USBFC (USB Function Controller)

Transcription

1 USBFC () EIFUFAL501 User s Manual Doc #: E01 Revision: 2.0 Dae: 03/24/98

2 (USBFC) 1. Highlighs Feaures Overview USBFC Block Diagram USBFC Typical Sysem Block Diagram Signal Descripion Symbol Diagram for USBFC Signal Descripion Funcional Descripion USB Inerface Local Bus CPU Conrolled USB o Local Bus Transfers CPU Conrolled Local Bus o USB Transfers DMA Conrolled USB o Local Bus Transfers DMA Conrolled Local Bus o USB Transfers Terminaing DMA Transfers USB Endpoin 1 Receive Mailboxes USB Endpoin 2 Transmi Mailboxes Suspend Mode The Suspend Sequence Device-Remoe Wake-Up Hos-Iniiaed Wake-Up USBFC Power Configuraion Local Regisers Regiser Descripion Regiser Summary (Address 00h; DCTL) DMA Conrol Regiser (Address 01h; IRQENB1) Inerrup Enable Regiser (Address 02h; IRQSTAT1) Inerrup Saus Regiser (Address 03h; IRQENB2) Inerrup Enable Regiser (Address 04h; IRQSTAT2) Inerrup Saus Regiser (Address 08h; EP1IDX) Endpoin 1 Index Regiser (Address 09h; EP1DATA) Endpoin 1 Receive Mailbox Daa (Address 0Ch; EP2IDX) Endpoin 2 Index Regiser (Address 0Dh; EP2DATA) Endpoin 2 Transmi Mailbox Daa (Address 0Eh; EP2POLL) Endpoin 2 Inerrup Polling Inerval Regiser (Address 10h; EP3DATA) Endpoin 3 Receive FIFO Daa Regiser (Address 11h; EP3COUNT) Endpoin 3 Receive FIFO Coun Regiser (Address 12h; EP3STAT) Endpoin 3 Receive FIFO Saus Regiser (Address 13h; EP3PKSZ) Endpoin 3 Maximum Packe Size Regiser (Address 14h; EP4DATA) Endpoin 4 Transmi FIFO Daa Regiser (Address 15h; EP4COUNT) Endpoin 4 Transmi FIFO Coun Regiser (Address 16h; EP4STAT) Endpoin 4 Transmi FIFO Saus Regiser (Address 17h; EP4PKSZ) Endpoin 4 Maximum Packe Size Regiser (Address 18h; REVISION) Revision Regiser (Address 19h; USBSTAT) USB Saus Regiser (Address 1Ah; FRAMEMSB) Frame Couner MSB Regiser (Address 1Bh; FRAMELSB) Frame Couner LSB Regiser (Address 1Ch; EXTIDX) Exended Regiser Index (Address 1Dh; EXTDATA) Exended Regiser Daa EPSON 2

3 (Address 1Dh, Index 00h; VIDMSB) Vendor ID MSB (Address 1Dh, Index 01h; VIDLSB) Vendor ID LSB (Address 1Dh, Index 02h; PIDMSB) Produc ID MSB (Address 1Dh, Index 03h; PIDLSB) Produc ID LSB (Address 1Dh, Index 04h; RELMSB) Release Number MSB (Address 1Dh, Index 05h; RELLSB) Release Number LSB (Address 1Dh, Index 06h; RCVAFTH) Receive FIFO Almos Full Threshold (Address 1Dh, Index 07h; XMTAETH) Transmi FIFO Almos Empy Threshold (Address 1Dh, Index 08h; USBCTL) USB Conrol (Address 1Dh, Index 09h; MAXPWR) Maximum Power Consumpion (Address 1Dh, Index 0Ah; PKTCTL) Packe Conrol (Address 1Dh, Index 0Bh; LOCALCTL) Local-Side Conrol (Address 1Dh, Index 0Ch; FIFOCTL) FIFO Conrol Sandard Device Requess Conrol IN Transacions Ge Device Saus Ge Inerface Saus Ge Endpoin 0,1,2,3,4 Saus Ge Device Descripor (18 Byes) Ge Configuraion Descripor (46 byes) Ge Sring Descripor Ge Sring Descripor Ge Sring Descripor Ge Configuraion Ge Inerface Conrol OUT Transacions Se Address Se Configuraion Se Inerface Device Clear Feaure Device Se Feaure Endpoin 0,1,2,3,4 Clear Feaure Endpoin 0,1,2,3,4 Se Feaure Endpoin 1 OUT Transacions (Receive Mailboxes) Endpoin 2 IN Transacions (Transmi Mailboxes) Endpoin 3 OUT Transacions (Receive FIFO) Endpoin 4 IN Transacions (Transmi FIFO) Vendor Device Requess Device Clear Feaure Device Se Feaure Timing Local Bus Wrie o Regiser Local Bus Read from Regiser DMA Wrie o FIFO DMA Read from FIFO Tes Circui EPSON 3

