notifies the occurrence of interrupt at the level set by the INTA bit. During level sensitive output, the negate fails to work unless all interrupt factor bits are cleared even if "0" is written to clear the interrupt to the interrupt factor bits. Refer to Figure 2.5 and "3.1 Interrupt Function". Note : SCKE bit = "0" when XCKE bit = "1 " , or XCKE bit = "0". USB -18 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers <Edgesense> Factor1 occur Factor2 occur Factor1 clear Factor2 clear Interruptfactor1 ("H"active) Interruptfactor2 ("H"active) Interruptpin ("L"active) Negateperiod (Approx.667ns) <Levesense> Factor1 occur Factor2 occur Factor1clear Factor2 clear Interruptfactor1 ("H"active) Interruptfactor2 ("H"active) Interruptpin ("L"active) Figure 2.5 Interrupt Signal Output Timing (11) INTA (Interrupt Polarity) Bit (b0) This bit sets the interrupt signal output polarity. When this bit is set to "0", the occurrence of interrupt is notified when; In case of edge sense (INTL bit = "0") : Change from "H" to "L" In case of level sense (INTL bit = "1") : "L" level When this bit is set to "1", the occurrence of interrupt is notified when; In case of edge sense (INTL bit = "0") : Change from "L" to "H" In case of level sense (INTL bit = "1") : "H" level USB -19 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.8 Interrupt Enable Register 0 Interrupt Enable Register 0 (INT_ENABLE0) b15 14 13 12 VBSE RSME SOFE DVSE 0 0 - 0 0 - 0 0 - 0 0 - b 11 10 <Address : H'10> 9 8 CTRE BEMPE INTNE INTRE 0 0 - 0 0 - 0 0 - 0 0 - 7 6 5 4 3 2 1 b0 URST SADR SCFG SUSP WDST RDST CMPL SERR 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - Bit name Function <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 15 VBSE Vbus Interrupt Enable 0: 1: Disable interrupt Enable interrupt (Interrupt occurs when VBUS bit is set to "1") 14 RSME Resume Interrupt Enable 0: 1: Disable interrupt Enable interrupt (Interrupt occurs when RESM bit is set to "1") 13 SOFE SOF Detect Interrupt Enable 0: 1: Disable interrupt Enable interrupt (Interrupt occurs when SOFR bit is set to "1") 12 DVSE Device State Transition Interrupt Enable 0: 1: Disable interrupt Enable interrupt (Interrupt occurs when DVST bit is set to "1") 11 CTRE Control Transfer Transition Interrupt Enable 0: 1: Disable interrupt Enable interrupt (Interrupt is occurs when CTRT bit is set to "1") 10 BEMPE 0: Buffer Empty/Size Over Error Interrupt Enable 1 : Disable interrupt Enable interrupt (Interrupt is occurs when BEMP bit is set to "1") 9 INTNE Buffer Not Ready Interrupt Enable 0: 1: Disable interrupt Enable interrupt (Interrupt occurs when INTN bit is set to "1") 8 INTRE Buffer Ready Interrupt Enable 0: 1: Disable interrupt Enable interrupt (Interrupt occurs when INTR bit is set to "1") 7 URST USB Reset Detect 0: 1: Disable DVST bit set Enable DVST bit set 6 SADR SET_ADDRESS Execute 0: 1: Disable DVST bit set Enable DVST bit set 5 SCFG SET_CONFIGURATION Execute 0: 1: Disable DVST bit set Enable DVST bit set 4 SUSP Suspend Detect 0: 1: Disable DVST bit set Enable DVST bit set 3 WDST Control Write Transfer Status Stage 0: 1: Disable CTRT bit set Enable CTRT bit set 2 RDST Control Read Transfer Status Stage 0: 1: Disable CTRT bit set Enable CTRT bit set 1 CMPL Control Transfer Complete 0: 1: Disable CTRT bit set Enable CTRT bit set 0 SERR Control Transfer Sequence Error 0: 1: Disable CTRT bit set Enable CTRT bit set This register sets enable of interrupt and enable/disable of setting DVST and CTRT bits to "1". Also refer to "3.1 Interrupt Function". USB -20 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (1) VBSE (Vbus Interrupt Enable) Bit (b15) This bit sets enable/disable of Vbus interrupt. When this bit is set to "1", the interrupt occurs if VBUS bit is set to "1". This bit is capable of writing/reading even if the clock is not supplied (Note). Note : At SCKE bit = "0" when XCKE bit = "1 " or XCKE bit = "0". (2) RSME (Resume Interrupt Enable) Bit (b14) This bit sets enable/disable of resume interrupt. When this bit is set to "1", the interrupt occurs if RESM bit is set to "1". This bit is capable of writing/reading even if the clock is not supplied (Note). Note : At SCKE bit = "0" when XCKE bit = "1 " or XCKE bit = "0". (3) SOFE (SOF Detect Interrupt Enable) Bit (b13) This bit sets enable/disable of SOF detect interrupt. When this bit is set to "1", the interrupt occurs if SOFR bit is set to "1". (4) DVSE (Device State Transition Interrupt Enable) Bit (b12) This bit sets enable/disable of device state transition interrupt. When this bit is set to "1", the interrupt occurs if DVST bit is set to "1". The Conditions the DVST bit set are depend on the URST, SADR, SCFG or SUSP. (5) CTRE (Control Transfer Transition Interrupt Enable) Bit (b11) This bit sets enable/disable of control transfer transition interrupt. When this bit is set to "1", the interrupt occurs if CTRT bit is set to "1". The Conditions the DVST bit set are depend on the WDST, RDST, CMPL or SERR. The complete of setup stage can not set enable/disable to set CTRT bit to "1". (6) BEMPE (Buffer Empty/Size Over Error Interrupt Enable) Bit (b10) This bit sets enable/disable of buffer empty/size over error interrupt. When this bit is set to "1", the interrupt occurs if BEMP bit is set to "1". (7) INTNE (Buffer Not Ready Interrupt Enable) Bit (b9) This bit sets enable/disable of buffer not ready interrupt. When this bit is set to "1", the interrupt occurs if INTN bit is set to "1". (8) INTRE (Buffer Ready Interrupt Enable) Bit (b8) This bit sets enable/disable of buffer ready interrupt. When this bit is set to "1", the interrupt occurs if INTR bit is set to "1". (9) URST (USB Reset Detect) Bit (b7) This bit selects whether to set the DVST bit to "1" or not at the USB bus reset detection. The register is initialized by the USB reset detection, irrespective of the value of this bit. (10) SADR (SET_ADDRESS Execute) Bit (b6) This bit selects whether to set the DVST bit to "1" or not at the SET_ADDRESS execution. For details, refer to "DVST bit". USB -21 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (11) SCFG (SET_CONFIGURATION Execute) Bit (b5) This bit selects whether to set the DVST bit to "1" or not at the SET_ CONFIGURATION execution. For details, refer to "DVST bit". (12) SUSP (Suspend Detect) Bit (b4) This bit selects whether to set the DVST bit to "1" or not at the suspend detection. (13) WDST (Control Write Transfer Status Stage) Bit (b3) This bit selects whether to set the CTRT bit to "1" or not when transited to status stage during control write transfer. (14) RDST (Control Read Transfer Status Stage) Bit (b2) This bit selects whether to set the CTRT bit to "1" or not when transited to status stage during control read transfer. (15) CMPL (Control Transfer Complete) Bit (b1) This bit selects whether to set the CTRT bit to "1" or not when the status stage completes during control transfer. (16) SERR (Control Transfer Sequence Error) Bit (b0) This bit selects whether to set the CTRT bit to "1" or not when the sequence error is detected at control transfer. USB -22 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.9 Interrupt Enable Register 1 Interrupt Enable Register 1 (INT_ENABLE1) <Address : H'12> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 3 2 1 b0 0 0 - 0 0 - 0 0 - EPB_RE b Bit name 15~7 Reserved. Set it to "0". 6~0 EPB_RE Buffer Ready Interrupt Enable Function 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 0 : Disable INTR bit set 1 : Enable INTR bit set b6 corresponds to EP6, ---b1 corresponds to EP1 and b0 corresponds to EP0. 0 0 (1) EPB_RE (Buffer Ready Interrupt Enable) Bits (b6~b0) These bits select whether to set the INTR bit to "1" or not when the EPB_RDY bit is set to "1". Also refer to "3.1 Interrupt Function". USB -23 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.10 Interrupt Enable Register 2 Interrupt Enable Register 2 (INT_ENABLE2) <Address : H'14> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 3 2 1 b0 0 0 - 0 0 - 0 0 - EPB_NRE b Bit name 15~7 Reserved. Set it to "0". 6~0 EPB_NRE Buffer Not Ready Interrupt Enable Function 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 0 : Disable INTN bit set 1 : Enable INTN bit set b6 corresponds to EP6, ---b1 corresponds to EP1 and b0 corresponds to EP0. 0 0 (1) EPB_NRE (Buffer Not Ready Interrupt Enable) Bits (b6~b0) These bits select whether to set the INTN bit to "1" or not when the EPB_NRDY bit is set to "1". Also refer to "3.1 Interrupt Function". Note : Do not set the corresponding bit of this register to "1" when the endpoint is set to isochronous transfer (set by EPi _TYP bits). USB -24 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.11 Interrupt Enable Register 3 Interrupt Enable Register 3 (INT_ENABLE3) <Address : H'16> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 3 2 1 b0 0 0 - 0 0 - 0 0 - EPB_EMPE b Bit name Function 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 15~7 Reserved. Set it to "0". 0 0 6~0 EPB_EMPE 0 : Disable BEMP bit set Buffer Empty/Size Over Error Interrupt Enable 1 : Enable BEMP bit set b6 corresponds to EP6, ---b1 corresponds to EP1 and b0 corresponds to EP0. (1) EPB_EMPE (Buffer Empty/Size Over Error Interrupt Enable) Bits (b6~b0) These bits select whether to set the BEMP bit to "1" or not when the EPB_EMP_OVR bit is set to "1". Also refer to "3.1 Interrupt Function". USB -25 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.12 Interrupt Status Register 0 Interrupt Status Register 0 (INT_STATUS0) <Address : H'18> b15 14 13 12 11 10 9 8 7 VBUS RESM SOFR DVST CTRT BEMP INTN INTR Vbus 0 0 - 0 0 - 0 0 - 0 0 1 0 0 - 0 0 - 0 0 - 0 0 - 0 0 0 b Bit name 6 5 4 DVSQ 0 0 0 0 0 0 Function 3 2 VALID 0 0 1 0 0 - 1 b0 CTSQ 0 0 - 0 0 - 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : B'---1----0001----> R W 15 VBUS Vbus Interrupt Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write 0 : Clear Interrupt 1 : Invalid (Ignored when written) 14 RESM Resume Interrupt Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write 0 : Clear Interrupt 1 : Invalid (Ignored when written) 13 SOFR SOF Detect Interrupt Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write 0 : Clear Interrupt 1 : Invalid (Ignored when written) 12 DVST Device State Transition Interrupt Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write 0 : Clear Interrupt 1 : Invalid (Ignored when written) 11 CTRT Control Transfer Stage Transition Interrupt Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write 0 : Clear Interrupt 1 : Invalid (Ignored when written) 10 BEMP Buffer Empty/Size Over Error Interrupt Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write Invalid (Ignored when written) x 9 INTN Buffer Not Ready Interrupt Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write Invalid (Ignored when written) x USB -26 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers b R W 8 INTR Buffer Ready Interrupt Bit name Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write Invalid (Ignored when written) x 7 Vbus Vbus Level Read 0 : "L" 1 : "H" Write Invalid (Ignored when written) x DVSQ Device State Read 000 : Powered state 001 : Default state 010 : Address state 011 : Configured state 1xx : Suspended state (Note) Write Invalid (Ignored when written) x VALID Setup Packet Detect Read 0 : No detection 1 : Receiving the setup packet Write 0 : This VALID bit clear 1 : Invalid (Ignored when written) CTSQ Control Transfer Stage Read 000 : Idle or setup stage 001 : Control read transfer data stage 010 : Control read transfer status stage 011 : Control write transfer data stage 100 : Control write transfer status stage 101 : Control write no data transfer status stage 110 : Control transfer sequence error 111 : Reserved Write Invalid (Ignored when written) x 64 3 2~0 Function Note : x is a optional value. The b15 to b8 of this register are interrupt status bits. When the bit of the Interrupt Enable Register corresponding to these bits are set to "1" (interrupt enable), the interrupt occurs by setting these bits to "1". (1) VBUS (Vbus Interrupt) Bit (b15) This bit indicates the change of Vbus input. This bit is set to "1" (Vbus interrupt occurs) when the Vbus input changes ("L"->"H" or "H"->"L"). This bit is cleared to "0" by writing "0" (interrupt is cleared). This bit is set to "1" and can be read out even if the clock is not supplied (Note). This bit can also be cleared by writing "0". In case the clock is not supplied, make sure to write "1" after writing "0" (no further interrupt will be accepted). Note : SCKE bit = "0" when XCKE bit = "1 ", or XCKE bit = "0". USB -27 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (2) RESM (Resume Interrupt) Bit (b14) This bit indicates the change of USB bus state. This bit is set to "1" when the USB bus state is changed from suspended (DVST bits = "1xx") to "J"->"K" or "J"->"SE0" (resume interrupt occurs). This bit is cleared to "0" by writing "0" (interrupt is cleared). This bit is set to "1" and can be read out even if the clock is not supplied (Note). This bit can also be cleared by writing "0". In case the clock is not supplied, make sure to write "1" after writing "0" (no further interrupt will be accepted). Note : At SCKE bit = "0" when XCKE bit = "1 " or XCKE bit = "0". (3) SOFR (SOF Detect Interrupt) Bit (b13) This bit indicates that the SOF packet is received and the frame number is updated. This bit is set to "1" when the SOF packet is received and the frame number is stored at the timing set by the FMOD bit of the Isochronous Status Register (SOF detect interrupt occurs). This bit is cleared to "0" by writing "0" (interrupt is cleared). (4) DVST (Device State Transition Interrupt) Bit (b12) This bit indicates the transition of the device state. This bit is set to "1" when the transition of device states takes place as follows (device state transition interrupt occurs): (A) USB bus reset detect (Arbitrary state -> Default state): When the SE0 state continues for 2.5 us or more in D+ and D- pins, the USB bus reset is detected, causing this bit to be set to "1". (B) "SET_ADDRESS" execute (Default state -> Address state): This bit is set to "1" when the SET_ADDRESS request is detected as (a) and the response is made by zero-length packet in status stage. (a) "SET_ADDRESS" request in case device address value in default state is not "0": In case the wValue in default state is "0", this bit is not set to "1". When this request is received, the device address value is set to the USB_Address Register, irrespective of the setting of this bit. (C) "SET CONFIGURATION" execute (Address state -> Configured state): This bit is set to "1" when the requests below are detected and ACK is received after the response is made through zero-length packet in status stage. (a) "SET_CONFIGURATION" request in case configuration value in address state is not "0" (b) "SET_CONFIGURATION" request in case configuration value in configured state is "0" (D) Suspend detect (Powered/Default/Address/Configured state -> Suspended state): The suspended state is detected and this bit is set to"1" when the idle state continues for 3 ms or more in D+ and D- pins. The Conditions that this bit indicates "1" depend on the URST, SADR, SCFG or SUSP bits. This bit is cleared to "0" by writing "0" (interrupt is cleared). The present device state can be confirmed by the DVSQ bits. USB -28 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (5) CTRT (Control Transfer Stage Transition Interrupt) Bit (b11) This bit indicates the transition of stage in control transfers. This bit is set to "1" when the stage transition of control transfer takes place as follows (control transfer stage transition interrupt occurs): Refer to Figure 2.7. * * * * * Setup Stage Complete (When transmitting ACK) Control Write Transfer Status Stage Transition (When receiving IN token) Control Read Transfer Status Stage Transition (When receiving OUT token) Control Transfer Complete (When transmitting or receiving ACK) Control Transfer Sequence Error (When error occurs) The Conditions that this bit indicates "1" depend on the WDST, RDST, CMPL or SERR bits. This bit is cleared to "0" by writing "0" (interrupt is cleared). The present stage can be confirmed by the CTSQ bits. (6) BEMP (Buffer Empty/Size Over Error Interrupt) Bit (b10) This bit indicates the occurrence of "buffer empty" or "buffer size over error". This bit is set to "1" when the EPB_EMP_OVR bit is set to "1" (buffer empty/buffer size over error interrupt occurs). This bit is cleared by setting all the bits of Interrupt Status Register 3 to "0". For details, refer to "Interrupt Status Register 3". (7) INTN (Buffer Not Ready Interrupt) Bit (b9) This bit indicates the NAK has been sent to the host because of the "buffer not ready" state. This bit is set to "1" when the EPB_NRDY bit is set to "1" (buffer not ready interrupt occurs). This bit is cleared by setting all the bits of Interrupt Status Register 2 to "0". For details, refer to "Interrupt Status Register 2". (8) INTR (Buffer Ready Interrupt) Bit (b8) This bit indicates the "buffer ready" state (that can be read/written). This bit is set to "1" when the EPB_RDY bit is set to "1" (buffer ready interrupt occurs). This bit is cleared by setting all the bits of Interrupt Status Register 1 to "0". For details, refer to "Interrupt Status Register 1". (9) Vbus (Vbus Level) Bit (b7) This bit indicates the state of Vbus pin. When this bit changes, the VBUS bit is set to "1". This bit is capable of reading the correct value even if the clock is not supplied (Note). Note : SCKE bit = "0" when XCKE bit = "1 ", or XCKE bit = "0". (10) DVSQ (Device State) Bits (b6~b4) These bits indicate the present device states as follows: 000 : Powered State Power ON state 001 : Default State USB bus reset detected state 010 : Address State SET_ADDRESS request executed state 011 : Configured State SET_CONFIGURATION request executed state 1xx : Suspended State "suspended" detected state Depending on the changes of these device states, the DVST bit and the RESM bit are set to "1" (set enable/disable by the URST, SADR, SCFG or SUSP bits). For details, refer to "DVST bit" and Figure 2.6. USB -29 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers Suspend detection (W hen SUSP bit="1", DVST bit is set to "1") Suspended state (DVSQ bits="100") Powered state (DVSQ bits ="000") Resume (RESM bit is set to "1") USB bus reset detection (W hen URST bit="1", DVST bit is set to "1") Suspend detection (W hen SUSP bit="1", DVST bit is set to "1") USB bus reset detection (W hen URST bit="1", DVST bit is set to "1") Default state (DVSQ bits="001") Suspended state (DVSQ bits="101") Resume (RESM bit is set to "1") SET _ADDR ESS excecution (W hen SAD R bit="1", DVST bit is set to "1") Suspend detection (W hen SUSP bit="1", DVST bit is set to "1") Address state (DVSQ bits="010") Suspended state (DVSQ bits="110") Resume (RESM bit is set to "1") SET _CONFIGURAT ION excecution[ConfigurationValue=/ 0] (W hen SCFG bit="1", DVST bit is set to "1") SET _CO NFIGURAT IO N excecution[ConfigurationValue=0] ( W hen SCFG bit="1", DVST bit is set to "1") Suspend detection (W hen SUSP bit="1", DVST bit is set to "1") Configured state (DVSQ bits="011") Suspended state (DVSQ bits="111") Resume (RESM bit is set to "1") Note : T he URST , SADR, SC FG and SUSP bits (Interrupt Enable Register 0) in the parenthesis set enable/disable to set the DVST bit to "1" for the corresponding stage transition. There is no bit to set enable/disable to set the RESM bit to "1". T he stage transition takes place even if these bits are inhibited to set to "1". Figure 2.6 Device State Transition (11) VALID (Setup Packet Detect) Bit (b3) This bit indicates that the setup token has been received. When the setup token is completely received, this bit is set to "1". When this bit is set to "1", the writing to EP0_PID/CCPL bits of EP0_FIFO Control Register is ignored. At the time of receiving the setup token, the interrupt has not occurred (the interrupt occurs only after the termination of setup stage). This bit is cleared to "0" by writing "0". USB -30 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (12) CTSQ (Control Transfer Stage) Bits (b2~b0) These bits indicate the present stage in the control transfer. Refer to Figure 2.7. 000 : Idle or Setup Stage 001 : Control Read Transfer Data Stage 010 : Control Read Transfer Status Stage 011 : Control Write Transfer Data Stage 100 : Control Write Transfer Status Stage 101 : Control Write No Data Transfer Status Stage 110 : Control Transfer Sequence Error (refer to below) 111 : Reserved The control transfer sequence error is described below. When this error occurs, the EP0_PID bits are set to "1x" (stall state). <At control read transfer> * OUT token is received when data is never transferred against the IN token of the data stage. * IN token is received at status stage. * Data packet other than the zero-length packet is received at status stage. <At control write transfer> * IN token is received when ACK response is never made against the OUT token of the data stage. * OUT token is received in status stage. <At control write no data transfer> * OUT token is received in status stage. <Others> * Data exceeding in size set by the EP0 Packet Size Register is received (the EPB_EMP_OVR bit of the Interrupt Status Register 3 is set to "1"). In case the amount of received data exceeds the wLength value in the request at the data stage of the control write transfer, it is not recognized as the control transfer sequence error. Setup token receive Setup token receive Setup token receive [CTSQ bits ="000"] Setup stage ACK transmit (1) ACK transmit (1) [CTSQ bits ="001"] Control read transfer data stage [CTSQ bits ="011"] Control write transfer data stage [CTSQ bits ="1xx"] Control transfer sequence error (Note ) OUT token receive (2) Error detection [CTSQ bits ="010"] Control read transfer status stage (3) [CTSQ bits ="100"] Control write transfer status stage (1) [CTSQ bits ="101"] Control write transfer no data status stage IN token receive ACK transmit : CTRTinterrupt has occurred (1) Setup stage completion (2) Control read transfer status stage transition (3) Control write transfer status stage transition (4) Control transfer completion (5) Control transfer sequence error (5) ACK transmit (4) [CTSQ bits ="000"] Idle stage ACK receive ACK receive Note : When the SERR bit is set to "1" and the control transfer sequence error causes the CTRT interrupt to occur, the CTSQ bit values (1xx) are retained until "0" is written to the CTRT bit (interrupt is cleared). Further, even after the completion of the next set up stage, the CTRT interrupt due to the completion of the set up stage is not occurred until "0" is written to the CTRT bit. When the SERR bit is set to "0", if setup token is received, the CTSQ bits changes to "000". Figure 2.7 Control Transfer Transition USB -31 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.13 Interrupt Status Register 1 Interrupt Status Register 1 (INT_STATUS1) <Address : H'1A> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 3 2 1 b0 0 0 - 0 0 - 0 0 - EPB_RDY b Bit name 15~7 Reserved. Set it to "0". 6~0 EPB_RDY Buffer Ready Interrupt Function 0 0 - <H/W reset :H'0000> <S/W reset : H'0000> <USB bus reset : -> R W Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write <When RDYM bit is set to "0"> Invalid (Ignored when written) <When RDYM bit is set to "1"> 0 : Clear interrupt clear 1 : Invalid (Ignored when written) b6 corresponds to EP6, ---b1 corresponds to EP1 and b0 corresponds to EP0. 0 0 (1) EPB_RDY (Buffer Ready Interrupt) Bits (b6~b0) The bit corresponding to each endpoint is set to "1" with the buffer at "ready" state. The ready state refers to the state when CPU or DMAC can read or write the CPU side buffer. When the EPB_RE bit is set to "1", if this bit is set to "1", the INTR bit is set to "1", causing the buffer ready interrupt to occur. Setting "1"/clearing to "0" to this bit differs according to the endpoint and transfer direction as shown below: Note : Refer to "3.2 FIFO Buffer" for CPU/SIE side. l Endpoint 0 When set to control write transfer (ISEL bit = "0") The condition for this bit to be set to "1" is as follows: * When the IVAL bit of the EP0_FIFO Control Register changes from "0" to "1" The condition for this bit to be cleared to "0" differs according to the RDYM bit: * RDYM bit = "0" : When the IVAL bit of the EP0_FIFO Control Register changes from "1" to"0" * RDYM bit = "1" : Writes "0" to this bit When set to control read transfer (ISEL bit = "1") This bit is not set to "1" (Refer to "EPB_EMP_OVR bit"). USB -32 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers l Endpoint 1~6 When set to OUT buffer (EPi_DIR bit = "0") The condition for this bit to be set to "1" is as follows: <The endpoint not specified by DMA_EP bits> <The endpoint specified by DMA_EP bits with INTM bit set to "1"> * When the IVAL bit of the endpoint changes from "0" to "1" <The endpoint specified in DMA_EP bits with INTM bit set to "0"> * When the buffer data including the received short packet (including the zero-length packet) are all read out The condition for this bit to be cleared to "0" differs according to the RDYM bit (Note): * RDYM bit = "0" : When the IVAL bit of the endpoint changes from "1" to "0" * RDYM bit = "1" : Writes "0" to this bit Note : When the INTM bit at the endpoint specified by the DMA_EP bit is set to "0", the IVAL bit is retained to "1". Thus, it is necessary to write "1" to the BCLR bit and to clear the IVAL bit to "0" when RDYM bit is set to "0". Even when the RDYM bit is set to "1", this bit can be cleared by writing "0". It is necessary to write "1" to the BCLR bit and to clear the IVAL bit. When set to IN buffer (EPi_DIR bit = "1") The condition for this bit to be set to "1" is as follows: <The endpoint not specified by DMA_EP bits> <The endpoint specified by DMA_EP bits with INTM bit set to "1"> * When the IVAL bit of the endpoint changes from "1" to "0" * Or when EPi_DER bit is changed from "0" to "1" <The endpoint specified by DMA_EP bits with INTM bit set to "0"> This bit is not be set to "1". The condition for this bit to be cleared to "0" differs according to the RDYM bits: * RDYM bit = "0" : When the IVAL bit of the endpoint changes from "0" to "1" * RDYM bit = "1" : Writes "0" to this bit Note : The IVAL bit is located per endpoint. For details, refer to "3.2.4 IVAL Bit and EPB_RDY Bit". OUT token USB bus SYNC PID Addr Endp CRC EOP Data packet SYNC PID Interrupt output Data CRC EOP ACK packet SYNC PID EOP Occurrence of buffer ready interrupt because the buffer could be read Figure 2.8 Examples of Buffer Ready Interrupt Occurrence Timing (OUT transfer) USB -33 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.14 Interrupt Status Register 2 Interrupt Status Register 2 (INT_STATUS2) <Address : H'1C> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 3 2 1 b0 0 0 - 0 0 - 0 0 - EPB_NRDY b Bit name 15~7 Reserved. Set it to "0". 6~0 EPB_NRDY Buffer Not Ready Interrupt 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W Function Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write 0 : Clear interrupt 1 : Invalid (Ignored when written) b6 corresponds to EP6, ---b1 corresponds to EP1 and b0 corresponds to EP0. 0 0 (1) EPB_NRDY (Buffer Not Ready Interrupt) Bits (b6~b0) The bit corresponding to each endpoint is set to "1" when IN token/OUT token is received with the buffer at "not ready" state. The "not ready" state refers to the state when EP0_PID bits and EPi_PID bits are set to BUF/STALL response and means that the buffer could not be received and transmitted. When this bit is set to "1", if the EP0_PID and EPi_PID bits are set to BUF, NAK response is executed, and if they are set to STALL, STALL response is executed. When the EPB_NRE bit is set to "1", if this bit is set to "1", the INTN bit is set to "1", causing the buffer not ready interrupt to occur. This bit is cleared by writing "0". Note: In case the endpoint is set to isochronous transfer (set by EPi_TYP bits), the corresponding bit of this register may be set to "1". Hence, do not set the corresponding bit of the Interrupt Enable Register 2 to "1". OUT token USB bus SYNC PID Addr Endp CRC EOP Data packet SYNC PID Data CRC EOP NAK/STALL packet SYNC PID EOP Interrupt output Occurrence of buffer not ready interrupt because the buffer could not be received Figure 2.9 Examples of Buffer Not Ready Interrupt Occurrence Timing (OUT transfer) IN token USB bus SYNC PID Addr Endp CRC EOP NAK/STALL packet SYNC PID EOP Interrupt output Occurrence of buffer not ready interrupt because the buffer could not be transmitted Figure 2.10 Examples of Buffer Not Ready Interrupt Occurrence Timing (IN transfer) USB -34 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.15 Interrupt Status Register 3 Interrupt Status Register 3 (INT_STATUS3) <Address : H'1E> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 3 2 1 b0 0 0 - 0 0 - EPB_EMP_OVR b Bit name 15~7 6~0 Reserved. Set it to "0". EPB_EMP_OVR Buffer Empty/Size Over Interrupt Function 0 0 - 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W Read 0 : No occurrence of interrupt 1 : Occurrence of interrupt Write 0 : Clear interrupt 1 : Invalid (Ignored when written) b6 corresponds to EP6, ---b1 corresponds to EP1 and b0 corresponds to EP0. 0 0 (1) EPB_EMP_OVR (Buffer Empty/Size Over Interrupt) Bits (b6~b0) These bits indicate that the received data size exceeds the maximum packet size or that the buffers of the endpoints 0 to 6 are empty. l Endpoint 0 When set to control write transfer (ISEL bit = "0") The condition for this bit to be set to "1" is as follows: * Receives packet data with size exceeding the one set by the EP0 Packet Size Register (Size-over detection). In this case, the EP0_PID bits are set to STALL response. Further the CTRT bit sets to "1" if the SERR bit is set to "1". This bit is set to "1" when size-over is detected, irrespective of the EP0_PID bit setting. When set to control read transfer (ISEL bit = "1") The condition for this bit to be set to "1" is as follows: * When the IVAL bit of the EP0_FIFO Control Register changes from "1" to "0". * When transmit data exist in the buffer for EP0_FIFO and "1" is written to the BCLR bit. l Endpoint 1~6 When set to OUT buffer (EPi_DIR bit = "0") The condition for this bit to be set to "1" is as follows: * Receives packet data with size exceeding the one set by the EPi_MXPS bits (Size-over detection). The EPi_PID bits are set to STALL response. This bit isn't set to "1" at isochronous transfer. This bit is set to "1" when size-over is detected, irrespective of the EP0_PID bit setting. When set to IN buffer (EPi_DIR bit = "1") The condition for this bit to be set to "1" is as follows: * When the data of SIE side buffer are all transmitted with the data not written to the CPU side buffer (Buffer empty). The conditions for this bit to be cleared to "0" in all bits are as follows: * Writes "0" to this bit. Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. USB -35 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.16 Request Register Request Register (REQUEST_TYPE) b15 14 13 12 0 0 - 0 0 - 0 0 - 0 0 - 11 <Address : H'20> 10 9 8 7 6 5 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - bRequest b 0 0 - 4 3 2 1 b0 0 0 - 0 0 - 0 0 - bmRequestType Bit name 0 0 - Function 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 15~8 bRequest Request Read Request received in the setup stage Write Invalid (Ignored when written) x 7~0 bmRequestType Request Type Read Request type received in the setup stage Write Invalid (Ignored when written) x (1) bRequest (Request) Bits (b15~b8) These bits store the bRequest of the device request received in the setup stage of the control transfer. (2) bmRequestType (Request Type) Bits (b7~b0) These bits store the bmRequestType of the device request received in the setup stage of the control transfer. USB -36 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.17 Value Register Value Register (REQUEST_VALUE) <Address : H'22> b15 14 13 12 11 10 9 8 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 7 6 5 4 3 2 1 b0 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - wValue b Bit name 15~0 wValue Value Function <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W Read Parameter of device request received in the setup stage Write Invalid (Ignored when written) x (1) wValue (Value) Bits (b15~b0) These bits store the wValue of the device request received at the setup stage of the control transfer. USB -37 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.18 Index Register Index Register (REQUEST_INDEX) <Address : H'24> b15 14 13 12 11 10 9 8 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 7 6 5 4 3 2 1 b0 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - wIndex b Bit name 15~0 wIndex Index Function <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W Read Parameter of device request received in the setup stage Write Invalid (Ignored when written) x (1) wIndex (Index) Bits (b15~b0) These bits store wIndex of the device request received in the setup stage of the control transfer. USB -38 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.19 Length Register Length Register (REQUEST_LENGTH) <Address : H'26> b15 14 13 12 11 10 9 8 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 7 6 5 4 3 2 1 b0 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - wlength b 0 0 - Bit name 15~0 wlength Length Function <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W Read Parameter of device request received in the setup stage Write Invalid (Ignored when written) x (1) wlength (Length) Bits (b15~b0) These bits store the wlength of the device request received at the setup stage of the control transfer. USB -39 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.20 Control Transfer Control Register Control Transfer Control Register (CONTROL_TRANSFER) b15 14 13 12 0 - 0 - 0 - CTRR 0 - b 14 6 9 8 0 - 0 - Ctr_Rd_Buf_Nmb 0 - 0 - 7 6 5 4 0 - 0 - 0 - CTRW CTRR Control Read Transfer Continuous Transmit Mode 0 - 3 0 - Function 0: 1: 2 1 b0 0 - 0 - Ctr_Wr_Buf_Nmb Single transmit mode Continuous transmit mode Reserved. Set it to "0". 13~8 5~0 10 Bit name 15 7 11 <Address : H'28> 0 - <H/W reset : H'0000> <S/W reset :-> <USB bus reset : -> R W 0 0 Ctr_Rd_Buf_Nmb Control Read Buffer Start Number The top block number for the Control Read buffer CTRW Control Write Transfer Continuous Receive Mode 0: 1: Unit receive mode Continuous receive mode Reserved. Set it to "0". Ctr_Wr_Buf_Nmb Control Write Buffer Start Number The top block number for the Control Write buffer 0 0 (1) CTRR (Control Read Transfer Continuous Transmit Mode) Bit (b15) This bit sets the transmit mode at data stage of the control read transfer. In case of single transmit mode, the transmit completes after transmitting one packet under the condition as follows: * Transmits the data equivalent to the size set by the EP0 Packet Size Register or transmits a short packet by setting the IVAL bit to "1". In case of continuous transmit mode, the transmit completes after transmitting several packets under the condition as follows: * Transmits the data equivalent to the size set by the EP0_FIFO Continuous Transmit Data Length Register or transmits a short packet by setting the IVAL bit to "1". In case of single transmit mode, the writing completes under the conditions as follows: * Writes the data equivalent to the size set by the EP0 Packet Size Register to the buffer (The IVAL bit of the EP0_FIFO Control Register changed to "1"). * Writes "1" to the IVAL bit of the EP0_FIFO Control Register. In case of continuous transmit mode, the writing completes under the conditions as follows: * Writes the data equivalent to the size set by the EP0_FIFO Continuous Transmit Data Length Register (The IVAL bit of the EP0_FIFO Control Register changed to "1"). * Writes "1" to the IVAL bit of the EP0_FIFO Control Register. The setting conditions of the IVAL bit of the EP0_FIFO Control Register change due to this bit. (2) Ctr_Rd_Buf_Nmb (Control Read Buffer Start Number) Bits (b13~b8) These bits set the beginning block number of the buffer to be used in control read transfer. The block number is a number by dividing the FIFO buffer into 64 byte sections (Note 1). When the mode is set to single transmit (CTRR bit = "0"), the blocks set by these bits only are used and, from the following block, it is possible to set to the buffer of a different endpoint. When the mode is set to continuous transmit (CTRR bit = "1"), the buffer equivalent to the size set by the EP0_FIFO Continuous Transmit Data Length Register (max. 256 bytes) is used from the block numbers set by these bits (Note 2). Note 1: The M66291GP is equipped with 3 Kbytes FIFO buffer and has blocks from H'0 to H'2F. Note 2: Make sure that several endpoints do not get overlapped in the same buffer area. USB -40 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (3) CTRW (Control Write Transfer Continuous Receive Mode) Bit (b7) This bit sets the receive mode at data stage of the control write transfer. In case of unit receive mode, the receive completes after receiving one packet under the condition as follows: * Receives the data equivalent to the size set by the EP0 Packet Size Register. * Receives a short packet. In case of continuous receive mode, the receipt completes after receiving several packets under the condition as follows: * Receives automatically the data equivalent to the size set by the EP0 Packet Size Register several times and receives the data equivalent to 256 bytes. * Receives the short packet. The setting conditions of the IVAL bit of the EP0_FIFO Control Register change due to this bit. (4) Ctr_Wr_Buf_Nmb (Control Write Buffer Start Number) Bits (b5~b0) These bits set the beginning? block number of the buffer to be used in control write transfer. The block number is a number for control by dividing the FIFO buffer into 64 byte sections (Note 1). When the mode is set to unit receive (CTRW bit = "0"), the blocks set by these bits only are used and, from the following block, it is possible to set to the buffer of a different endpoint. When the mode is set to continuous receive (CTRW bit = "1"), the buffer equivalent to 256 bytes is used from the block numbers set by these bits (Note 2). Note 1: The M66291GP is equipped with 3 Kbytes FIFO buffer and has blocks from H'0 to H'2F. Note 2: Make sure that several endpoints do not get overlapped in the same buffer area. USB -41 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.21 EP0 Packet Size Register EP0 Packet Size Register (EP0_PACKET_SIZE) <Address : H'2A> b15 14 13 12 11 10 9 8 7 6 5 4 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 3 2 1 b0 0 - 0 - 0 - EP0_MXPS b Bit name 15~7 Reserved. Set it to "0". 