4 1. Highlighs 1.1 Feaures USB Specificaion Version 1.0 Complian Bridges beween a Processor-Independen local bus and a USB bus USB device bandwidh of up o 12Mb/sec USB Bulk, Isochronous, Inerrup, and Conrol ransfers. Independen 64 bye ransmi and receive FIFOs o maximize hroughpu. Suppors local CPU or DMA daa ransfers. 3.3V operaing volage 1.2 Overview The (USBFC) allows bulk or isochronous daa ransfers beween a generic local bus and a Universal Serial Bus (USB). The USBFC suppors he connecion beween a hos compuer and an inelligen peripheral such as a digial camera or scanner. The hree main componens of he USBFC are he USB Bus Inerface, he dual 64 bye FIFOs, and a Local Bus Inerface. The USB Inerface is responsible for he following funcions: Hos o device Communicaion Bulk or isochronous endpoins o access FIFOs Inerrup endpoin o access Local o USB Mailboxes Bulk endpoin o access USB o Local Mailboxes The Local Bus Inerface is responsible for he following funcions: FIFO Conrol Local CPU inerface Local DMA conroller inerface Inerrups EPSON 4

5 1.3 USBFC Block Diagram D[7:0] A[4:0] Configuraion, Conrol, and Saus Endpoin_0 CS_ IOR_ 8-Bye Mailbox Bulk Endpoin_1 IOW_ DRQ Local Bus Conroller 8-Bye Mailbox Inerrup Endpoin_2 USB Serial Inerface Engine and Conroller D+ USB PORT D- DACK_ EOT_ 64 Bye Rcv FIFO Bulk & Isochronous Endpoin_3 IRQ RESET_ 64 Bye Xm FIFO Bulk & Isochronous Endpoin_4 1.4 USBFC Typical Sysem Block Diagram Scanner/Camera Conroller Shared Memory Microprocessor Daa Bus DMA Conroller (Opional) USB Funcion Conroller USB PORT EPSON 5

6 2. Signal Descripion 2.1 Symbol Diagram for USBFC CLK48_EARLY ROOT_DATAIN_P ROOT_DATAIN_M SIE_XRXD LDIN7 LDIN6 LDIN5 ROOT_DATAOUT_P ROOT_DATAOUT_M ROOT_DATA_OE_ INT_ DRQ LDIN4 LDIN3 LDIN2 LDIN1 LDIN0 LA4 LA3 LA2 USBFC LDOUT7 LDOUT6 LDOUT5 LDOUT4 LDOUT3 LDOUT2 LDOUT1 LDOUT0 LA1 LA0 RESET_ CS_ IOR_ IOW_ LDOUT_OE_ DEVCFG_ SUSP_ LRESET_ OSC_RUN LCLK_OUT DACK_ EOT_ ISO_ WAKEUP_ BUSPWR_ PWRGOOD_ TEST EPSON 6

7 2.2 Signal Descripion NOTE: Inpu signal mus be driven exernally when he USBFC is in he suspended sae. The signal which has underscore (_) a he end of is name is acive low. Signal Name Type Descripion CLK48_EARLY Inpu 48 MHz Oscillaor inpu. RESET_ Inpu Rese. Exernal rese. Connec o local or power-on rese. To rese when oscillaor is sopped (iniial power-up or in suspend sae), asser for a leas one ms. When oscillaor is running, asser for a leas five 48-MHz clock periods. ROOT_DATAIN_P, ROOT_DATAIN_M Inpu USB Daa Inpu. Two differenial inpu signals (DP & DM) of he USB por. SIE_XRXD Inpu USB Daa Differenial Receiver. Amplified inpu signal exraced from he wo incoming differenial inpu signals of he USB daa por. DP > DM : 1, DP < DM : 0 ROOT_DATAOUT_P, ROOT_DATAOUT_M Oupu USB Daa Oupu. Two differenial oupu signals (DP & DM) of he USB por. ROOT_DATA_OE_ Oupu USB Por Oupu Enable. This acive low oupu is rue when USBFC is driving he USB por daa oupu lines (ROOT_DATAOUT_P & ROOT_DATAOUT_M). LDIN[7:0] Inpu Daa Inpu. LDIN7 is he mos-significan bi. LDOUT[7:0] Oupu Daa Oupu. LDOUT7 is he mos-significan bi. LDOUT_OE_ Oupu Daa Oupu Enable. This acive low oupu is rue when he USBFC is driving he Daa Oupu Bus (LDOUT). LA[4:0] Inpu Address Bus. The local address bus is used by devices on he local bus o selec regisers wihin he USBFC. CS_ Inpu Chip Selec. The chip selec is used by devices on he local bus o enable access o regisers wihin he USBFC. This signal is ignored if DACK_ is assered. IOR_ Inpu I/O Read. The I/O read srobe is assered along wih CS_ and LA[4:0] when a device on he local bus reads from an inernal regiser or he FIFO. I also allows he FIFO o be read during DMA ransfers when DACK_ is assered. IOW_ Inpu I/O Wrie. The I/O wrie srobe is assered along wih CS_ and LA[4:0] when a device on he local bus wries o an inernal regiser or he FIFO. I also allows he FIFO o be wrien during DMA ransfers when DACK_ is assered. DRQ Oupu DMA Reques. This signal indicaes o an exernal DMA conroller ha a bye should be ransferred o/from he FIFO. During a ransfer, DRQ remains assered unil he DACK_ inpu goes acive. DACK_ Inpu DMA Acknowledge. This signal from he exernal DMA conroller is used o ransfer daa o/from he FIFO in response o EPSON 7