6~0 EP0_MXPS Maximum Packet Size Function 1 - <H/W reset : H'0008> <S/W reset : -> <USB bus reset : -> R W Upper limit of the transmit/receive data for one packet transfer (Settable only 8,16,32 and 64) 0 0 (1) EP0_MXPS (Maximum Packet Size) Bits (b6~b0) These bits set the upper limit (byte count) of the transmit/receive data for one packet transfer at data stage. Set the value of bMaxPacketSize0 transmitted to the host. At the time of transmitting, the data equivalent to the size set by these bits is read from the buffer for transmission. In case the buffer does not have the data equivalent to the size set by these bits, the data is transmitted as the short packet. At the time of receiving, the data equivalent to the size set by these bits is written to the buffer. If the received packet data is larger than the size set by these bits, the following bits are set to "1": * The EPB_EMP_OVR bit. (buffer empty/Size over error interrupt occurs when the EPB_EMPE bit is set to "1".) * The CTRT bit when the SERR bit is set to "1". (control transfer stage transition interrupt occurs.) Note: Set these bits after setting the response PID to NAK (EP0_PID bits = "00"). USB -42 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.22 Automatic Response Control Register Automatic Response Control Register (AUTO_RESPONSE_CONTROL) <Address : H'2C> b15 14 13 12 11 10 9 8 7 6 5 4 3 2 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - b Bit name 15~2 1 0 Function 1 b0 ASCN ASAD 0 - 0 - <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W Reserved. Set it to "0". ASCN SET_CONFIGURATION Automatic Response Mode 0: ASAD SET_ADDRESS Automatic Response Mode 0: 1: 1: 0 0 Invalid of automatic response mode for SET_CONFIGURATION Valid of automatic response mode for SET_CONFIGURATION Invalid of automatic response mode for SET_ADDRESS Valid of automatic response mode for SET_ADDRESS (1) ASCN (SET_CONFIGURATION Automatic Response Mode) Bit (b1) This bit sets the valid/invalid of automatic response mode for SET_CONFIGURATION request. With the automatic response mode set to valid, zero-length packet is automatically transmitted against the requests below at the status stage before notifying the normal completion. Here, the CTRT bit is not set to "1" (control transfer stage transition interrupt does not occur). * * SET_CONFIGURATION request of Configuration Value 0 in Address state SET_CONFIGURATION request of Configuration Value = 0 in Configured state No automatic response is executed when the SET_CONFIGURATION request other than the ones given above is received. In such case, the CTRT bit is set to "1" (control transfer stage transition interrupt occurs). When the state gets changed after receiving the aforesaid requests, the DVST bit is set to "1" if the SCFG bit is set to "1", irrespective of the validity of this function (device state transition interrupt occurs). (2) ASAD (SET_ADDRESS Automatic Response Mode) Bit (b0) This bit sets the valid/invalid of automatic response mode for SET_ADDRESS request. With the automatic response mode set to valid, zero-length packet is automatically transmitted against the requests below at the status stage before notifying the normal completion. Here, the CTRT bit is not set to "1" (control transfer stage transition interrupt does not occur). * SET_ADDRESS request at Default state No automatic response is executed when the SET_ADDRESS request other than the ones given above is received. In such case, the CTRT bit is set to "1" (control transfer stage transition interrupt occurs). When the state gets changed after receiving the aforesaid requests, the DVST bit is set to "1" if the SADR bit is set to "1", irrespective of the validity of this function (device state transition interrupt occurs). USB -43 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.23 EP0_FIFO Select Register EP0_FIFO Select Register (EP0_FIFO_SELECT) b15 14 13 12 11 0 - 0 - 0 - 0 - RCNT b 0 - 0 - 0 - 7 6 5 4 3 2 1 0 - 0 - 0 - 0 - 0 - 0 - 0 - ISEL Octl Register 8-Bit Mode 9~8 Reserved. Set it to "0". BSWP Byte Swap Mode <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W The ODLN bits are cleared by reading all receive data The ODLN bits are counted down by reading receive data 0 0 0: 1: EP0_FIFO Data Register is 16-bit mode EP0_FIFO Data Register is 8-bit mode 0 0 0: 1: Byte is treated as little ENDIAN Byte is treated as big ENDIAN 0 0 0: 1: Control write transfer Control read transfer Reserved. Set it to "0". ISEL Buffer Select 0 - 0: 1: Reserved. Set it to "0". 10 b0 BSWP Function RCNT Read Count Mode 14~11 0 8 Bit name 15 6~1 9 Octl 0 - 7 10 <Address : H'30> (1) RCNT (Read Count Mode) Bit (b15) This bit sets the countdown methods of the ODLN bits at the time of reading the EP0_FIFO Data Register. When this bit is set to "0", the ODLN bit value does not change in spite of reading the data from the EP0_FIFO Data Register, and is cleared to H'0 when all data is read out. When this bit is set to "1", the ODLN bit values are counted down every time the data is read from the EP0_FIFO Data Register. Here, the down-count value differs as shown below depending on whether the EP0_FIFO Data Register is set to 8-bit mode or 16-bit mode: * * Note 8-bit mode 16-bit mode : Down-count per "-1" : Down-count per "-2" : Use the *HWR/*BYTE pin or the Octl bit of this register for setting the 8-bit/16-bit mode. (2) Octl (Register 8-Bit Mode) Bit (b10) This bit sets the access mode of the EP0_FIFO Data Register. When this bit is set to "0", the EP0_FIFO Data Register is set to 16-bit mode, and all bits of the EP0_FIFO Data Register are valid. When this bit is set to "1", the EP0_FIFO Data Register is set to 8-bit mode, and the upper-order 8 bits of the EP0_FIFO Data Register (b15 to b8) are invalid. Set this bit before receiving the data. When set to control write transfer (ISEL bit = "0"), change this bit before receiving the data. When set to control read transfer (ISEL bit = "1"), if the E0req bit indicates "1", do not change this bit. This bit becomes invalid (fixed to 8-bit mode) when the mode is set to 8-bit by *HWR/*BYTE pin. In such case, this bit is read "0". USB -44 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (3) BSWP (Byte Swap Mode) Bit (b7) This bit sets the endian of the EP0_FIFO Data Register. When this bit is set to "0", the EP0_FIFO Data Register gets such as little endian. When this bit is set to "1", the EP0_FIFO Data Register gets such as big endian. Note: b15~b8 b7~b0 Little Endian odd number address even number address Big Endian even number address odd number address Don't set this bit to "1" when the mode is set to 8-bit (set by the Octl bit or *HWR/*BYTE pin). (4) ISEL (Buffer Select) Bit (b0) This bit selects the buffer transfer direction of the endpoint 0 used in the control transfer. When "0" is written to this bit, the buffer for control write transfer is valid. When "1" is written to this bit, the buffer for control read transfer is valid. USB -45 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.24 EP0_FIFO Control Register EP0_FIFO Control Register (EP0_FIFO_CONTROL) b15 14 EP0_PID 0 - 0 - 13 12 11 10 IVAL BCLR E0req CCPL 0 - 0 - 1 - 0 - b <Address : H'32> 9 8 7 6 5 0 - 0 - 0 - 0 - 0 - 4 3 2 1 b0 0 - 0 - 0 - 0 - ODLN Bit name 0 - Function <H/W reset : H'0800> <S/W reset : -> <USB bus reset : -> R W EP0_PID Response PID 00 : NAK 01 : BUF (Transmits response PID/data according to the state of buffer etc,) 1x : STALL 13 IVAL IN Buffer Set/OUT Buffer Status <When set to control write transfer> Read 0: Disables the reading of data from the buffer 1: Enables the reading of data from the buffer Write Invalid (Ignored when written) <When set to control read transfer> Read 0 : Incomplete to write the data to buffer 1 : Complete to write the data to buffer Write 0 : Invalid (Ignored when written) 1 : Complete to write the data to buffer (Forced completion : Transmits the short packet) 12 BCLR Buffer Clear <When set to control write transfer > Write 0 : Invalid (Ignored when written) 1 : Buffer clear (When the IVAL bit is set to "1") <When set to control read transfer> Write 0 : Invalid (Ignored when written) 1 : Buffer clear (Note : When the IVAL bit is set to "1", make sure to set the EP0_PID bits to "00" before executing the aforesaid operations.) 0 11 E0req EP0_FIFO Ready 0: 1: Enables to access EP0_FIFO Data Register etc, Disables to access EP0_FIFO Data Register etc, x 10 CCPL Control Transfer Control 0: 1: NAK response at status stage Normal completion response at status stage (ACK response/zero-length packet transmit) 0 0 x 15~14 9 8~0 Reserved. Set it to "0". ODLN Control Write Receive Data Length Stores the receive data length in control write transfer USB -46 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (1) EP0_PID (Response PID) Bits (b15~b14) These bits set the PID for response to the host at data/status stage of the control transfer. At setup stage, the ACK response is executed irrespective of these bits. Writing these bits are ignored when the VALID bit is equal to"1". When these bits are set to "00" * Data stage : NAK response * Status stage : NAK response When these bits are set to "01" <When set to control write transfer (ISEL bit = "0")> * Data stage : ACK response after receiving the data if the SIE side buffer can be ready to receive : NAK response if the SIE side buffer is not ready to receive In case the SIE side buffer is not ready to receive, the EPB_NRD bit is set to "1" when OUT token is received. *Status stage : Depends on CCPL bit <When set to control read transfer (ISEL bit = "1")> * Data stage : Transmits the data if the SIE side buffer is not ready to transmit : NAK response if the SIE side buffer is not ready to transmit In case the SIE side buffer is not ready to transmit, the EPB_NRD bit is set to "1" when IN token is received. *Status stage : Depends on CCPL bit When these bits are set to "1x" * Data stage : STALL response In case the SIE side buffer is not ready to receive/transmit, the EPB_NRD bit is set to "1" when OUT token is received. * Status stage : STALL response The NAK response is not executed even if these bits are set to "00" when the data is being received at data stage. The settings of these bits are reflected from the next transaction. Similarly, the transmission is not interrupted even if these bits are set to "00" when the data is being transmitted at data stage. Further, these bits are automatically set to the values below when the following states occur: l When setup token is received * "00" (NAK) l When the request set to automatic response (SET_ADDRESS or SET_CONFIGURATION) is received * "01" (BUF) The CCPL bit also is automatically set to "1" and transmits the zero-length packet at the succeeding status stage (IN transaction). l When sequence error occurs (CTSQ bits are set to "110") * "1x" (STALL) USB -47 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (2) IVAL (IN Buffer Set/OUT Buffer Status) Bit (b13) This bit indicates valid value when the E0req bit of this register is set to "0". lWhen set to control write transfer (ISEL bit = "0") When this bit is set to "1", the buffer is at CPU side and can be read. This bit is set to "1" at completion of receiving data. The conditions of receive completion depend on the CTRW bit. When this bit is set to "1", the EPB_RDY bit is set to "1" (buffer ready interrupt occurs). This bit is cleared to "0" due to one of the reasons as follows: * Reads out all the data received in the CPU side buffer. * Writes "1" to the BCLR bit. Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. lWhen set to control read transfer (ISEL bit = "1") When this bit is set to "0", the buffer is at CPU side and can be written. This bit is cleared to "0" due to one of the reasons as follows: * Transmits completely SIE side buffer. * Writes "1" to the BCLR bit. The transmit completion is changed by the CTRR bit. When this bit is set to "0" if the EPB_EMPE bit is set to "1", the EPB_EMP_OVR bit is set to "1" (buffer empty/size over error interrupt occurs). This bit is set to "1" due to one of the reasons as follows: * Completely writes the transmit data to CPU side buffer. * Writes "1" to this bit. When "1" is written to this bit, the write is forcibly completed. When some written data exists in the buffer, that data is transmitted as the short packet. Here, if the buffer is empty or cleared, the zero-length packet is transmitted. The buffer can be cleared using the BCLR bit. Further, the zero-length packet can be transmitted by writing "1" simultaneously to this bit and to the BCLR bit. In this case the buffer is cleared by setting "1" to BCLR bit, and this bit is cleared to "0" after the zero-length packet is transmitted. The write completion also is changed by the CTRR bit. Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. (3) BCLR (Buffer Clear) Bit (b12) This bit clears the data written to the CPU side buffer. lWhen set to control write transfer (ISEL bit = "0") When the IVAL bit is set to "1", the following operations are executed by writing "1" to this bit: * Clears CPU side buffer. * Clears the IVAL bit of this register. * Clears the ODLN bits of this register. lWhen set to control read transfer (ISEL bit = "1") When the IVAL bit is set to "0", the following operations are executed by writing "1" to this bit: * Clears CPU side buffer. Further, the zero-length packet can be transmitted by writing "1" simultaneously to this bit and to the IVAL bit. For details, refer to "IVAL bit". When the IVAL bit is set to "1", the following operations are executed by writing "1" to this bit: * Clears SIE side buffer (Unlike the other endpoints, the SIE side buffer can also be cleared by this bit). * Clears the IVAL bit of this register. USB -48 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers Note: When the IVAL bit is set to "1", make sure to set the EP0_PID bits to "00" before executing the aforesaid operations. This bit automatically returns to "0" after the buffer is cleared. Note: Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. In case the transmit data exists in the buffer for EP0_FIFO, the buffer empty interrupt occurs in the concerned endpoint when "1" is written to the BCLR bit. (4) E0req (EP0_FIFO Ready) Bit (b11) When this bit is equal to "1", this bit indicates the states as follows: * EP0_FIFO Data Register can not be accessed. * The IVAL bit value of this register is invalid. * The ODLN bit values of this register are invalid. Make sure that this bit is equal to "0" before accessing the aforesaid registers/bits. (5) CCPL (Control Transfer Control) Bit (b10) This bit controls the status stage of the control transfer. When this bit is set to "1", the operations below are executed at status stage of the control transfer and notifies the normal completion of the control transfer: lWhen set to control write transfer (ISEL bit = "0") * Transmits the zero-length packet after receiving IN token if the EP0_PID bits are set to "01". lWhen set to control read transfer (ISEL bit = "1") * ACK response to the host after receiving the zero-length packet following OUT token if the EP0_PID bits are set to "01". When this bit is set to "0", NAK response is executed to the host after receiving the IN token/OUT token at status stage of the control transfer. This bit is automatically cleared to "0" by receiving the setup token. (6) ODLN (Control Write Receive Data Length) Bits (b8~b0) These bits are valid for control write transfer and indicate the data number (byte count) received from the CPU side buffer. Further, these bits are set to execute countdown when the EP0_FIFO Data Register is read out. This operation changes according to the RCNT bit. For details, refer to "RCNT bit". These bits indicate the valid value when the E0req bit of this register is equal to "0". USB -49 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.25 EP0_FIFO Data Register EP0_FIFO Data Register (EP0_FIFO_DATA) <Address : H'34> b15 14 13 12 11 10 9 ? - ? - ? - ? - ? - ? - ? - 8 7 6 5 4 3 2 1 b0 ? - ? - ? - ? - ? - ? - ? - EP0_FIFO b ? - ? - Bit name Function <H/W reset : H'????> <S/W reset : -> <USB bus reset : -> R W <When set to control write transfer> Read Reads receive data <When set to control read transfer> Write Writes transmit data Note:The upper 8 bits (b15 to b8) become invalid in the 8-bit-mode (using the Octl bit of the EP0_FIFO Select Register or *HWR/*BYTE pin). 15~0 EP0_FIFO EP0_FIFO Data (1) EP0_FIFO (EP0_FIFO Data) Bits (b15~b0) The receive data from the CPU side buffer is read or the transmit data to the CPU side buffer is written through this register. When set to control write transfer (ISEL bit = "0"), the receive data from the buffer is read through this register. When set to control read transfer (ISEL bit = "1"), the transmit data to the buffer is written through this register. Make sure that the E0req bit is set to "0" before reading/writing these bits. Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. USB -50 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.26 EP0 Continuous Transmit Data Length Register EP0 Continuous Transmit Data Length Register (EP0_SEND_LEN) <Address : H'36> b15 14 13 12 11 10 9 8 7 6 5 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 4 3 2 1 b0 0 - 0 - 0 - 0 - SDLN b Bit name 15~9 Reserved. Set it to "0". 8~0 SDLN Control Read Continuous Transmit Data Length 0 - Function Control read continuous transmit data length <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W 0 0 (1) SDLN (Control Read Continuous Transmit Data Length) Bits (b8~b0) These bits are valid when the EP0 is set to continuous transmit mode (CTRR bit = "1") at the time of control read transfer (ISEL bit = "1"). These bits set the total byte count of the data transmitted (over multiple transactions) during data stage of control read transfer. These bits can be set to maximum 256 bytes. When total byte count exceeds 256, set the 256 bytes and the excess byte in several cycles. When the integral multiples of the value set by the EP0 Packet Size Register is set to these bits, the zerolength packet is automatically added after all data are transmitted. The zero-length packet is not automatically added if the SDLN are set to 256 to transmit 256 bytes data or more. Write to the buffer after setting this bit. Set these bits before writing to the buffer. USB -51 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.27 CPU_FIFO Select Register CPU_FIFO Select Register (CPU_FIFO_SELECT) b15 14 13 0 - 0 - RCNT 12 <Address : H'40> 11 10 9 8 0 - 0 - 0 - 0 - RWND 0 - b 0 - 7 6 BSWP Octl 0 - 0 - Bit name 15 0: 1: 12 3 2 0 - 0 - 0 - 0 - 1 b0 CPU_EP 0 - 0 - <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W The CPU_DTLN bits are cleared by reading all receive data The CPU_DTLN bits are counted down by reading receive data Reserved. Set it to "0". RWND Buffer Rewind 11~8 4 Function RCNT Read Count Mode 14~13 5 0 0 <When set to OUT buffer> Write 0 : Invalid (Ignored when written) 1 : Clears the buffer reading pointer <When set to IN buffer> Write 0 : Invalid (Ignored when written) 1 : Clears the buffer writing pointer 0 0 0 7 Reserved. Set it to "0". BSWP Byte Swap Mode 0: 1: Byte is treated as little ENDIAN Byte is treated as big ENDIAN 6 Octl Register 8-Bit Mode 0: 1: CPU_FIFO Data Register is 16-bit mode CPU_FIFO Data Register is 8-bit mode 5~4 Reserved. Set it to "0". 3~0 CPU_EP CPU Access Endpoint Designate 0001 :EP1 (Endpoint 1) 0010 :EP2 (Endpoint 2) 0011 :EP3 (Endpoint 3) 0100 :EP4 (Endpoint 4) 0101 :EP5 (Endpoint 5) 0110 :EP6 (Endpoint 6) Other than those above : Invalid 0 0 (1) RCNT (Read Count Mode) Bit (b15) This bit sets the countdown methods of the CPU_DTLN bits at the time of reading the CPU_FIFO Data Register. When this bit is set to "0", the CPU_DTLN bit value does not change in spite of reading the data from the CPU_FIFO Data Register, and is cleared to H'0 when all data is read out. When this bit is set to "1", the CPU_DTLN bit values are counted down every time the data is read from the CPU_FIFO Data Register. Here, the down-count value differs as shown below depending on whether the CPU_FIFO Data Register is set to 8-bit mode or 16-bit mode: * * Note 8-bit mode 16-bit mode : Down-count per "-1" : Down-count per "-2" : Use the *HWR/*BYTE pin or the Octl bit of this register for setting the 8-bit/16-bit mode. USB -52 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (2) RWND (Buffer Rewind) Bit (b12) This bit rewinds (initializes) the buffer pointer. lWhen set to OUT buffer (EPi_DIR bit = "0") When the IVAL bit of the CPU_FIFO Control Register is set to "1", the buffer reading pointer can be initialized by writing "1" to this bit. This enables reading of the receive data from the beginning. lWhen set to IN buffer (EPi_DIR bit = "1") When the IVAL bit of the CPU_FIFO Control Register is set to "0", the buffer writing pointer can be initialized by writing "1" to this bit. This enables resetting of the transmit data from the beginning. The operation is equivalent to the case when "1" is set to the BCLR bit if set to IN buffer. (3) BSWP (Byte Swap Mode) Bit (b7) This bit sets the endian of the CPU_FIFO Data Register. When this bit is set to "0", the CPU_FIFO Data Register gets such as little endian. When this bit is set to "1", the CPU_FIFO Data Register gets such as big endian. Note: b15~b8 b7~b0 Little Endian odd number address even number address Big Endian even number address odd number address Do not set this bit to "1" when the mode is set to 8-bit (set by the Octl bit or *HWR/*BYTE pin). (4) Octl (Register 8-Bit Mode) Bit (b6) This bit sets the access mode of the CPU_FIFO Data Register. When this bit is set to "0", the CPU_FIFO Data Register is set to 16-bit mode, and all bits of the CPU_FIFO Data Register are valid. When this bit is set to "1", the CPU_FIFO Data Register is set to 8-bit mode, and the upper-order 8 bits of the CPU_FIFO Data Register (b15 to b8) are invalid. When set to OUT buffer (EPi_DIR bit = "0"), change this bit before receiving the data. When set to IN buffer (EPi_DIR bit = "1"), if the Creq bit is equal to "1", do not change this bit. This bit becomes invalid (fixed to 8-bit mode) when the mode is set to 8-bit by *HWR/*BYTE pin. In such case, this bit is read "0". Note: The access width of the CPU_FIFO Data Register is controlled by the logical sum of this bit and the EPi_Octl bits of the EPi Configuration Register 1 specified by the CPU_EP bits. Hence, the mode is set to 8-bit if "1" is set to either this bit or to the EPi_Octl bits of the EPi Configuration Register 1. Make sure that both bits must be set to "0" to change to 16-bit mode. (5) CPU_EP (CPU Access Endpoint Designate) Bits (b3~b0) These bits select the endpoint accessed by CPU. Make sure that the endpoint selection does not get overlapped with the selection by the DMA_EP bits. When making a change in these bits to select the other the endpoint, make sure that the source endpoint and the destination endpoint to be changed are not under the access by the CPU or during receiving/transmitting of SIE (under access to FIFO buffer). USB -53 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.28 CPU_FIFO Control Register CPU_FIFO Control Register (CPU_FIFO_CONTROL) b15 0 - 14 13 12 11 IDLY IVAL BCLR Creq 0 - 0 - 0 - 1 - b 10 9 8 7 6 0 - 0 - 0 - 0 - 0 - 5 4 3 2 1 b0 0 - 0 - 0 - 0 - 0 - CPU_DTLN Bit name 0 - Function 15 Reserved. Set it to "0". 14 IDLY Isochronous Transmit Delay Set 0: 1: 13 IVAL IN Buffer Set/OUT Buffer Status 12 11 10~0 <Address : H'42> <H/W reset : H'0800> <S/W reset : -> <USB bus reset : -> R W 0 0 <When set to OUT buffer> Read 0: Disables reading data from the buffer 1: Enables reading data from the buffer Write Invalid (Ignored when written) <When set to IN buffer> Read 0 : Incomplete to write the data to buffer 1 : Complete to write the data to buffer Write 0 : Invalid (Ignored when written) 1 : Complete to write the data to buffer (Forced completion : Transmits short packet) BCLR Buffer Clear <When set to OUT buffer> Write 0 : Invalid (Ignored when written) 1 : Buffer clear (When the IVAL bit is set to "1") <When set to IN buffer> Write 0 : Invalid (Ignored when written) 1 : Buffer clear (When the IVAL bit is set to "0") 0 Creq CPU_FIFO Ready 0: 1: x CPU_DTLN CPU_FIFO Receive Data Length Register Stores the receive data length (byte count) x Disable of IDLY function Enable of IDLY function Enables accessing CPU_FIFO Data Register etc, Disables accessing CPU_FIFO Data Register etc, USB -54 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (1) IDLY (Isochronous Transmit Delay Set) Bit (b14) In isochronous transfer, transmission can be started by writing "1" to this bit or to the IVAL bit after writing the transmit data to the buffer (Note). When "1" is written to this bit, the data is transmitted by receiving the IN token after confirming the received SOF packet. After the data transmit starts, this is cleared to "0" (Refer to Figure 2.11). When "1" is written to the IVAL bit of this register, the data is transmitted by receiving the next IN token (Refer to Figure 2.12). Note: Set the transmit data size + 1 byte or more to the EPi_MXPS bits. When set to transmit data size, the IVAL bit is set to "1" when the writing to the buffer completes. Hence, this function is not applicable when set to 1023 bytes, the maximum value of the EPi_MXPS bits. Flame #m SOF IN l l l l l l Flame #(m+1) SO F l l l IDLY="1" set IN l l l l l l Transmit start Figure 2.11 Transmit start timing at IDLY bit = "1" Flame #m SOF IN l l l IVAL="1" set l l l l l l T ransmit start Figure 2.12 Transmit start timing at IVAL bit = "1" (2) IVAL (IN Buffer Set/OUT Buffer Status) Bit (b13) This bit indicates valid value when the Creq bit of this register is equal to "0". This bit sets/clears the EPB_RDY bit to "1" (Refer to "EPB_RDY bit"). lWhen set to OUT buffer (EPi_DIR bit = "0") When this bit is set to "1", the receive data in the CPU side buffer is ready to be read. This bit is set to "1" due to one of the reasons as follows: When set to single buffer mode (EPi_DBLB bit = "0") * Completes receiving (SIE side buffer). * Writes "1" to the TGL bit. When set to double buffer mode (EPi_DBLB bit = "1") * Completes receiving of SIE side buffer and reading of CPU side buffer. * Writes "1" to the TGL bit. The receive completion is changed by the EPi_RWMD bit. This bit is cleared to "0" due to one of the reasons as follows: * Reads out all the receive data in the CPU side buffer. * Writes "1" to the BCLR bit. * Writes "1" to the ACLR bit. Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. USB -55 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers lWhen set to IN buffer (EPi_DIR bit = "1") When this bit is set to "0", the CPU side buffer is ready to write the transmit data. This bit is cleared to "0" due to one of the reasons as follows: When set to single buffer mode (EPi_DBLB bit = "0") * Completes transmitting of SIE side buffer. * Writes "1" to the SCLR bit. * Writes "1" to the ACLR bit. When set to double buffer mode (EPi_DBLB bit = "1") * Completes transmitting of SIE side buffer and writing of CPU side buffer. * Writes "1" to the SCLR bit. * Writes "1" to the ACLR bit. * Writes "1" to the BCLR bit. The transmit completion is changed by the EPi_RWMD bit. This bit is set to "1" due to one of the reasons as follows: * Completes writing the transmit data to CPU side buffer. * Writes "1" to this bit. When "1" is written to this bit, the write operation is forcibly completed. When some written data exists in the buffer, that data is solely transmitted as the short packet. Here, if the buffer is empty or cleared, the zero-length packet is transmitted. The buffer can be cleared using the BCLR bit. Further, the zero-length packet can be transmitted by writing "1" simultaneously to this bit and to the BCLR bit. In this case the buffer is cleared by setting "1" to BCLR bit, and this bit is cleared to "0" after the zero-length packet is transmitted. The write completion also is changed by the EPi_RWMD bit. (3) BCLR (Buffer Clear) Bit (b12) This bit clears the data written to the CPU side buffer. lWhen set to OUT buffer (EPi_DIR bit = "0") When the IVAL bit is set to "1", the following operations are executed by writing "1" to this bit: * Clears CPU side buffer. * Clears the IVAL bit of this register. * Clears the CPU_DTLN bits of this register. lWhen set to IN buffer (EPi_DIR bit = "1") When the IVAL bit is set to "0", the following operations are executed by writing "1" to this bit: * Clears CPU side buffer. Further, the zero-length packet can be transmitted by writing "1" simultaneously to this bit and to the IVAL bit. For details, refer to "IVAL bit". This bit automatically returns to "0" after the buffer is cleared. Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. (4) Creq (CPU_FIFO Ready) Bit (b11) When this bit is equal to "1", this bit indicates the states as follows: * CPU_FIFO Data Register can not be accessed. * The IVAL bit value of this register is invalid. * The CPU_DTLN bit values of this register are invalid. Make sure that this bit is equal to "0" before accessing the aforesaid registers/bits. USB -56 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (5) CPU_DTLN (CPU_FIFO Receive Data Length Register) Bits (b10~b0) These bits are valid against the endpoint set to the OUT buffer (EPi_DIR bit = "0") and indicates the receive data number (byte count) in the CPU side buffer. Further, these bits are set to execute countdown when the CPU_FIFO Data Register is read out. This operation changes according to the RCNT bit of the CPU_FIFO Select Register. For details, refer to "RCNT bit". These bits indicate the valid value when the Creq bit of this register is equal to "0". Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. USB -57 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.29 CPU_FIFO Data Register CPU_FIFO Data Register (CPU_FIFO_DATA) b15 14 13 12 11 10 9 ? - ? - ? - ? - ? - ? - ? - <Address : H'44> 8 7 6 5 4 3 2 1 b0 ? - ? - ? - ? - ? - ? - ? - CPU_FIFO b ? - ? - Bit name 15~0 Function CPU_FIFO CPU_FIFO Data <H/W reset : H'????> <S/W reset : -> <USB bus reset : -> R W <When set to OUT buffer> Read Reads receive data <When set to IN buffer> Write Writes transmit data Note:The upper 8 bits (b15 to b8) become invalid in the 8-bit mode (using the Octl bits or *HWR/*BYTE pin). (1) CPU_FIFO(CPU_FIFO Data) Bits (b15~b0) The receive data from the CPU side buffer is read or the transmit data to the CPU side buffer is written through this register. When set to OUT buffer (EPi_DIR bit = "0"), the receive data from the CPU side buffer is read through this register. When set to IN buffer (EPi_DIR bit = "1"), the transmit data to the CPU side buffer is written through this register. Make sure that the Creq bit is equal to "0" before reading/writing these bits. Note: Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. When set to 16-bit mode, the M66291GP is capable of recognizing the byte data written. Hence, it is possible to transmit the odd byte data by setting "1" to the IVAL bit after writing the byte data. USB -58 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.30 SIE_FIFO Status Register SIE_FIFO Status Register (SIE_FIFO_STATUS) b15 14 0 - 0 - 13 12 11 TGL SCLR Sreq 0 - 0 - 0 - b <Address : H'46> 10 9 8 7 6 0 - 0 - 0 - 0 - 0 - 4 3 2 1 b0 0 - 0 - 0 - 0 - 0 - SIE_DTLN Bit name 15~14 5 0 - Function <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W Reserved. Set it to "0". 0 0 13 TGL Buffer Toggle <When set to OUT buffer> Write 0 : Invalid (Ignored when written) 1 : Forces the buffer to toggle in receive ready state to read ready state <When set to IN buffer> Write 0 : Invalid (Ignored when written) 1 : Inhibited 0 12 SCLR Buffer Clear <When set to OUT buffer> Write 0 : Invalid 1 : Inhibited <When set to IN buffer> 0 : Invalid (Ignored when written) 1 : Clears the buffer in transmit ready state 0 11 Sreq SIE_FIFO Ready 0: 1: x SIE_DTLN SIE_FIFO Receive Data Length Receive data length of SIE internal FIFO x 10~0 Enables to be write to TGL bit/SCLR bit Disables to be write to TGL bit/SCLR bit This register is valid against the endpoint set by the CPU_EP bits. (1) TGL (Buffer Toggle) Bit (b13) This bit is valid against the endpoint set to the OUT buffer (EPi_DIR bit = "0") and is used for continuous transmit/receive mode (EPi_RWMD = "1"). Do not write "1" when set to the IN buffer (EPi_DIR bit = "1") When "1" is written to this bit, the SIE side buffer is forced to complete receiving. The buffer is toggled, irrespective of the presence/absence of the CPU side buffer data (causing the SIE side buffer to complete receiving and to get toggled, and the IVAL bit to set to "1"). Make sure that the buffer data in the CPU side are not cleared. Here, the EPB_RDY bit also is set to "1" (buffer ready interrupt occurs). Note: Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. Make sure that the response PID is set to NAK (EPi_PID bits = "00") and the Sreq bit to "0" before writing "1" to this bit. USB -59 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (2) SCLR (Buffer Clear) Bit (b12) This bit is valid against the endpoint set to the IN buffer (EPi_DIR bit = "1"). Do not write "1" when set to the OUT buffer (EPi_DIR bit = "0") The SIE side buffer is cleared by writing "1" to this bit. Note: Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. Make sure that the response PID is set to NAK (EPi_PID bits = "00") and the Sreq bit to "0" before writing "1" to this bit. (3) Sreq (SIE_FIFO Ready) Bit (b11) This bit indicates to enable/disable of writing to the TGL bit and SCLR bit. When this bit is set to "1", do not write to the TGL bit and SCLR bit. (4) SIE_DTLN (SIE_FIFO Receive Data Length) Bits (b10~b0) These bits are valid against the endpoint set to the OUT buffer (EPi_DIR bit = "0") and indicates the receive data number (byte count) in the SIE side buffer (renewed after every ACK transmit). Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. USB -60 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.31 Dn_FIFO Select Registers (n=0~1) D0_FIFO Select Register (D0_FIFO_SELECT) D1_FIFO Select Register (D1_FIFO_SELECT) b15 BUST 0 - 14 13 DFORM 0 - 12 11 RWND ACKA 0 - b 0 - 10 REQA 0 - 0 - <Address : H'48> <Address : H'50> 9 8 7 INTM DMAEN BSWP 0 - 0 - 0 - 6 5 4 3 2 0 - 0 - 0 - 0 - Octl 0 - Bit name 1 b0 DMA_EP Function 0 - 0 - <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W BUST Burst Mode 0: 1: Cycle Steal Transfer Burst Transfer DFORM Transfer Method 00 : 01 : 10 : 11 : Controls by DACK signal and read/write signal Controls by DACK signal only Controls by chip select/address signal and read/write signal Reserved 12 RWND Buffer Rewind <When set to OUT buffer> Write 0 : Invalid (Ignored when written) 1 : Clears the buffer reading pointer <When set to IN buffer> Write 0 : Invalid (Ignored when written) 1 : Clears the buffer writing pointer 0 11 ACKA DACK Polarity 0: 1: "L" active "H" active 10 REQA DREQ Polarity 0: 1: "L" active "H" active 9 INTM DMA Interrupt Mode 0: 1: Sets "1" to EPB_RDY bit by completion of DMA transfer Sets "1" to EPB_RDY bit by completion of receiving 8 DMAEN DMA Enable 0: 1: Disable DMA transfer Enable DMA transfer (assertion of DREQ signal) 7 BSWP Byte Swap Mode 0: 1: Byte is treated as little ENDIAN Byte is treated as big ENDIAN 6 Octl Register 8-Bit Mode 0: 1: Dn_FIFO Data Register is 16-bit mode Dn_FIFO Data Register is 8-bit mode 15 13~14 5~4 Reserved. Set it to "0". 3~0 DMA_EP DMA Transfer Endpoint Designate 0001 :EP1 (Endpoint 1) 0010 :EP2 (Endpoint 2) 0011 :EP3 (Endpoint 3) 0100 :EP4 (Endpoint 4) 0101 :EP5 (Endpoint 5) 0110 :EP6 (Endpoint 6) Other than those above : Invalid USB -61 0 0 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (1) BUST (Burst Mode) Bit (b15) When set to cycle steal transfer, the assertion and negation of the DREQ signal are repeated every time the signal is subjected to DMA transfer (8-bit or 16-bit) when the CPU side buffer can be accessed. The negation is executed when the Dn_FIFO Data Register is accessed. When set to burst transfer, it keeps on asserting the DREQ signal until the reading/writing of the CPU side buffer completes when the CPU side buffer can be accessed. It is possible to forcibly complete the writing and then enabling transmit of short packet by asserting the TC signal at the time of writing. (2) DFORM (Transfer Method) Bit (b14~b13) These bits select the DMA transfer method. lWhen set to "00" At the time of reading, the data of the Dn_FIFO Data Register is available while the DACK signal is at "L" and the read signal at "L". At the time of writing, the data is written to the Dn_FIFO Data Register when the DACK signal is at "L" and by the rising edge of write signal. lWhen set to "01" Only the DACK signal is used and the Read/Write signal is not used (the Read/Write signal is ignored). At the time of reading, the data of the Dn_FIFO Data Register is available while the DACK signal is at "L". At the time of writing, the data is written to the Dn_FIFO Data Register by the rising edge of DACK signal. lWhen set to "10" In place of the DACK signal (the DACK signal is ignored here), the address signal can be used to read/write the data of the Dn_FIFO Data Register. At the time of reading, the data of the Dn_FIFO Data Register is available when the read signal is at "L". At the time of writing, the data is written to the Dn_FIFO Data Register by the rising edge of write. When the endpoint set to the OUT buffer (EPi_DIR bit = "0") is assigned to the DMA_EP, writing operation to the Dn_FIFO Data Register is ignored. Similarly, when the endpoint set to the IN buffer (EPi_DIR bit = "1") is assigned to the DMA_EP, reading operation to the Dn_FIFO Data Register is ignored (undefined value is read). (3) RWND (Buffer Rewind) Bit (b12) This bit rewinds (clears) the buffer pointer. lWhen set to OUT buffer (EPi_DIR bit = "0") When the IVAL bit of the Dn_FIFO Control Register is set to "1", the buffer reading pointer can be cleared by writing "1" to this bit. This enables reading of the receive data from the beginning. lWhen set to IN buffer (EPi_DIR bit = "1") When the IVAL bit of the Dn_FIFO Control Register is set to "0", the buffer writing pointer can be cleared by writing "1" to this bit. This enables resetting of the transmit data from the beginning. (4) ACKA (DACK Polarity) Bit (b11) This bit sets the DACK signal polarity. (5) REQA (DREQ Polarity) Bit (b10) This bit sets the DREQ signal polarity. USB -62 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (6) INTM (DMA Interrupt Mode) Bit (b9) This bit sets the timing of setting "1" to the EPB_RDY bit. <When set to OUT buffer (EPi_DIR bit = "0")> When this bit is set to "0", the EPB_RDY bit is set to "1" after reading all buffer data including the received short packet (including the zero-length packet) <buffer ready interrupt occurs>. In case of reading the buffer, the buffer state as well as the bits below are retained. This enables the reading of the received data length using the buffer ready interrupt. * IVAL bit of the Dn_FIFO Control Register ("1" retained) * DMA_DTLN bits of the Dn_FIFO Control Register It is necessary to write "1" to the BCLR bit and to clean the buffer in order to receive the next data. Thus clears the IVAL bit to "0", and the EPB_RDY bits also are cleared if the RDYM bit is set to "0". If the RDYM bit is set to "1", the EPB_RDY bits are cleared to "0" by writing "0" to the EPB_RDY bit. When this bit is set to "1", the EPB_RDY bit is set to "1" under the same conditions as the endpoint not specified by the DMA_EP bits (buffer ready interrupt occurs). <When set to IN buffer (EPi_DIR bit = "1")> When this bit is set to "0", the EPB_RDY bit cannot be set to "1". When this bit is set to "1", the EPB_RDY bit is set to "1" under the same conditions as the endpoint not specified by the DMA_EP bits (buffer ready interrupt occurs). Note: Do not use with DMAEN = "0" when this bit is set to "0". (7) DMAEN (DMA Enable) Bit (b8) This bit sets the enable/disable of the output of the DREQ signal for DMA transfer. When this bit is set to "1", the DMA transfer is set to enable mode, making the DREQ signal ready for assertion. When this bit is written to "0", the DMA transfer is