8 DRQ. IOR_ and IOW_ deermine he direcion of he DMA ransfer. EOT_ Inpu DMA End of Transfer. This signal from he exernal DMA conroller is used o erminae a DMA ransfer. If i is assered during a DMA cycle, he curren bye will be ransferred, bu no addiional byes will be requesed. EOT_ can be programmed o cause a USB inerrup. INT_ Oupu Inerrup Reques Oupu. The inerrup reques oupu is used o inerrup a processor on he local bus. There are several sources of his inerrup which are described in he Regiser Descripion Secion. DEVCFG_ Oupu Device Configured. This acive low oupu is rue when he USBFC has been configured by he USB hos. SUSP_ Oupu Device Suspended. This acive low oupu is rue when he USBFC has been suspended by he USB hos. OSC_RUN Oupu Oscillaor Run. Clock inpu o CLK48_EARLY shoud be enabled depend on OSC_RUN. LCLK_OUT Oupu Local Clock. This is a buffered oupu from he inernal 48 MHz oscillaor. This signal is no driven while he device is suspended. LRESET_ Oupu Local Rese. This acive low oupu is assered when eiher he RESET_ pin is assered, or a USB por rese is deeced. ISO_ Inpu Isochronous Mode Selec. This acive low inpu selecs isochronous mode for USB ransfers o and from he FIFOs. WAKEUP_ Inpu Wakeup. This acive low inpu causes he USBFC o perform a USB remoe wakeup. BUSPWR_ Inpu Bus Powered. This acive low inpu indicaes ha he logic exernal o he USBFC is powered by he USB bus. If his inpu is high, hen he exernal logic is self-powered. PWRGOOD_ Inpu Power Good. This acive low inpu indicaes ha an exernal power supply used for self-powered mode is operaional. TEST Inpu Tes. For normal operaion, connec his pin o ground. EPSON 8

9 3. Funcional Descripion 3.1 USB Inerface The USBFC is a USB funcion device, and as a resul is always a slave o he USB hos. All USB daa ransfers o and from he USBFC USB por are iniiaed by he USB hos. There are five USB endpoins associaed wih he USBFC: Endpoin 0. This conrol endpoin is used o iniialize he device, and provides access o USB configuraion, conrol and saus regisers. Endpoin 1. This endpoin suppors bulk ransfers from he USB hos o he USBFC receive mailboxes. Endpoin 2. This endpoin suppors inerrup ransfers from he USBFC ransmi mailboxes o he USB hos. Endpoin 3. This endpoin suppors bulk or isochronous daa ransfers from he USB hos o he USBFC Receive FIFO. Endpoin 4. This endpoin suppors bulk or isochronous daa ransfers from he USBFC Transmi FIFO o he USB hos. 3.2 Local Bus Bulk or isochronous daa passes beween he local bus and he USB bus hrough a pair of 64 bye FIFOs. A CPU on he local bus can provide daa o or accep daa from he USB bus via he FIFOs in he USBFC. A pair of 8-bye mailbox regisers provide a means for he local and hos CPUs o exchange messages. The receive mailbox is implemened as a Bulk Daa endpoin, and he ransmi mailbox as an Inerrup endpoin CPU Conrolled USB o Local Bus Transfers For hos o device ransfers, he local and hos CPUs firs arrange o ransfer a block of daa from hos memory o local shared memory. The USB hos performs a bulk or isochronous daa ransfer over he USB bus o he receive FIFO in he USBFC. If he FIFO fills up during a bulk ransfer, he USBFC will reurn a USB NAK acknowledge o he hos, signaling ha he daa could no be acceped. Packe daa which is in he FIFO or has already been read by he CPU should be discarded. If he local CPU has salled his endpoin, he USBFC will no sore any daa ino he FIFO, and will respond wih a STALL acknowledge. The local CPU can eiher sar polling for valid FIFO daa immediaely afer seing up he ransfer wih he USB hos, or can wai for a packe complee inerrup. As he FIFO is filling up from he USB side, he local CPU can poll he FIFO saus regiser o deermine when a bye is available. Oherwise i can wai unil he packe complee inerrup and read he enire packe a once. Once an end of packe occurs, an inerrup can be generaed o he local CPU. The local CPU can read a saus por o deec wheher he packe was acknowledged wih an ACK, NAK, or STALL. If none of hese acknowledge bis are se, hen a imeou has occurred. For NAK or imeou condiions a he compleion of bulk ransfers, he USB hos will send anoher OUT oken, and he USBFC should receive he same packe again CPU Conrolled Local Bus o USB Transfers For device o hos ransfers, he local CPU firs wries he daa block from local memory ino he ransmi FIFO. While wriing daa ino he USBFC, he local CPU mus keep rack of wheher here is space available in he FIFO by monioring he Transmi FIFO Coun regiser. EPSON 9