disabled, allowing no output of DREQ signal. Note: Do not use with INTM = "0" when this bit is set to "0". (8) BSWP (Byte Swap Mode) Bit (b7) This bit sets the endian of the Dn_FIFO Data Register. When this bit is set to "0", the Dn_FIFO Data Register gets such as little endian. When this bit is set to "1", the Dn_FIFO Data Register gets such as big endian. Note: b15~b8 b7~b0 Little Endian odd number address even number address Big Endian even number address odd number address Don't set this bit to "1" when the mode is set to 8-bit (set by the Octl bit or *HWR/*BYTE pin). USB -63 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (9) Octl (Register 8-Bit Mode) Bit (b6) This bit sets the access mode of the Dn_FIFO Data Register. When this bit is set to "0", the Dn_FIFO Data Register is set to 16-bit mode, and all bits of the Dn_FIFO Data Register are valid. When this bit is set to "1", the Dn_FIFO Data Register is set to 8-bit mode, and the upper-order 8 bits of the Dn_FIFO Data Register (b15 to b8) are invalid. When set to OUT buffer (EPi_DIR bit = "0"), change this bit before receiving the data. When set to IN buffer (EPi_DIR bit = "1"), if the Dreq bit is equal to "1", do not change this bit. This bit becomes invalid (fixed to 8-bit mode) when the mode is set to 8-bit by *HWR/*BYTE pin. In such case, this bit is read "0". Note: Note: The access width of the Dn_FIFO Data Register is controlled by the logical sum of this bit and the EPi_Octl bits of the EPi Configuration Register 1 specified by the DMA_EP bits. Hence, the mode is set to 8-bit if "1" is set to either this bit or to the EPi_Octl bits of the EPi Configuration Register 1. Make sure that both bits must be set to "0" to change to 16-bit mode. Do not change this bit while accessing the Dn_FIFO Data Register. (10) DMA_EP (DMA Transfer Endpoint Designate) Bits (b3~b0) These bits select the endpoint of DMA transfer. Make sure that the endpoint selection does not get overlapped with the selection by the CPU_EP bits. When making a change in these bits to select the other endpoint, make sure that the source endpoint and the destination endpoint to be changed are not under the access by the CPU/DMA or during receiving/transmitting of SIE (under access to FIFO buffer). USB -64 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.32 Dn_FIFO Control Registers (n=0~1) D0_FIFO Control Register (D0_FIFO_CONTROL) D1_FIFO Control Register (D1_FIFO_CONTROL) b15 14 TRCLR TREN 0 - 0 - 13 12 11 IVAL BCLR Dreq 0 - 0 - 1 - b <Address : H'4A> <Address : H'52> 10 9 8 7 6 0 - 0 - 0 - 0 - 0 - 5 4 3 2 1 b0 0 - 0 - 0 - 0 - 0 - DMA_DTLN Bit name 0 - Function <H/W reset : H'0800> <S/W reset : -> <USB bus reset : -> R W 15 TRCLR Transaction Count Clear Write 0 : Invalid (Ignored when written) 1 : Clears the DMAn_Transaction Count Register 0 14 TREN Transaction Count Enable 0: 1: 13 IVAL IN Buffer Set/OUT Buffer Status <When set to OUT buffer> Read 0: Disables the reading of data from the buffer 1: Enables the reading of data from the buffer Write Invalid (Ignored when written) <When set to IN buffer> Read 0 : Incomplete to write the data to buffer 1 : Complete to write the data to buffer Write 0 : Invalid (Ignored when written) 1 : Complete to write the data to buffer (Forced completion : Transmits short packet) 12 BCLR Buffer Clear <When set to OUT buffer> Write 0 : Invalid (Ignored when written) 1 : Buffer clear (When the IVAL bit is set to "1") <When set to IN buffer> Write 0 : Invalid (Ignored when written) 1 : Buffer clear 0 11 Dreq D_FIFO Ready 0: 1: x DMA_DTLN D_FIFO Receive Data Length Register Stores the receive data length (byte count) x 10~0 Disable of transaction count function Enable of transaction count function Enables to access Dn_FIFO Data Register Disables to access Dn_FIFO Data Register (1) TRCLR (Transaction Count Clear) Bit (b15) When written to "1", this bit clears the value of the DMAn_Transaction Count Register. The writing of "1" to this bit is not retained and is automatically cleared to "0". (2) TREN (Transaction Count Enable) Bit (b14) This bit sets the enable/disable of transaction count function. Refer to "2.34 DMAn_Transaction Count Registers (n=0~1)". USB -65 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (3) IVAL (IN Buffer Set/OUT Buffer Status) Bit (b13) This bit indicates valid value when the Dreq bit of this register is equal to "0". The operation of this bit is the same as that of the IVAL bit of the CPU_FIFO Control Register. Take care the setting of the EPB_RDY bit to "1" using this bit (buffer ready interrupt occurs) changes according to the INTM bit (Refer to "EPB_RDY/INTM bit"). (4) BCLR (Buffer Clear) Bit (b12) This bit indicates valid value when the Dreq bit of this register is set to "0". The operation of this bit is the same as that of the BCLR bit of the CPU_FIFO Control Register. (5) Dreq (D_FIFO Ready) Bit (b11) When this bit is equal to "1", this bit indicates the states as follows: * Dn_FIFO Data Register can not be accessed. * The IVAL bit value of this register is invalid. * The DMA_DTLN bit values of this register are invalid. Make sure that this bit is equal to "0" before making access to the aforesaid registers/bits. (6) DMA_DTLN (D_FIFO Receive Data Length Register) Bits (b10~b0) These bits are valid against the endpoint set to the OUT buffer (EPi_DIR bit = "0") and indicates the receive data number (byte count) in the CPU side buffer. These bits indicate the valid value when the Dreq bit of this register is equal to "0". Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. USB -66 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.33 Dn_FIFO Data Registers (n=0~1) D0_FIFO Data Register (D0_FIFO_DATA) D1_FIFO Data Register (D1_FIFO_DATA) <Address : H'4C> <Address : H'54> b15 14 13 12 11 10 9 8 ? - ? - ? - ? - ? - ? - ? - ? - 7 6 5 4 3 2 1 b0 ? - ? - ? - ? - ? - ? - ? - D_FIFO b ? - Bit name 15~0 Function D_FIFO D_FIFO Data <H/W reset : H'????> <S/W reset : -> <USB bus reset : -> R W <When set to OUT buffer> Read Reads receive data <When set to IN buffer> Write Writes transmit data Note:The upper 8 bits (b15 to b8) become invalid in the 8-bit mode (using the Octl bits or *HWR/*BYTE pin). (1) D_FIFO(D_FIFO Data) Bits (b15~b0) The receive data from the CPU side buffer is read or the transmit data to the CPU side buffer is written through this register. When set to OUT buffer (EPi_DIR bit = "0"), the receive data from the CPU side buffer is read through this register. When set to IN buffer (EPi_DIR bit = "1"), the transmit data to the CPU side buffer is written through this register. Make sure that the Dreq bit is equal to "0" before reading/writing these bits when the DMAEN bit is set to "0". Note: Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. When set to 16-bit mode, the M66291GP is capable of recognizing the byte data written. Hence, it is possible to transmit the odd byte data by setting "1" to the IVAL bit or asserting the TC pin after writing the byte data. USB -67 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.34 DMAn_Transaction Count Registers (n=0~1) DMA0_Transaction Count Register (DMA0_TRN_COUNT) DMA1_Transaction Count Register (DMA1_TRN_COUNT) b15 14 13 12 11 10 9 8 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - <Address : H'4E> <Address : H'56> 7 6 5 4 3 2 1 b0 0 - 0 - 0 - 0 - 0 - 0 - 0 - TRNCNT b 0 - Bit name 15~0 TRNCNT Transaction Count Function <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W <TREN bit = "0"> Packet count that completes the receiving (behaving as the compare register) <TREN bit = "1"> Read The number of the received packets (behaving as the current register) Write Packet count that completes the receiving (behaving as the compare register) (1) TRNCNT (Transaction Count) Bits (b15~b0) This register is used under the following conditions: * When set to OUT buffer (EPi_DIR bit = "0"). * When set to continuous receive mode (EPi_RWMD bit = "1"). * When set to bulk transfer mode (EPi_TYP bits = " 01") * When accessing using Dn_FIFO Data Register. With the transaction count function set to be enabled (TREN bit = "1"), the following conditions are added to the buffer receive completion condition. In case of the receive completion, refer to the "EPi_RWMD bit of the EPi Configuration Register 0". * When the value set by this register conforms to the packet receive count. (Conformity between current register and compare register; See below.) This register is composed of two registers as follows: * Current register :Counting of the received packet number (counts up at the TREN bit = "1") * Compare register :The value that completes the receiving It is necessary to clear the TNCNT bits as the current register to "0" by writing "1" to the TRCLR bit before the next transfer. USB -68 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.35 FIFO Status Register FIFO Status Register (FIFO_STATUS) <Address : H'58> b15 14 13 12 11 10 9 8 7 6 5 4 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 3 2 1 b0 0 0 - 0 0 - 0 0 - EPB_STS b Bit name 15~7 Reserved. Set it to "0". 6~0 EPB_STS Endpoint 0~6 Buffer Status Function 0 0 - <H/W reset : H'0000> <S/W reset : H'0000> <USB bus reset : -> R W 0 Read 0: Disables the reading and writing of data to and from the buffer 1: Enables the reading and writing of data to and from the buffer 0 x (1) EPB_STS (Endpoint 0~6 Buffer Status) Bits (b6~b0) The condition for setting this bit to "1" is the same as that of the Interrupt Status Register 1. Make sure that the condition for clearing this bit to "0" differs as follows. The condition for clearing this bit to "0" is always the same as in the case of the RDYM bit set to "0". Hence, the presence/absence of data in the buffer can be confirmed by reading these bits even after the interrupt is cleared by writing "0" to the Interrupt Status Register 1. USB -69 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.36 Port Control Register Port Control Register (PORT_CNTL) b15 14 13 12 0 - 0 - 0 - 0 - 11 <Address : H'5A> 10 9 8 7 6 5 4 0 - 0 - 0 - 0 - 0 - 0 - 0 - PIEN b 0 - 14~8 7 0 - Function Reserved. Set it to "0". PIEN Port Input Enable PDIR Port Direction 1 b0 0 - 0 - 0 - <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W 0 0 0 : Disable Port Input 1 : Enable Port Input The port number corresponds to the bit number. b8 :P0 pin b9 :P1 pin b10 :P2 pin b11 :P3 pin b12 :P4 pin b13 :P5 pin b14 :P6 pin 0 0 0 : Input Port 1 : Output Port The port number corresponds to the bit number. b0 :P0 pin b1 :P1 pin b2 :P2 pin b3 :P3 pin b4 :P4 pin b5 :P5 pin b6 :P6 pin Reserved. Set it to "0". 6~0 2 PDIR Bit name 15 3 The port pins, P0 ~ P6, automatically turn to input/output ports by setting to 8-bit bus interface mode (controlled by HWR/BYTE pin). When set to 16-bit bus interface mode, all functions of this register become invalid. Further, the writing into this register at 16-bit bus interface mode becomes invalid while the reading becomes H'0000. USB -70 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (1) PIEN (Port Input Enable) Bits (b14~b8) These bits set the enable/disable of port input. When "0" is written to this bit, the related port pin does not work as the input pin even if the PDIR bit of this register is set to "0". In this case the related port pin is in the high-impedance state. In this state, the port data is read out as "0". When the PDIR bit of this register is set to "0", the related port pin works as the input pin by writing "1" to this bit. When the PDIR bit of this register is set to "1", these bits become invalid (and works as an output port). (2) PDIR (Port Input/Output Select) Bits (b6~b0) These bits select input/output direction of the port pin. USB -71 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.37 Port Data Register Port Data Register (PORT_DATA) <Address : H'5C> b15 14 13 12 11 10 9 8 7 6 5 4 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 3 2 1 b0 0 - 0 - 0 - PDAT b Bit name 15~7 Reserved. Set it to "0". 6~0 PDAT Port Data 0 - Function 0 : "L" level 1 : "H" level The port number corresponds to the bit number. b0 : P0 pin b1 : P1 pin b2 : P2 pin b3 : P3 pin b4 : P4 pin b5 : P5 pin b6 : P6 pin <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W 0 0 The port pins, P0 ~ P6, automatically turn to input/output ports by setting to 8-bit bus interface mode (controlled by HWR/BYTE pin). When set to 16-bit bus interface mode, all functions of this register become invalid. Further, the writing into this register at 16-bit bus interface mode becomes invalid while the reading becomes H'0000. (1) PDAT (Port Data) Bits (b6~b0) These bits indicate the port pin state. When the PIEN bit of the Port Control Register is set to "0", this bit reads out "0". USB -72 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.38 Drive Current Adjust Register Drive Current Adjust Register (I_ADJ) <Address : H'5E> b15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - b0 LDRV b Bit name 15~1 0 Function Reserved. Set it to "0". LDRV Drive Current Adjust 0: 1: When IOVcc=2.7~3.6V When IOVcc=4.5~5.5V 0 - <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W 0 0 (1) LDRV (Drive Current Adjust) Bit (b0) This bit is used to adjust the drive current of the output pins. The output pins here refer to D15/A0, D14/P6~D8/P0, D7~D0, *INT0, *INT1/*SOF, *Dreq0, and *Dreq1 pins. USB -73 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.39 EPi Configuration Registers 0 (i=1~6) EP1 Configuration Register 0 (EP1_0CONFIG) EP2 Configuration Register 0 (EP2_0CONFIG) EP3 Configuration Register 0 (EP3_0CONFIG) EP4 Configuration Register 0 (EP4_0CONFIG) EP5 Configuration Register 0 (EP5_0CONFIG) EP6 Configuration Register 0 (EP6_0CONFIG) b15 14 EPi_TYP 0 - 0 - 13 12 EPi_DIR EPi_ ITMD 0 - 0 - b 11 10 <Address : H'60> <Address : H'64> <Address : H'68> <Address : H'6C> <Address : H'70> <Address : H'74> 9 8 EPi_Buf_siz 0 - 0 - 7 6 5 4 0 - 0 - EPi_ EPi_ DBLB RWMD 0 - 0 - 0 - 0 - Bit name 3 2 1 b0 0 - 0 - EPi_Buf_Nmb 0 - Function 0 - <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> R W EPi_TYP Transfer Type 00 : 01 : 10 : 11 : Invalid Bulk transfer Interrupt transfer Isochronous transfer 13 EPi_DIR Transfer Direction 0: 1: OUT buffer (Receives data from the host) IN buffer (Transmits data to the host) 12 EPi_ITMD Interrupt Toggle Mode 0: 1: Enable data resend function (normal toggle mode) Disable data resend function (forced toggle mode) EPi_Buf_siz Buffer Size Endpoint buffer size 7 EPi_DBLB Double Buffer Mode 0: 1: Single buffer mode Double buffer mode 6 EPi_RWMD Continuous Transmit/Receive Mode 0: 1: Single transmit /receive mode Continuous transmit/receive mode EPi_Buf_Nmb Buffer Start Number The top block number of buffer 15~14 11~8 5~0 (1) EPi_TYP (Transfer Type) Bits (b15~b14) These bits are used to set the transfer type of the endpoint. (2) EPi_DIR (Transfer Direction) Bit (b13) This bit is used to set the transfer direction of the endpoint. After switching the transfer direction, clear the buffer by the BCLR bit. (3) EPi_ITMD (Interrupt Toggle Mode) Bit (b12) This bit sets the enable/disable of data resend function at interrupt transfer. This bit can be set to "1" only when the transfer type is set to interrupt transfer (EPi_TYP bits = "10"). Set this bit to "0" for other transfer modes. When the data resend function is set to disable, the new data is transmitted at the next transmission by toggling the DATA PID and the buffer, even if the ACK is not received after transmitting the data at interrupt transfer. Here, the IVAL bit is cleared to "0" and the EPB_RDY bit is set to "1" (buffer ready interrupt has occurred). When the data resend function is set to enable, the normal toggle sequence is executed. When the transmission completes normally, the DATA PID and the buffer got toggled to transmit the next data. In case ACK cannot be received after the data is transmitted, the DATA PID and the buffer do not get toggle, and the same data in the buffer is resent. USB -74 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (4) EPi_Buf_siz (Buffer Size) Bits (b11~b8) These bits set the buffer size in 64-byte unit (Note). When set to double buffer mode (EPi_DBLB bit = "1"), the buffer double in size set by these bits is used. Set the values to these bits as follows: * Continuous transmit/receive mode : Value set by this register > Value set by the EPi_MXPS bits * Single transmit/receive mode : Value set by this register Value set by the EPi_MXPS bits Set in the manner as follows (single transmit/receive mode only) to write "1" to the IDLY bit at isochronous transfer mode (set by EPi_TYP bits): * Single transmit/receive mode : Value set by this register > Value set by the EPi_MXPS bits When set to IN buffer (EPi_DIR bit = "1"), if the integral multiples of the value set by the EPi_MXPS bits is set to these bits, the zero-length packet can be added after all data are transmitted. For details, refer to the setting of "1" to the EPi_NULMD bit. Note: The M66291GP is equipped with 3 Kbytes FIFO buffer. The Maximum buffer size is 1024Bytes for an endpoint, and the minimum one is 64Bytes. (5) EPi_DBLB (Double Buffer Mode) Bit (b7) This bit sets the single buffer mode/double buffer mode. This bit is applicable to bulk/isochronous/interrupt transfers (set by the EPi_TYP bits). When set to double buffer mode, 2 buffers of size set by the EPi_Buf_siz bits are secured and are allocated to SIE side buffer and CPU side buffer. lDouble buffer mode when set to OUT buffer (EPi_DIR bit = "0") SIE side buffer: * The data received by SIE can be written. * Can not be accessed by CPU/DMA. CPU side buffer: * Can not be accessed by SIE. * The received data can be read by CPU/DMA. Buffer toggle condition (switching of SIE side buffer and CPU side buffer) * SIE side buffer receive completion and CPU side buffer read completion (empty) The receive completion changes according to the single/continuous transmit/receive mode. For details, refer to the "EPi_RWMD bit" and the "TGL bit". lDouble buffer mode when set to IN buffer (EPi_DIR bit = "1") SIE side buffer: * SIE can transmit the written data. * Can not be accessed by CPU/DMA. CPU side buffer: * Can not be accessed by SIE. * CPU/DMA can write the data for transmission. Buffer toggle condition (switching of SIE side buffer and CPU side buffer) * CPU side buffer write completion and SIE side buffer transmit completion (empty) The write and transmit completion changes according to the single/continuous transmit/receive mode. For details, refer to the "EPi_RWMD bit". Note: Refer to "3.2 FIFO Buffer" for CPU/SIE side. USB -75 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers (6) EPi_RWMD (Continuous Transmit/Receive Mode) Bit (b6) This bit sets the transmit/receive mode at bulk transfer. This bit can be set to "1" only when the transfer type is set to bulk transfer (EPi_TYP bits = "01"). Set to "0" for other transfer modes. lWhen set to OUT buffer (EPi_DIR bit = "0") In case of single transmit/receive mode, the receive completes after receiving one packet under the conditions as follows: * Receives the data equivalent to the size set by the EPi_MXPS bits. * Receives the short packet (including the zero-length packet). In case of continuous transmit/receive mode, the receive completes after receiving several packets under the conditions as follows: * Receives automatically the data equivalent to the size set by the EPi_MXPS bits several times and receives the data equivalent to the byte set by the EPi_Buf_siz bit. * Receives the short packet (including the zero-length packet). * When the value set by the DMAn_Transaction Count Register conforms to the packet receiving count. lWhen set to IN buffer (EPi_DIR bit = "1") In case of single transmit/receive mode, the transmit completes after transmitting one packet under the conditions as follows: * Transmits the data equivalent to the size set by the EPi_MXPS bits or the zero-length packet. In case of continuous transmit/receive mode, the transmit completes after transmitting several packets under the conditions as follows: * Transmits automatically the data equivalent to the size set by the EPi_MXPS bits several times and transmits the data equivalent to the byte set by the EPi_Buf_siz bit. In case of single transmit/receive mode, the write completes under the conditions as follows: * Writes the data equivalent to the size set by the EPi_MXPS bits to the buffer (IVAL bit changed to "1"). * Writes "1" to the IVAL bit of the CPU_FIFO Control/Dn_FIFO Control Register. In case of continuous transmit/receive mode, the write completes under the conditions as follows: * Writes the data equivalent to the size set by the EPi_Buf_siz bit to the buffer (IVAL bit changed to "1"). * Writes "1" to the IVAL bit. The set/clear conditions of the IVAL bit change according to this bit. (7) EPi_Buf_Nmb (Buffer Start Number) Bits (b5~b0) These bits set the beginning block number of the buffer. The block number is a number by dividing the FIFO buffer into 64 byte sections (Note 1). The domain set by the EPi_Buf_siz bit from the block set by these bits is secured as the buffer (Note 2). Note 1: The M66291GP is equipped with 3 Kbytes FIFO buffer and has the blocks from H'0 to H'2F. Note 2: Make sure that several endpoints may not get overlapped in the same buffer area. USB -76 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers 2.40 Epi Configuration Registers 1 (i=1~6) EP1 Configuration Register 1 (EP1_1CONFIG) EP2 Configuration Register 1 (EP2_1CONFIG) EP3 Configuration Register 1 (EP3_1CONFIG) EP4 Configuration Register 1 (EP4_1CONFIG) EP5 Configuration Register 1 (EP5_1CONFIG) EP6 Configuration Register 1 (EP6_1CONFIG) b15 14 13 EPi_PID 0 - 0 - 12 11 EPi_ EPi_ NULMD ACLR 0 - b 0 - 10 <Address : H'62> <Address : H'66> <Address : H'6A> <Address : H'6E> <Address : H'72> <Address : H'76> 9 8 7 6 0 - 0 - 0 - 1 - EPi_ Octl 0 - 0 - 4 3 2 1 b0 0 - 0 - 0 - 0 - EPi_MXPS Bit name 15~14 5 EPi_PID Response PID 0 - 0 - Function <H/W reset : H'0040> <S/W reset : -> <USB bus reset : -> R W 00 : NAK 01 : BUF (Transmits response PID/data according to the state of buffer etc,) 1x : STALL 13 Reserved. Set it to "0". 0 0 12 EPi_NULMD Zero-Length Packet Addtion Transmit Mode 0: 1: Disable to transmit zero-length packet automatically Enable to transmit zero-length packet automatically 11 EPi_ACLR OUT Buffer Automatic Clear Mode 0: 1: Exit buffer clear mode Buffer clear mode Make sure to set "0" after setting "1". 10 EPi_Octl Register 8-Bit Mode 0: 1: CPU/Dn_FIFO Data Register is 16-bit mode CPU/Dn_FIFO Data Register is 8-bit mode 9~0 EPi_MXPS Maximum Packet Size Upper size limit of the data transmitted/received in one packet Interrupt transfer :0~64 Bulk transfer :only 8,16,32 and 64 Isochronous transfer :0~1023 (1) EPi_PID (Response PID) Bits (b15~b14) These bits set the PID to be responded to the host. These bits are valid only when the transfer type is set to bulk transfer mode or interrupt transfer mode (EPi_TYP bits = "01" or "10"). Set these bits to "01" at isochronous transfer mode (EPi_TYP bits = "11"). When these bits are set to "00", the NAK response is executed, regardless of the buffer state. When these bits are set to "01"; <When set to OUT buffer (EPi_DIR bit = "0")> * ACK response after receiving the data with the SIE side buffer in the receive ready state. * NAK response with the SIE side buffer in the receive not ready state. When the SIE side buffer is not in receive ready state, if the OUT token is received, the EPB_NRD bit is set to "1". <When set to IN buffer (EPi_DIR bit = "1")> * Transmits the data with the SIE side buffer in transmit ready state. * NAK response with the SIE side buffer not in the transmit ready state. When the SIE side buffer is in the transmit not ready state, if the IN token is received, the EPB_NRD bit is set to "1". When these bits are set to "1x", the STALL response is executed, regardless of the buffer state. USB -77 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 2. Registers When set to OUT buffer, if a data exceeding the maximum packet size is received, regardless of these bit values, these bits are set automatically to "1x" (STALL). (2) EPi_NULMD (Zero-Length Packet Addtion Transmit Mode) Bit (b12) This bit is valid at continuous transmit/receive mode (EPi_RWMD bit = "1") when set to IN buffer (EPi_DIR bit = "1"). Set to "0" for the other modes. In case of the completion of SIE side buffer transmit, if the IVAL bit is set to "0", the zero-length packet automatically transmitted in the last under the condition as follows: * When the buffer size set by the EPi_Buf_siz bit is the integral multiple of the size set by the EPi_MXPS bits. In case of the continuous transmit/receive mode, the data equivalent to the size set by the EPi_MXPS bits is automatically transmitted several times before transmitting the data equivalent to the size set by the EPi_Buf_siz bit. (3) EPi_ACLR (OUT Buffer Auto-Clear Mode) Bit (b11) When set to OUT buffer (EPi_DIR bit = "0"), all buffers both of CPU and SIE sides are cleared by setting "1" to this bit. This bit does not get automatically cleared to "0" even after the buffers are cleared. When this bit is set to "1", if BUF is set to the EPi_PID bits, the NAK response is not executed against the received OUT token. Instead, the ACK response is sent to the host after receiving the data. The received data is not written to the buffer. Further, with the EPi_PID bits set to NAK/STALL, the NAK/STALL response is executed. When set to IN buffer (EPi_DIR bit = "1"), only the SIE side buffer and the buffer with the writing completed (the buffer when IVAL bit = "1") are cleared by setting "1" to this bit. When this bit is set to "1", if BUF is set to the EPi_PID bits, the NAK response is given against the received IN token. Further, with the EPi_PID bits set to NAK/STALL, the NAK/STALL response is executed. Note: When set to IN buffer, make sure to set the response PID to NAK (EPi_PID bits = "00") before setting this bit to "1". (5) EPi_Octl (Register 8-Bit Mode) Bit (b10) This bit has the same function as the Octl bit of the CPU_FIFO Select Register or the Octl bit of the Dn_FIFO Select Register. Please refer to the items of these registers. (6) EPi_MXPS (Maximum Packet Size) Bits (b9~b0) These bits set the upper limit (byte count) of the data transmitted and received in one packet transfer. Set the wMaxPacketSize value transmitted to the host. In case of transmitting, the data equivalent to the size set by these bits is read out from the buffer for transmit. If the buffer does not have the data equivalent to the set by these bits, the data is transmitted as the short packet. In case of receiving, the received data equivalent to the size set by these bits is written to the buffer. In case the received data exceeds the size set by these bits, the following bit is set to "1": * The EPB_EMP_OVR bit (buffer empty/size-over error interrupt occurs when the EPB_EMPE bit is set to "1"). Note: Set this bit after setting the response PID to NAK (EPi_PID bits = "00"). USB -78 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3. M66291 OPERATIONS 3.1 Interrupt Function There are 8 factors of interrupts in the M66291. For details, refer to the "Interrupt Status Registers 0 to 3". The enable/disable of interrupt can be set by the Interrupt Enable Registers 0 to 3. Each bit of the Interrupt Status Register is set to "1" according to the factor even if the Interrupt Enable Registers 0 to 3 are set to interrupt inhibit mode. The list of interrupts in M66291 is given in Table 3.1 and the diagrams related to the interrupt in Figure 3.1. Table 3.1 List of Interrupts Status Bit (Interrupt Name) Interrupt Factor Related Item VBUS (Vbus Interrupt) Change of Vbus input level (change of "L"->"H", "H"->"L") Confirmation of Vbus pin input state by the Vbus bit of the Interrupt Status Register 0 RESM (Resume Interrupt) Change of USB bus state in suspend state ("J"->"K" or "SE0") Confirmation of current device state by the DVSQ bits of the Interrupt Status Register 0 SOFR (SOF Detect Interrupt) Receive of SOF packet DVST (Device State Transition Interrupt) * Detection of USB bus reset * Detection of suspend state * Execution of "SET_ADDRESS" * Execution of "SET_CONFIGURATION" Confirmation of current device state by the DVSQ bits of the Interrupt Status Register 0 CTRT (Control Transfer Stage Transition Interrupt) * Transition of control write transfer status stage * Transition of control read transfer status stage * Completion of control transfer * Occurrence of control transfer sequence error * Completion of setup stage Confirmation of current control transfer stage state by the CTSQ bits of the Interrupt Status Register 0 BEMP (Buffer Empty / Size Over Interrupt) * Transmit of all the data stored in the buffers at each endpoint * Receive of packet exceeding the maximum packet size during receiving data packet Confirmation of endpoint number occurred the interrupt by the EPB_EMP_OVR bits of the Interrupt Status Register 3 INTN (Buffer Not Ready Interrupt) When NAK response is automatically executed because of the buffer not ready state in the IN/OUT token of each endpoint Confirmation of endpoint number occurred the interrupt by the EPB_NRDY bits of the Interrupt Status Register 2. INTR (Buffer Ready Interrupt) When each endpoint is buffer ready state (read /write enable state) Confirmation of endpoint number of the occurred interrupt by the EPB_RDY bits of the Interrupt Status Register 1. USB -79 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS VBSE INT0 INT1 Edge/level generator circuit INT0/INT1 assign circuit VBUS RSME RESM URST SOFE SOFR USB reset occur SADR DVSE DVST SET_ADDRESS detect SCFG SET_CONFIGURATION detect SUSP Suspend detect W DST RDST CTRE CTRT CMPL Control write transfer Status stage transition Control read transfer Status stage transition Control transfer com plete SERR Control transfer sequence error Setup stage com plete <<<Interrupt Enable Register 3>>> EPB_EMPE b6 ~ b1 b0 <<Interrupt Status Register 3>>> EPB_EMP_OVR b6 ~ BEMPE b1 BEMP b0 ReadOnly <<<Interrupt Enable Register 2>>> EPB_NRE b6 ~ b1 b0 <<<Interrupt Status Register 2>>> EPB_NRDY b6 ~ INTNE b1 INTN b0 ReadOnly <<<Interrupt Enable Register 1>>> EPB_RE b6 ~ b1 b0 <<<Interrupt Status Register 1>>> EPB_RDY b6 ~ INTRE INTR ReadOnly Bit nam e <<<Interrupt Enable Register 0>>> Bit nam e <<<Interrupt Status Register 0>>> b1 b0 Figure 3.1 Interrupt Related Diagram USB -80 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.2 FIFO Buffer The M66291 has 6 endpoints available for bulk/interrupt/isochronous transfers in addition to endpoint 0 for control transfer. The M66291 is equipped with a total of 3 Kbytes FIFO that can be used as the buffer of the endpoint and can be assigned arbitrary byte count in 64-byte unit against each endpoint. 3.2.1 FIFO Buffer Configuration The endpoint buffer can be set for double buffer configuration and continuous transmit/receive mode. Each buffer configuration is set by the registers as follows: Endpoint 0: * Control Transfer Control Register * EP0 Packet Size Register * EP0_FIFO Continuous Transmit Data Length Register Endpoint 1~6: * EPi Configuration Register 0 * EPi Configuration Register 1 3.2.2 Buffer Access The buffers of endpoints 0 to 6 can be accessed by the four data registers as follows: <EP0_FIFO Data Register> * Quantity : 1 piece * Exclusively used for endpoint 0 <CPU_FIFO Data Register > * Quantity : 1 piece * Shared with endpoints 1 to 6 (specified by the CPU_EP bits) <Dn_FIFO Data Register > * Quantity : 2 pieces * Shared with endpoints 1 to 6 (specified by the DMA_EP bits) * Can be accessed by DMAC These four data registers can be set independently to 8-bit/16-bit mode by the Octl bit. USB -81 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.2.3 Buffer State and IVAL Bit (1) Buffer state and IVAL bit of the OUT buffer The relation between buffer state and IVAL bit is shown in Figure 3.2 when the buffer is set to OUT (set by the EPi_DIR bit/ISEL bit). The single/double buffer mode is set by the EPi_DBLB bit. The double buffer mode cannot be set at endpoint 0. l W hen set to O UT buffer <W hen set to single buffer mode> Response (Note 1) SIE bus ACK SIE side buffer CPU side buffer CPU bus Empty ACK NAK IVAL bit ="0" Receive data IVAL bit ="0" Receive data IVAL bit ="0" Receive com pletion (Note 2) NAK Receive data IVAL bit ="1" (EPB_RDY bit is set to "1") Receive data NAK IVAL bit ="1" Empty NAK IVAL bit ="0" Read com pletion Empty ACK IVAL bit ="0" <W hen set to double buffer mode> Response (Note 1) ACK ACK NAK SIE bus SIE side buffer Empty Receive data Receive data CPU side buffer CPU bus Empty IVAL bit ="0" Empty IVAL bit ="0" Empty IVAL bit ="0" Receiv e com pletion (Note 2) ACK ACK NAK Empty Receive data Receive data Receive com pletion (Note 2) ACK Empty ACK Empty ACK Empty Receive data Receive data Empty IVAL bit ="1" (EPB_RDYbit is set to"1") IVAL bit ="1" IVAL bit ="0" Read com pletion Receive data Receive data Empty IVAL bit ="1" (EPB_RDY bit is set to "1") IVAL bit ="1" IVAL bit ="0" Read com pletion Note 1. Response to the host when EP0_PID/EPn_PID bits are set to "01(BUF)". Note 2. About the receives completion, refer to the follows: l Endpoint 0 CT RW bit of Control Transfer Control Register l O thers endpoint 0 EPnRW MD bit of EPn Configuration Register Accessable Not accessable Figure 3.2 Relation between Buffer State and IVAL Bit (when set to OUT buffer) USB -82 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS (2) Buffer state and IVAL bit of the IN buffer The relation between buffer state and IVAL bit is shown in Figure 3.3 when the buffer is set to IN (set by the EPi_DIR bit/ISEL bit). The single/double buffer mode is set by the EPi_DBLB bit. The double buffer mode cannot be set at endpoint 0. l W hen set to IN buffer <W hen set to single buffer mode> Response (Note1) SIE bus SIE side buffer NAK CPU side buffer CPU bus Empty NAK NAK IVAL bit ="0" Transmit data IVAL bit ="0" T ransmit data IVAL bit ="1" W rite com pletion (Note 2) T ransmits data T ransmit data IVAL bit ="1" T ransmits data Transmit data IVAL bit ="1" Empty NAK IVAL bit ="1" Transm it com pletion (Note 2) Empty NAK IVAL bit ="0" (EPB_RDY bit is set to "1") <W hen set to double buffer mode > Response (Note 1) SIE bus SIE side buffer NAK Empty NAK Empty NAK Empty CPU side buffer CPU bus Empty T ransmit data T ransmit data IVAL bit ="0" IVAL bit ="0" IVAL bit ="1" W rite com pletion (Note 2) T ransmits data T ransmit data T ransmits data Transmit data NAK Empty Transm it com pletion (Note 2) Empty IVAL bit ="0" (EPB_RDY bit is set to "1") T ransmit data IVAL bit ="0" T ransmit data IVAL bit ="1" Write com pletion (Note 2) T ransmits data T ransmit data Empty IVAL bit ="0" (EPB_RDY bit is set to "1") T ransmits data Transmit data Empty IVAL bit ="0" Empty IVAL bit ="0" NAK Empty Transm it com pletion (Note 2) Note 1. Response to the host when EP0_PID/EPn_PID bits are set to "01(BUF)". Note 2. About the transmit/write completions, refer to the follows: l Endpoint 0 CT RR bit of Control T ransfer Control Register l O thers endpoint 0 EPnRW MD bit of EPn Configuration Register Accessable Not accessable Figure 3.3 Relation between Buffer State and IVAL Bit (when set to IN buffer) USB -83 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.2.4 IVAL Bit and EPB_RDY Bit The IVAL bit is available per endpoint. These IVAL bits can be specified by the CPU_EP bits and the DMA_EP bits, and the read/write is possible by the IVAL bit of the CPU_FIFO Control Register and the IVAL bit of the Dn_FIFO Control Register. The EPB_RDY bit can be set/cleared by the IVAL bit at each endpoint, irrespective of the aforesaid setting. Similarly, the EPB_NRDY bit and EPB_EMP_OVR bit can be set/cleared regardless of the CPU_EP bit/DMA_EP bit. Make sure that the "1" setting to the EPB_RDY bit of the endpoint specified by the DMA_EP bit changes according to the setting of the INTM bit. Fix Endpoint 0 EP0_FIFO Data Register IVAL IVAL bit IVAL IVAL bit Endpoint 1 (EP0_FIFO Control Register) CPU_FIFO Data Register (CPU_FIFO Control Register) Designates by CPU_EP bit Endpoint 2 D0_FIFO Data Register IVAL IVAL bit (D0_FIFO Control Register) Designates by DMA_EP bit Endpoint 3 D1_FIFO Data Register IVAL IVAL bit l l l l (D1_FIFO Control Register) l l l l Designates by DMA_EP bit Endpoint i Dn_FIFO Data Register IVAL IVAL bit (Dn_FIFO Control Register) Interrupt Status Register1 (EPB_RDY) Interrupt Status Register2 (EPB_NRDY) Interrupt Status Register 3 (EPB_EMP_O VR) FIFO Status Register (EPB_ST S) Figure 3.4 IVAL Bit and EPB_RDY Bit USB -84 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.3 USB Data Transfer Function Overview The M66291 is capable of executing the USB transfer by processing the operations as follows: (1) Response against the control transfer request (2) Enable of transmitting after storing the transmit data to the buffer Enable of receiving and reading the receive data from the buffer (3) Stall processing (4) Suspend/resume processing 3.3.1 Data Receive Function The data receiving operation of the setup transaction and the OUT transaction differs as follows. lSetup transaction (control transfer setup stage) The device request data received from the host (8 bytes) are stored to 4 different registers. Here, ACK response is executed to the host and the control transfer stage transition interrupt has occurred. lOUT transaction In the data packet after receiving OUT token from the host, when the buffer receives the packet of maximum size or the short packet, the ACK response is executed to the host and the buffer ready interrupt has occurred (ready for reading the receive data). When the buffer is not in the receive ready state, the buffer not ready interrupt has occurred. 3.3.2 Data Transmit Function The data transmit is executed on receiving the request for data transmit by the IN token packet. lIN transaction After the IN token is received from the host, the buffer data is transmitted. On completion of the buffer data transmit, the buffer ready interrupt has occurred (ready for writing the transmit data). When the buffer is not in transmit ready state, the buffer not ready interrupt has occurred. 3.3.3 Data Transfer Sequence The data written to the FIFO Data Register are transmitted to the USB bus in the order of LSB first. The same is true when the data received from the USB bus is stored to the FIFO Data Register. 1 b0 16 b1 b2 b3 b4 b5 b6 b7 b8 USB -85 b9 b10 b11 b12 b13 b14 b15 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.3.4 DMA Transfer Overview The M66291 is capable of DMA transfer in 16-bit/8-bit width (specified by the Octl bit) against the endpoint 1 to 6. The DREQ pin is asserted when the endpoint buffer set to the Dn_FIFO Select Register is in read/write ready state. The output of DREQ pin is enabled by the DMAEN bit. In order to write the data to transmit the short packet by the DMA_FIFO, assert the TC pin or set the IVAL bit to "1" after writing last data. Further, when read by using DMA, the timing of the buffer ready interrupt occurrence can be changed by the INTM bit. 3.3.5 DMA Transfer Method The DMA transfer method is set by the DFORM bit of the Dn_FIFO Control Register. (1) Cycle Steal Mode (BUST bit = "0") At cycle steal mode, the DREQ pin is asserted at every transfer (8-bit/16-bit). (A-1) DMA transfer control by the DACK pin and read/write pins (DFORM bits = "00"): At this mode, the DACK pin and read/write pins are used to access to the Dn_FIFO Data Register of the M66291. (A-2) DMA transfer control solely by the DACK pin (DFORM bits = "01"): At this mode, only the DACK pin is used to access to the Dn_FIFO Data Register of the M66291. The read/write pins are not used in this mode (are ignored). (A-3) DMA transfer control by the chip select pin and the address pins (DFORM bits = "10"): In this mode, the address pins and read/write pins are used to access the Dn_FIFO Data Register of the M66291. The DACK pin is not used in this mode (is ignored). (2) Burst Mode (BUST bit = "1") At burst mode, the DREQ pin is asserted until all data in the buffer has been transferred , and is negated when the transfer completes. (B-1) DMA transfer control by the DACK pin and read/write pins (DEFORM bits = "00"): This mode operates with the same timing as (A-1). (B-2) DMA transfer control by the chip select pin and address pins (DEFORM bits = "10"): This mode operates with the same timing as (A-3). USB -86 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS (A-1) D FORM=00 W rite (A-1) DFORM=00 Read DMA_REQ DMA_REQ D MA_AC K DMA_ACK W rite Read Data Data Input Output * The read pin is ignored. * T he write pin is ignored. (A-2) DFORM=01 Read (A-2) D FORM=01 W rite DMA_REQ DMA_REQ D MA_AC K DMA_ACK Data Data Input O utput * The read/write pin is ignored. * T he read/write pin is ignored. (A-3) DFORM=10 Read (A-3) D FORM=10 W rite DMA_REQ DMA_REQ Address Valid address Address Valid address Read W rite Data Data Input Output * T he DMA_ACKn/read pin is ignored. * T he DMA_ACKn/write pin is ignored. Note: T his figure indicates the D MA_R EQ and DMA_ACK pins at "L" active. Figure 3.5 Access Timing at Cycle Steal Transfer (B-1) D FORM=00 W rite (B-1) DFORM=00 Read DMA_REQ DMA_REQ DMA_ACK DMA_ACK W rite Read Data Data Input Input Input Output * The read pin is ignored. (B-2) D FORM=10 W rite Output (B-2) DFORM=10 Read DMA_REQ DMA_REQ Address Output * The write pin is ignored. Address W rite Output Output Output Read Data Data Input Input Input : Valid address : Valid address * The DMA_ACK/read pin is ignored. * The DMA_ACK/write pin is ignored. Note: T his figure indicates the D MA_R EQ and DMA_ACK pins at "L" active. Figure 3.6 Access Timing at Burst Transfer USB -87 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.4 Control Transfer Overview The control transfer is composed of three stages as follows: (1) Setup stage (2) Data stage (some control transfers don't include) (3) Status stage The M66291 automatically controls the stages of the control transfers by the hardware and is capable of generating interrupt against the aforesaid stage transition. The control transfers are executed by the endpoint 0. The examples of control write transfer, control read transfer, control write no data transfer, control transfer error and continuous setup operations are shown in Figure 3.7 to Figure 3.12. (1) Setup stage The transition to the setup stage occurs when the setup token is received. The request data received at the setup stage (8 bytes) is automatically stored to four registers (Request, Value, Index and Length) before the ACK response is executed. For SET_ADDRESS request and SET_CONFIGURATION request, the M66291 can respond automatically to the host. As for the other requests, execute data analysis (decoding) and processing by the software after the setup stage complete interrupt has occurred. When the setup token is received, the VALID bit is set to "1", the EP0_PID and CCPL bits are changed as shown below, then these bits are protected until the VALID bit is cleared: * EP0_PID bits "00" : NAK response (response at data stage) * CCPL bit "0" : NAK response (response at status stage) (2) Data stage The transition to the data stage occurs when the IN token/OUT token is received after the setup stage. In case of the request with no data stage, the transition to the status stage executes by receiving the OUT token after the setup stage. * Control write transfer (OUT transaction) With the buffer set to receive ready state (buffer empty), the EP0_PID bits are set to "01" to make ACK response to the host after receiving the data. When the buffer is ready for data reading, the buffer ready interrupt occurs to enable reading of the receive data by the EP0_FIFO Data Register. * Control read transfer (IN transaction) With the buffer set to transmit ready state (buffer contains transmit data), the data is transmitted to the host by setting the EP0_PID bits to "01". When the buffer is ready to accept new transmit data, the buffer ready interrupt occurs. (3) Status stage The transition to the status stage occurs when IN token and OUT token are received after the data stage, causing the control write/read transfer status transition interrupt to occur. In this case, setting the EP0_PID bits to "01" and the CCPL bit to "1" enables to notify the normal completion to the host. In the case of the request with no data stage, this interrupt works as the setup stage complete interrupt. USB -88 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS USB bus SETUP ADDR EP DATA0 8 bytes data (CW) H/W state S/W procedure CRC5 CRC16 VALID='1' EP0_PID="00" CCPL='0' ACK Interrupt CTRT='1' CTSQ ="011" EP CTRT interrupt confirm CRC5 OUT ADDR DATA1 MAX packet size data CRC16 CTRT interrupt clear VALID clear Request data analysis CTRT='0' VALID='0' NAK VALID confirm EP VALID='1' CRC5 OUT ADDR DATA1 MAX packet size data VALID='0' CRC16 NAK EP0_PID = "01" OUT ADDR EP DATA1 MAX packet size data Execute the following processing on the basis of the request data analysis result. Set the EP0 response PID to BUF ("01"). Abandon request data analysis result Wait for the next CTRT interrupt CRC5 CRC16 ACK OUT ADDR EP CRC5 DATA0 Short packet data CRC16 ACK IN ADDR EP CRC5 ADDR EP CRC5 Interrupt INTR= '1' EPB_RDY[0]='1' EPB_RDY[0] interrupt confirm Read receive data from EP0_FIFO EPB_RDY[0]='0' Interrupt CTRT='1' CTSQ ="100" CTRT interrupt confirm CTRT interrupt clear NAK IN CTRT='0' NAK IN ADDR EP problem Transmit no-problem confirm CRC5 No-problem NAK IN ADDR DATA1 CRC16 EP CCPL = '1' CRC5 Set EP0 response PID to STALL ("1x") Set the CCPL (0 byte length data) ACK Interrupt CTRT='1' CTSQ ="000" SETUP : SETUP PID OUT : OUT PID IN : IN PID ADDR : USB address (H'00~H'7F) : Endpoint (H'0~H'3) EP CRC5 : 5 bits CRC DATA0 : DATA0 PID DATA1 : DATA1 PID CR : Control read transfer CW : Control write transfer ND : Control no data transfer CRC16 : 16 bits CRC CTRT interrupt confirm CTRT interrupt clear CTRT='0' ACK : ACK PID NAK : NAK PID STALL : STALL PID : Data to device from host : Data to host from device * Set the continuous transmit mode. Figure 3.7 Examples of Control Write Transition Operations USB -89 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS USB bus SETUP ADDR EP DATA0 8 bytes data (CR) H/W state S/W procedure CRC5 VALID='1' EP0_PID="00" CCPL='0' CRC16 ACK Interrupt CTRT='1' CTSQ ="001" IN ADDR EP CT RT interrupt confirm CTR T interrupt clear VALID clear R equest data analysis CRC5 CTRT='0' VALID='0' NAK VALID='1' VALID confirm IN ADDR EP CRC5 VALID='0' NAK EP W rite data to EP0_FIFO (IVAL='1') EP0_PID = "01" IN ADDR DATA1 MAX packet size data CRC5 Execute the following processing on the basis of the request data analysis result. 1. Set the transmit data to the EP0 FIFO 2. Set the EP0 response PID to BUF ("01") Abandon request data analysis result W ait for the next CTR T interrupt CRC16 ACK EP CRC5 IN ADDR DATA0 Short packet data CRC16 ACK Interrupt O UT ADDR DATA1 CRC16 EP CTRT='1' CTSQ ="010" CRC5 CT RT interrupt confirm CTR T interrupt clear CTRT='0' (0 byte length data) NAK Transmit no-problem confirm O UT ADDR DATA1 CRC16 EP problem CRC5 No-problem (0 byte length data) Set the C CPL CCPL = '1' ACK Set EP0 response PID to ST ALL("1x") Interrupt CTRT='1' CTSQ ="000" CT RT interrupt confirm CTR T interrupt clear CTRT='0' SET UP OUT IN ADD R EP CRC5 DAT A0 DAT A1 : : : : : : : : SET UP PID OU T PID IN PID USB address (H'00~H'7F) Endpoint (H'0~H'3) 5 bits CRC DATA0 PID DATA1 PID CR CW ND CR C16 AC K NAK ST ALL : : : : : : : Control read transfer Control write transfer Control no data transfer 16 bits C RC ACK PID NAK PID ST ALL PID : Data to device from host : Data to host from device Set the continuous transm it m ode. Figure 3.8 Examples of Control Read Transition Operations USB -90 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS USB bus EP H/W state S/W procedure CRC5 SETUP ADDR DATA0 8 bytes data (ND) VALID='1' EP0_PID="00" CCPL='0' CRC16 ACK Interrupt IN ADDR EP CRC5 EP CRC5 CTRT='1' CTSQ ="101" NAK IN ADDR CTRT interrupt confirm CTRT interrupt clear V ALID clear Request data analysis CTRT='0' VALID='0' VALID='1' VALID confirm NAK IN ADDR EP CRC5 ADDR EP CRC5 ADDR EP CRC5 VALID='0' NAK IN Request data analysis result confirm ed to have no-problem Abandon request data analysis result W ait for the next CTRT interrupt problem NAK No-problem IN NAK IN ADDR DATA1 CRC16 EP EP0_PID = "01" CCPL='1' CRC5 Execute the following processing on the basis of the request data analysis result. 1. Set the EP0 response PID to BUF ("01") 2. Set the CCPL Set EP0 response PID to S TALL("1x") (0 byte length data) ACK Interrupt CTRT='1' CTSQ ="000" CTRT interrupt confirm CTRT interrupt clear CTRT='0' SETUP OUT IN ADDR EP CRC5 DATA0 DATA1 : : : : : : : : SETUP PID OUT PID IN PID USB address (H'00~H'7F) Endpoint (H'0~H'3) 5 bits CRC DATA0 PID DATA1 PID CR CW ND CRC16 ACK NAK STA LL : : : : : : : Control read transfer Control write transfer Control no data transfer 16 bits CRC ACK PID NAK PID STALL PID : Data to device from host : Data to host from device Figure 3.9 Examples of No Data Control Transition Operations USB -91 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS USB bus EP H/W state S/W procedure CRC5 SETUP ADDR DATA0 8 bytes data (CR) VALID='1' EP0_PID="00" CCPL='0' CRC16 ACK Interrupt CTRT='1' CTSQ ="001" IN ADDR EP CTRT interrupt confirm CTRT interrupt clear VALID clear Request data analysis CRC5 CTRT='0' VALID='0' NAK V ALID='1' VALID confirm IN ADDR EP CRC5 VALID='0' Execute the following processing on the basis of the request data analysis result. 1. Set the transm it data to the EP0 FIFO 2. Set the EP0 response PID to BUF ("01") NAK OUT ADDR DATA1 CRC16 EP W rite data to EP0_FIFO (IVAL='1') EP0_PID = "01" CRC5 (0 byte length data) STALL Abandon request data analysis result W ait for the next CTRT interrupt Interrupt CTRT='1' CTSQ ="110" EP0_PID="10" CTRT interrupt confirm CTRT interrupt clear CTRT='0' EP CRC5 SETUP ADDR DATA0 8 bytes data(CR) VALID='1' EP0_PID="00" CCPL='0' CRC16 ACK Interrupt CTRT='1' CTSQ ="001" IN ADDR EP CRC5 CTRT interrupt confirm CTRT interrupt clear VALID clear Request data analysis NAK SETUP OUT IN ADDR EP CRC5 DATA0 DATA1 : : : : : : : : SETUP PID O UT PID IN PID USBaddress (H'00~H'7F) Endpoint (H'0~H'3) 5 bits CRC DATA0 PID DATA1 PID CR CW ND CRC16 ACK NAK STALL : : : : : : : Control read transfer Control write transfer Control no data transfer 16 bits CRC ACK PID NAK PID STALL PID : Data to device from host : Data to host from device Figure 3.10 Examples of Control Transfer Error Operations USB -92 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS USB bus EP H/W state S/W procedure CRC5 SETUP ADDR DATA0 8 bytes data (CR) VALID='1' EP0_PID="00" CCPL='0' CRC16 ACK Interrupt IN ADDR EP CTRT='1' CTSQ ="001" CRC5 NAK CTRT interrupt confirm CTRT interrupt clear VALID clear Request data analysis CTRT='0' VALID='0' SETUP DATA0 ADDR EP CRC5 VALID='1' 8 bytes data (CR) VALID confirm VALID='1' EP0_PID="00" CCPL='0' CRC16 ACK VALID='0' Interrupt CTRT='1' CTSQ ="001" IN ADDR EP CRC5 ADDR EP CRC5 ADDR EP CRC5 NAK IN A bandon request data analysis result W ait for the next CTRT interrupt CTRT interrupt confirm CTRT interrupt clear VALID clear Request data analysis NAK IN Execute the following processing on the basis of the request data analysis result. 1. Set the transm it data to the E P0 FIFO 2. Set the EP0 response PID to BUF ("01") VALID='1' VALID confirm NAK VALID='0' IN ADDR EP CRC5 NAK EP W rite data to EP0_FIFO (IVAL='1') EP0_PID = "01" CRC5 IN ADDR DATA1 MAX packet size data Execute the following processing on the basis of the request data analysis result. 1. Set the transm it data to the EP0 FIFO 2. Set the EP0 response PID to B UF ("01") A bandon request data analysis result W ait for the next CTRT interrupt CRC16 ACK SETUP OUT IN ADDR EP CRC5 DATA0 DATA1 : : : : : : : : SETUP PID OUT PID IN PID USB address (H'00~H'7F) Endpoint (H'0~H'3) 5 bits CRC DATA 0 PID DATA 1 PID CR CW ND CRC16 ACK NAK STALL : : : : : : : Control read transfer Control write transfer Control no data transfer 16 bits CRC ACK PID NA K PID STA LL PID : Data to device from host : Data to host from device Figure 3.11 Examples of Setup Continuous Operations (1) USB -93 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS USB bus EP H/W state S/W procedure CRC5 SETUP ADDR DATA0 8 bytes data (CR) VALID='1' EP0_PID="00" CCPL='0' CRC16 ACK Interrupt CTRT='1' CTSQ ="001" IN ADDR EP CTRT interrupt confirm CTRT interrupt clear V ALID clear Request data analysis CRC5 CTRT='0' VALID='0' NAK VALID='1' V ALID confirm IN ADDR EP CRC5 VALID='0' NAK EP W rite data to EP0_FIFO (IVAL='1') EP0_PID = "01" CRC5 IN ADDR DATA1 MAX packet size data E xecute the following processing on the basis of the request data analysis result. 1. Set the transm it data to the EP 0 FIFO 2. Set the EP0 response PID to BUF ("01") Abandon request data analysis result W ait for the next CTRT interrupt CRC16 ACK EP CRC5 SETUP ADDR DATA0 8 bytes data (CR) VALID='1' EP0_PID="00" CCPL='0' CRC16 ACK Interrupt CTRT='1' CTSQ ="001" IN ADDR EP CRC5 ADDR EP CRC5 CTRT interrupt confirm CTRT interrupt clear V ALID clear Request data analysis NAK IN VALID='1' V ALID confirm VALID='0' NAK EP CRC5 IN ADDR DATA1 MAX packet size data W rite data to EP0_FIFO (IVAL='1') EP0_PID = "01" CRC16 E xecute the following processing on the basis of the request data analysis result. 1. Clear the EP0_FIFO 2. Set the transm it data to the EP 0 FIFO 3. Set the EP0 response PID to BUF ("01") Abandon request data analysis result W ait for the next CTRT interrupt ACK SETUP OUT IN ADDR EP CRC5 DATA0 DATA1 : : : : : : : : SE TUP PID O UT PID IN PID USB address (H'00~H'7F) Endpoint (H'0~H'3) 5 bits CRC DATA0 PID DATA1 PID CR CW ND CRC16 ACK NAK STALL : : : : : : : Control read transfer Control write transfer Control no data transfer 16 bits CRC ACK PID NAK PID STALL P ID : Data to device from host : Data to host from device Figure 3.12 Examples of Setup Continuous Operations (2) USB -94 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.5 Enumeration Figure 3.13 shows the overview of enumeration operations. Host side procedure S/W side procedure H/W procedure Powered state (DVSQ ="000") Initialize procedure USBbus connect (PC power O N etc.) Vbus interrupt FullSpeed device notification (Set the T r_O N bits) FullSpeed device recognition USB bus reset D efault state (DVSQ ="001") G ET _D ESCRIPTO R request (ADDR =0) Device state transition interrupt (USB bus reset) USB reset procedure Control transfer stage transition interrupt Descriptor data set Descriptor receive SET _ADDRESS request Address state (DVSQ ="010") G ET _D ESCRIPTO R request (ADDR 0) Device state transition interrupt (SetAddress) Control transfer stage transition interrupt (at disabled autom atic response) SetAddress procedure Control transfer stage transition interrupt Descriptor data set Descriptor receive SET _CO NFIG URAT IO N request Configured state (DVSQ ="011") Device state transition interrupt (SetConfiguration) Control transfer stage transition interrupt (at disabled autom atic response) Configuration receive Figure 3.13 Overview of Bus Enumeration Operations USB -95 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.5.1 FIFO Buffer Management The M66291 is equipped with the registers below in order to execute high-level management of the FIFO buffer set to continuous transmit/receive mode. (1) SIE_FIFO Status Register This register can forcibly toggle the FIFO buffer at SIE side of double buffer, enabling the CPU to access to the SIE side FIFO. Further, the CPU can refer to the received data number in the SIE side FIFO. (2) Transaction Count Register When the continuous transfer mode buffer set in the OUT bulk transfer, the data receive count by MAX packet size is specified, enabling the transaction only for the set count. It is convenient for the DMA transfer. (3) FIFO Status Register This register is used for referring to the FIFO buffer status. 3.5.2 Cautions at FIFO Data Access Make sure of the items as follows when accessing the FIFO Data Register. When 8-bit width is selected in CPU interface: The FIFO data can not be set to 16-bit mode by the register bit (Octl), while *LWR pin becomes valid as the write strobe at 8-bit mode. When 16-bit width is selected in CPU interface: The FIFO data can be set both to 16-bit and 8-bit modes by the register bit (Octl). B-1) 16-bit mode (Octl bit ="0") When accessing data for write, assert *HWR and *LWR pins simultaneously for word access, and *LWR pin for byte access. At byte access, D7 to 0 become valid. B-2) 8-bit mode (Octl bit ="1") When accessing data for write, *LWR pin is valid as the write strobe. Here, D7 to 0 become valid. When accessing data for read, D15 to 8 and D7 to 0 are the same. USB -96 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.5.3 CPU Interface Bus Width Selection The bus width is selected by the *HWR/*BYTE pin level at the rising of the *RST pin. The 8-bit width is selected when *HWR/*BYTE pin is "L" level and 16-bit when it is "H" level. With the 8-bit width selected, fix the *HWR/*BYTE pin to "L". W hen select to 8-bit bus width W hen select to 16-bit bus width "L" HW R/BYTE HW R/BYTE RST 3.5.4 RST Combination of CPU Interface Input Pins CPU *CS *HWR *LWR *RD Interface Valid D15-8 D7-0 Remarks address 8-bit L L L H A6-0 Note 1 Data input Writes the lower byte width L L H L A6-0 Note 1 Data output Reads the lower byte H X X X A6-0 Note 1 Hi-Z 16-bit L L H H A6-1 Data input Hi-Z Writes the upper byte width L H L H A6-1 Hi-Z Data input Writes the lower byte L L L H A6-1 Data input Data input Writes the upper and lower bytes L H H L A6-1 Data output H X X X A6-1 Hi-Z Data output Reads the upper and lower bytes Hi-Z X : Don't care Hi-Z : High impedance Note 1: The D15/A0 become input pins, while the others depend on the ports setting. Note 2: The above figure is not applicable when accessing to the FIFO Data Register. USB -97 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.5.5 Register Data Access (1) Writing when CPU interface 16-bit width is selected When 16-bit width is selected, A6 to 1 becomes valid. Further, *HWR pin becomes valid as the write strobe for D15 to 8 while *LWR pin for D7 to 0 at the time of data writing. Valid adress A6~1 CS HWR LW R D15~8 D7~0 (2) Writing when CPU interface 8-bit width is selected When 8-bit width is selected, A6 to 0 becomes valid. Further, *LWR pin becomes valid as the write strobe at the time of data writing. Here, fix the *HWR/*BYTE pin to "L" level. Valid adress A6~0 CS H W R/ "L" BYT E LW R D7~0 Note: The above figures are not applicable when accessing the FIFO Data Register. USB -98 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 3. M66291 OPERATIONS 3.5.6 Clock 48 MHz clock is needed for the internal operation of the M66291. A built-in PLL enables an external clock of 6, 12, 24, or 48 MHz to be input. Selection is realized by XTAL bit of the USB Operation Enable Register. When an external 48 MHz clock is used, the PLL is not needed, so the PLL operation should be disabled. A built-in oscillation buffer enables the device to be clocked from a crystal unit. The device is set to standby state by the USB Operation Enable Register. Oscillation is halted (clock input halted) by XCKE bit, PLL is halted by PLLC bit, and clock supply to the USB block is halted by SCKE bit. To prevent unstable behavior, clock supply to USB block must be applied as follow: a. Enables clock input by the XCKE, b. Wait until oscillation stabilizes, c. Start PLL by the PLLC bit, d. Wait until PLL oscillation stabilizes (less than 1ms), e. then start clock supply to USB block by the SCKE bit. USB -99 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4. ELECTRICAL CHARACTERISTICS 4.1 Absolute Maximum Ratings Symbol Parameter Ratings Unit CoreVcc USB Core supply voltage -0.3 ~ +4.2 V IOVcc System interface supply voltage -0.3 ~ +6.5 V Vbus Vbus input voltage -0.3 ~ +5.5 V VI(IO) System interface input voltage -0.3 ~ IOVcc+0.3 V VO(IO) System interface output voltage -0.3 ~ IOVcc+0.3 V Pd Power dissipation 400 mW Ts t g Storage temperature -55 ~ +150 C 4.2 Recommended Operating Conditions Symbol CoreVcc IOVcc Parameter Ratings USB Core supply voltage Unit Min. Typ. Max. 3.0 3.3 3.6 V System interface supply 5V 4.5 5.0 5.5 V voltage 3V 2.7 3.3 3.6 V GND Supply voltage VI(IO) System interface input voltage 0 IOVcc V VI(Vbus) Input voltage (only Vbus input) 0 5.25 V VO(IO) System interface output voltage 0 IOVcc V To p r Operating temperature 0 +70 C Normal input 500 ns Schmidt trigger input 5 ms tr, tf Input rise, fall time 0 USB -100 +25 V Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.3 Electrical Characteristics (IOVcc=2.7~3.6V,CoreVcc=3.0~3.6V) Symbol Parameter Condition Limits Min. VIH "H" input voltage VIL "L" input voltage VIH "H" input voltage VIL "L" input voltage VT+ Threshold voltage in positive direction VT- Threshold voltage in negative direction VTH Hysteresis voltage VO H "H" output voltage VO L "L" output voltage VO H "H" output voltage VO L "L" output voltage VO H "H" output voltage Xin Note1 Note 2 Xout CoreVcc = 3.6V 2.52 3.6 V CoreVcc = 3.0V 0 0.9 V IOVcc = 3.6V 0.7IOVcc 3.6 V IOVcc = 2.7V 0 0.3IOVcc V IOVcc = 3.3V 1.4 2.4 V 0.5 1.65 V CoreVcc = 3.0V IOH = -50uA Note 3 IOVcc = 2.7V IOH = -2mA V 0.4 IOVcc-0.4 "L" output voltage VT+ VT- Threshold voltage in negative direction II H "H" input current II L "L" input current IOZH "H" output current in off status D IOZL "L" output current in off status 15-0 Rd v Pull down resistance Note 5 Rd t Pull down resistance Note 6 IOVcc = 2.7V IOH = -4mA 0.4 IOVcc-0.4 0.4 V 1.4 2.4 V 0.5 1.65 V VI = IOVcc 10 uA VI = GND -10 uA VO = IOVcc 10 uA VO = GND -10 uA CoreVcc=3.3V IOVcc = 3.6V Note 7 IOVcc = 3.6V V V IOL = 4mA Note 5 V V IOL = 2mA Note 4 V 2.6 IOL = 50uA Threshold voltage in positive direction Average supply current in operation mode Max. 0.8 VO L Icc(A) Typ. Unit f(Xin)=48MHz,IOVcc=3.6V, CoreVcc=3.6V,USB transmit state 500 k 50 k 15 30 mA Icc(S) Supply current in static mode Note 7 Oscillator disable, PLL disable, USB transceiver enable, TrON=H/L output *CS,*HWR/*BYTE,*LWR, *Dack0,*Dack1=IOVcc, D15-0=0 ~ IOVcc, Other input VI=IOVcc or GND IOVcc = 3.6V,CoreVcc=3.6V Vbus=5.0V, suspend state 30 200 uA Icc(S) Supply current in static mode Oscillator disable, PLL disable, USB transceiver enable, TrON=Hi-Z *CS,*HWR/*BYTE,*LWR, *Dack0,*Dack1=IOVcc, D15-0=0 ~ IOVcc, Other input VI=IOVcc or GND IOVcc = 3.6V,CoreVcc=3.6V Vbus=GND, H/W reset state 10 100 uA Note 7 USB -101 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS Note 1: A6-1, TEST input pins and D15-0 input/output pins Note 2: *CS, *RD, *LWR, *HWR/*BYTE, *Dack0, *Dack1, *TC1, *RST input pins Note 3: *INT0, *Dreq0, *Dreq1 output pins Note 4: D15-0 input/output pins, *INT1/SOF output pins Note 5: Vbus input pin Note 6: TEST input pin Note 7: The supply current is the total of IOVcc, CoreVcc. USB -102 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.4 Electrical Characteristics (IOVcc=4.5~5.5V,CoreVcc=3.0~3.6V) Symbol Parameter Condition Limits Min. VIH "H" input voltage VIL "L" input voltage VIH "H" input voltage VIL "L" input voltage VT+ Threshold voltage in positive direction VT- Threshold voltage in negative direction VTH Hysteresis voltage VO H "H" output voltage VO L "L" output voltage VO H "H" output voltage VO L "L" output voltage VO H "H" output voltage VO L "L" output voltage VT+ Threshold voltage in positive direction VT- Threshold voltage in negative direction II H "H" input current Xin Note 1 Note 2 Typ. Unit Max. CoreVcc = 3.6V 2.52 3.6 V CoreVcc = 3.0V 0 0.9 V IOVcc = 5.5V 0.7IOVcc 5.5 V IOVcc = 4.5V 0 0.3IOVcc V IOVcc = 5.0V 2.3 3.7 V 1.25 2.3 V 0.8 Xout CoreVcc = 3.0V IOH = -50uA 2.6 V IOL = 50uA Note 3 IOVcc = 4.5V IOH = -2mA 0.4 4.1 IOVcc = 4.5V IOH = -4mA 0.4 4.1 II L "L" input current IOZH "H" output current in off status D IOZL "L" output current in off status 15-0 Rd v Pull down resistance Note 5 Rd t Pull down resistance Note 6 Icc(A) Average supply current in operation mode Note 7 Icc(S) Supply current in static mode Note 7 Icc(S) Supply current in static mode Note 7 0.4 V 1.4 2.4 V 0.5 1.65 V Vi= IOVcc 10 uA Vi = GND -10 uA Vo = IOVcc 10 uA Vo = GND -10 uA CoreVcc=3.3V IOVcc = 5.5V IOVcc = 5.5V V V IOL = 4mA Note 5 V V IOL = 2mA Note 4 V f(Xin)=48MHz,IOVcc=5.5V, CoreVcc=3.6V,USB transmit state 500 k 50 k 15 30 mA Oscillator disable, PLL disable, USB transceiver enable, TrON=H/L output *CS,*HWR/*BYTE,*LWR, *Dack0,*Dack1=IOVcc, D15-0=0 ~ IOVcc, Other input VI=IOVcc or GND IOVcc = 5.5V,CoreVcc=3.6V Vbus=5.0V, suspend state 30 200 uA Oscillator disable, PLL disable, USB transceiver enable, TrON=Hi-Z *CS,*HWR/*BYTE, *LWR, *Dack0,*Dack1=IOVcc, D15-0=0 ~ IOVcc, Other input VI=IOVcc or GND IOVcc = 5.5V,CoreVcc=3.6V Vbus=GND,H/W reset state 10 100 uA USB -103 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS Note 1: A6-1, TEST input pins and D15-0 input/output pins Note 2: *CS, *RD, *LWR, *HWR/*BYTE, *Dack0, *Dack1, *TC1, *RST input pins Note 3: *INT0, *Dreq0, *Dreq1 output pins Note 4: D15-0 input/output pins, *INT1/SOF output pins Note 5: Vbus input pin Note 6: TEST input pin Note 7: The supply current is the total of IOVcc, CoreVcc. USB -104 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.5 Electrical Characteristics (D+/D-) 4.5.1 DC Characteristics Symbol Parameter Test condition Limits Min. Typ. Unit Max. VDI Differential input sensitivity VCM Differential common mode range 0.8 2.5 V VSE Single ended receiver threshold 0.8 2.0 V VOL "L" output voltage CoreVcc = RL of 1.5K to 3.6V 0.3 V VOH "H" output voltage 3.0V RL of 1.5K to GND 2.8 3.6 V IOZL "L" output current in off status CoreVcc = VO =0V -10 10 uA IOZH "H" output current in off status 3.6V VO =3.6V -10 10 uA Ro(Pch) Output impedance CoreVcc = VO =0V 4 7 15 Ro(Nch) Output impedance 3.3V VO =3.3V 4 7 15 4.5.2 0.2 (D+)-(D-) V AC Characteristics Symbol Parameter Test condition Limits Min. tr Rise transition time tf Fall transition time TRFM Rise/fall time matching VCRS Output signal crossover voltage 10% to 90% of the data signal : amplitude 90% to 10% of the data signal : amplitude Typ. Unit Max. CL=50pF 4 20 ns CL=50pF 4 20 ns tr/tf 90 110 % CL=50pF 1.3 2.0 V USB -105 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.6 Switching Characteristics (IOVcc=2.7~3.6V or 4.5~5.5V) Symbol Parameter Test conditions Limits Min. ta(A) Address access time tv(A) Data valid time after address ta(CTRL) Control access time tv(CTRL) Data valid time after control 0 ten(CTRL) Control output enable time 0 tdis(CTRL) Output disable time after control 0 tdis(CTRL- Typ. Unit No. Max. 40 Refer ns 1 ns 2 ns 3 ns 4 20 ns 5 20 ns 6 Dreq disable time after control 50 ns 7 Dreq disable time after Dack 50 ns 8 ta(Dack) Dack access time 30 ns 9 ten(Dack) Output enable time after Dack 20 ns 10 tv(Dack) Data valid time after Dack 0 ns 11 tdis(Dack) Output disable time after Dack 0 20 ns 12 tdis(CTRLH Dreq disable time after control 50 ns 13 INT negate delay time 250 ns 14 0 30 Dreq ) tdis(Dack Dreq ) CL=50pF 0 -Dreq ) td(CTRLINT) twh(INT) INT "H" pulse width 650 ns 15 twh(Dreq ) Dreq "H" pulse width 50 ns 16 ten(Dack - Dreq enable time after Dack 30 ns 17 Dreq enable time after control 50 ns 18 Dreq ) ten(CTRLDreq ) USB -106 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.7 Timing Requirements (IOVcc=2.7~3.6V or 4.5~5.5V) Symbol Parameter Test conditions Limits Min. Typ. Unit Refer No. Max. tsuw(A) Address write setup time 30 ns 30 tsur(A) Address read setup time 0 ns 31 thw(A) Address write hold time 0 ns 32 thr(A) Address read hold time 30 ns 33 tw(CTRL) Control pulse width (Write) 30 ns 34 trec(CTRL) Control recovery time (FIFO) 30 ns 35 trecr(CTRL) Control recovery time (REG) 15 ns 36 tw(Dack) Dack pulse width 30 ns 37 tsu(D) Data setup time 20 ns 38 th(D) Data hold time 0 ns 39 tw(cycle) FIFO access cycle time 100 ns 40 tsud(A) DMA address setup time 15 ns 41 thd(A) DMA address hold time 0 ns 42 tw(RST) Reset pulse width 100 ns 43 tst(RST) Control start time after RESET 500 ns 44 tsu(BYTE) Byte mode setup time 250 ns 45 th(BYTE) Byte mode hold time 250 ns 46 twr(CTRL) Control pulse width (Read) 50 ns 47 td1(Dack-TC) TC delay time 1 0 ns 48 td2(Dack-TC) TC delay time 2 ns 49 30 USB -107 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.8 Measurement circuit 4.8.1 Pins except for USB buffer block Vcc Input Vcc Item R L =1k SW 1 D15-0 Elem ents to be m easured P.G. SW 2 CL SW 1 SW 2 tdis(CT RL(LZ)) close open tdis(CT RL(HZ)) open close ta(CT RL(ZL)) close open ta(CT RL(ZH)) open close R L =1k (1) Input pulse level : 0 ~ 3.3V, 0 ~ 5.0V Input pulse rise/fall time : tr,tf=3ns Input timing standard voltage : IO Vcc/2 D15-0 other output O utput timing judge voltage : IO Vcc/2 (T he tdis (LZ) is judged by 10% of the output amplitude and the tdis (H Z) by 90% of the output amplitude.) 50 CL GND (2) The electrostatic capacity CL includes the stray capacitance of the wire connection and the input capacitance of the probe. 4.8.2 USB buffer block Vcc Vcc R L = 1.5K D+ E lem ents to be m eas ured R L = 27 R L =15k CL DR L = 27 R L =15k (1) T he tr and tf are judged by the trans ition tim e of the 10% am plitude p oint an d 90% am plitude point res pec tively. (2 ) T he elec tros tatic c apac ity C L inc ludes the s tray c apac itanc e of the wire c onn ection and the inpu t c apac itanc e of the probe. CL GND USB -108 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.9 Timing Diagram 4.9.1 CPU interface timing (1-1) Write timing (*RD="H") 32 tsuw(A) 30 A6-1 (A6-0) thw(A) Address is established CS 40 34 LW R (HW R) tw(cycle) Note 1 trec(CTRL), tw(CTRL) 35 trecr(CTRL)Note 1 36 Note 2 tsu(D) D15-0 (D7-0) Note 7 38 th(D) 39 Data is established (1-2) Read timing (*LWR="H", *HWR="H") ta(A ) 31 1 thr(A ) 33 tsur(A ) A 6-1 (A 6-0) A ddress is established CS 40 3 tw (cycle) N ote 1 35 ta(C T R L) tw r(C T R L) 47 trec(C T R L), trecr(C T R L) RD tv(A ) 2 N ote 3 tv(C T R L) ten(C T R L) D 15-0 (D 7-0) 36 tdis(C T R L) 5 N ote 7 4 6 D ata is e stablished USB -109 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS Note 1: tw(cycle), trec(CTRL) are necessary for making access to FIFO. Further trecr(CTRL) is valid at the time of register access. Note 2: Writing through the combination of *CS, *HWR and *LWR is carried out during the overlap of active ("L"). The specification from the rising edge is valid from the earliest inactive signal. The specification of pulse width becomes valid during the overlap of active ("L"). Note 3: Reading through the combination of *CS, *RD is carried out during the overlap of active ("L"). The specification from the falling edge is valid from the latest active signal. The specification from the rising edge is valid from the earliest inactive signal. The specification of pulse width becomes valid during the overlap of active ("L"). Note 7: In 8-bit Mode, D7~0 and A6~0 become valid. USB -110 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.9.2 DMA Transfer Timing 1 When set to Cycle Steal Transfer (DMA Transfer Mode Register: BUST = 0) (2-1) Write timing 1 (DMAEN=1, DFORM=00) twh(Dreq) 16 tdis(CTRL-Dreq) Dreq 7 ten(CTRL-Dreq) Note 4 18 Dack 17 34 ten(Dack-Dreq) tw(CTRL) LW R (HW R) Note 5 tsu(D) D15-0 (D7-0) 38 th(D) 39 Data is established Note 7 (2-2) Read timing 1 (DMAEN=1, DFORM=00) tw h (D req ) 16 tdis(C T R L -D req ) 7 D req ten(C T R L -D req ) N o te 4 18 D a ck 17 3 ta(C T R L ) tw r(C T R L) 47 ten (D ac k-D req ) RD N ote 6 tv(C TR L ) ten (C T R L) D 1 5-0 (D 7 -0) td is(C T R L) 5 4 6 D ata is established N o te 7 USB -111 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS Note 4: *Dack="L" level is the condition for inactive *Dreq, and the latter signal of twh(Dreq) or ten(CTRL-Dreq) becomes valid as the specification of active *Dreq at the time of next DMA transfer. Note 5: Writing through the combination of *Dack, *HWR and *LWR is carried out during the overlap of active ("L"). The specification of the rising edge is valid from the earliest inactive signal. The specification of pulse width is valid during the overlap of active ("L"). Note 6: Reading through the combination of *Dack and *RD is carried out during the overlap of active ("L"). The specification from the falling edge is valid from the latest active signal. The specification from the rising edge is valid from the earliest inactive signal. The specification of pulse width is valid during the overlap of active ("L"). Note 7: In 8-Bit Mode, D7~0 becomes valid. USB -112 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS (2-3) Write timing 2 (DMAEN=1, DFORM=01) twh(Dreq) 16 tdis(Dack-Dreq) Dreq 8 Note 4 tw(Dack) ten(Dack-Dreq) 17 37 Dack tsu(D) D15-0 (D7-0) 38 th(D) 39 Data is established Note 7 (2-4) Read timing 2 (DMAEN=1, DFORM=01) twh(Dreq) 16 Dreq Note 4 tdis(Dack-Dreq) 8 Dack ten(CTRL-Dreq) 18 tw(Dack) 37 9 10 D15-0 (D7-0) tdis(Dack) ta(Dack) 12 tv(Dack) ten(Dack) 11 Data is established Note 7 Note 4: *Dack="L" level is the condition for inactive *Dreq, and the latter signal of twh(Dreq) or ten(Dack-Dreq) becomes valid as the specification of active *Dreq at the time of next DMA transfer. Note 7: In 8-Bit Mode, D7~0 becomes valid. USB -113 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS (2-5) Write timing 3 (DMAEN=1, DFORM=10) (*RD="H") 16 13 twh(Dreq) tdis(CTRLH-Dreq) Dreq ten(CTRL-Dreq) tsud(A) A6-1 (A6-0) thd(A) 41 18 42 Address is established CS Note 2 34 LW R (HW R) tw(CTRL) Note 2 tsu(D) D15-0 (D7-0) 38 th(D) 39 Data is established Note 7 Note 2: Writing through the combination of *CS, *HWR and *LWR is carried out during the overlap of active ("L"). The specification of the rising edge is valid from the earliest inactive signal. The specification of pulse width is valid during the overlap of active ("L"). Note 7: In 8-Bit Mode, D7~0 and A6~0 become valid. USB -114 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS (2-6) Read timing 3 (DMAEN=1, DFORM=10) (*LWR="H", *HWR="H") tdis(CTRL-Dreq) 7 thw(Dreq) Dreq 16 ten(CTRL-Dreq) ta(A) 31 1 thr(A) 33 tsur(A) A6-1 (A6-0) 18 Address is established CS Note 3 3 ta(CTRL) twr(CTRL) 47 RD tv(A) 2 Note 3 tv(CTRL) ten(CTRL) tdis(CTRL) 5 D15-0 (D7-0) 4 6 Data is established Note 7 Note 3: Reading through the combination of *CS and *RD is carried out during the overlap of active ("L"). The specification of the falling edge is valid from the latest active signal. The specification of the rising edge is valid from the earliest inactive signal. The specification of pulse width becomes valid during the overlap of active ("L"). Note 7: In 8-Bit Mode, D7~0 and A6~0 become valid. USB -115 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.9.3 DMA Transfer Timing 2 When set to Burst Transfer (DMA Transfer Mode Register : BUST=1) (3-1) Write timing (DMAEN=1, DFORM=00) 7 tdis(CTRL-Dreq) Dreq Dack RD 34 tw(CTRL) trec(CTRL) 35 LW R (HW R) 40 Note 5 tw(cycle) D15-0 (D7-0) Note 7 38 39 tsu(D) th(D) (3-2) Read timing (DMAEN=1, DFORM=00) 7 tdis(CTRL-Dreq) Dreq Dack 47 RD twr(CTRL) trec(CTRL) Note 6 tw(cycle) LW R (HW R) 40 tv(CTRL) 3 D15-0 (D7-0) 35 ta(CTRL) 4 Note 7 Note 5: Writing through the combination of *Dack, *HWR and *LWR is carried out during the overlap of active ("L"): The specification of the rising edge is valid from the earliest inactive signal. The specification of pulse width becomes valid during the overlap of active ("L"). Note 6: Reading through the combination of *Dack and *RD is carried out during the overlap of active ("L"). The specification from the falling edge is valid from the latest active signal. The specification from the rising edge is valid from the earliest inactive signal. The specification of pulse width becomes valid during the overlap of active ("L"). Note 7: In 8-Bit Mode, D7~0 becomes valid. USB -116 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS (3-3) Write timing (DMAEN=1, DFORM=10) 30 tsuw(A) A6-1 (A6-0) thw(A) Address is established 32 Address is established Address is established CS 7 Dreq tdis(CTRL-Dreq) RD 34 LW R (HW R) tw(CTRL) trec(CTRL) 35 40 Note 5 tw(cycle) D15-0 (D7-0) Note 7 38 39 tsu(D) th(D) (3-4) Read timing (DMAEN=1, DFORM=10) 1 31 ta(A) tsur(A) A6-1 (A6-0) thr(A) 33 Address is established Address is established Address is established CS 7 Dreq 47 RD twr(CTRL) trec(CTRL) Note 6 tw(cycle) tdis(CTRL-Dreq) 35 40 LW R (HW R) 3 ta(CTRL) tv(A) 2 4 tv(CTRL) D15-0 (D7-0) Note 7 USB -117 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS Note 5: Writing through the combination of *Dack, *HWR and *LWR is carried out during the overlap of active ("L). The specification from the rising edge is valid from the earliest inactive signal. The specification of pulse width becomes valid during the overlap of active ("L"). Note 6: Reading through the combination of *Dack and *RD is carried out during the overlap of active ("L"). The specification from the falling edge is valid from the latest active signal. The specification from the rising edge is valid from the earliest inactive signal. The specification of pulse width becomes valid during the overlap of active ("L"). Note 7: In 8-Bit Mode, D7~0 becomes valid. USB -118 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS (3-5) TC timing 48 td1(Dack-TC) 49 Dack Dack TC TC td2(Dack-TC) 4.10 Interrupt Timing 15 twh(INT) INT 14 td(CTRL-INT) CS, LW R (HW R) Note 2 4.11 Reset Timing 43 tw(RST) RST 44 tst(RST) CS, LW R (HW R) Note 2 Note 2: Writing through the combination of *CS, *HWR and *LWR is carried out during the overlap of active ("L"). The specification from the rising edge is valid from the earliest inactive signal. USB -119 Ver.1.0 Apr.9 2001 MITSUBISHI <DIGITAL ASSP> M66291GP 4. ELECTRICAL CHARACTERISTICS 4.12 Bus Interface Select Timing RST 46 45 HW R/BYTE tsu(BYTE) "L"or"H" th(BYTE) fixed USB -120 Ver.1.0 Apr.9 2001 KEEP SAFETY FIRST IN YOUR CIRCUIT DESIGNS ! Mitsubishi Electric Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage. Remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of non-flammable material or (iii) prevention against any malfunction or mishap. NOTES REGARDING THESE MATERIALS * These materials are intended as a reference to assist our customers in the selection of the Mitsubishi semiconductor product best suited to the customer's application; they do not convey any license under any intellectual property rights, or any other rights, belonging to Mitsubishi Electric Corporation or a third party. * Mitsubishi Electric Corporation assumes no responsibility for any damage, or infringement of any third-party's rights, originating in the use of any product data, diagrams, charts or circuit application examples contained in these materials. * All information contained in these materials, including product data, diagrams and charts, represent information on products at the time of publication of these materials, and are subject to change by Mitsubishi Electric Corporation without notice due to product improvements or other reasons. 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