10 Afer he block has been loaded ino he ransmi FIFO, he local and hos CPUs arrange o ransfer he block of daa from he ransmi FIFO o hos memory. The USB hos sends an IN oken o he USBFC and sars a USB bulk or isochronous read from he ransmi FIFO. The CPU wries and USB read operaions could occur concurrenly if he local CPU can provide daa a a fas enough rae o keep up wih he USB bus. When he ransmi FIFO becomes empy, he USBFC will erminae he packe wih an EOP (end of packe), signaling ha here is no more daa available. Once an end of packe occurs, an inerrup can be generaed o he local CPU. The local CPU can read a saus por o deec wheher he packe was acknowledged wih an ACK from he hos, or wheher he USBFC responded o he IN oken wih a NAK or STALL. If none of hese acknowledge bis are se, hen a imeou has occurred. For NAK or imeou condiions a he compleion of bulk ransfers, he USB hos will send anoher IN oken, and he USBFC should re-ransmi he same packe DMA Conrolled USB o Local Bus Transfers A Direc Memory Access (DMA) conroller may be used on he local bus o ransfer daa o and from he USBFC. For hos o device ransfers, he local and hos CPUs firs arrange o ransfer a block of daa from hos memory o local shared memory. The local CPU hen programs he DMA conroller for fly-by demand mode ransfers. In his mode, ransfers occur only when he USBFC requess hem, and he daa is read from he USBFC receive FIFO and wrien ino local memory during he same bus ransacion. The DMA address couner is programmed o poin o he desinaion memory block in local shared memory, and he bye coun o he number of byes in he block o be ransferred. Afer he DMA conroller has been programmed, he DMA reques enable bi is se in he USBFC. The USB hos performs USB bulk or isochronous daa ransfers over he USB bus o he receive FIFO in he USBFC. If he FIFO fills up during a bulk ransfer, he USBFC will reurn a USB NAK acknowledge o he hos, signaling ha he daa could no be acceped. Packe daa which is in he FIFO or has already been ransferred by he DMA should be discarded. If he local CPU has salled his endpoin, he USBFC will no sore any daa ino he FIFO, and will respond wih a STALL acknowledge. As long as here is daa available in he FIFO, he USBFC will reques local DMA ransfers by assering DRQ. The DMA conroller hen requess he local bus from he local CPU. Afer he DMA conroller has been graned he bus, i drives a valid memory address and assers DACK_, IOR_, and MEMW_, hus ransferring a bye from he USBFC receive FIFO o memory. This process coninues unil he DMA bye coun reaches zero. A local bus inerrup may be programmed o occur when he DMA has finished. Once an end of packe occurs, an inerrup can be generaed o he local CPU. The local CPU can read a saus por o deec wheher he packe was acknowledged wih an ACK, NAK, or STALL. If none of hese acknowledge bis are se, hen a imeou has occurred. For NAK or imeou condiions a he compleion of bulk ransfers, he USB hos will send anoher OUT oken, and he USBFC should receive he same packe again. An early end-of-packe (EOP) can be deeced by he local CPU if he DMA coun is non-zero. The local and hos CPUs should hen decide how o proceed DMA Conrolled Local Bus o USB Transfers For device o hos ransfers, he local and hos CPUs firs arrange o ransfer a block of daa from local memory o hos memory. The local CPU hen programs he DMA conroller for fly-by demand mode ransfers. In his mode, ransfers occur only when he USBFC requess hem, and he daa is read from local memory and wrien ino he USBFC FIFO during he same bus ransacion. The DMA address couner is programmed o poin o he source memory block in local memory, and he bye coun o he number of byes in he block o be ransferred. Afer he DMA conroller has been programmed, he DMA reques enable bi is se in he USBFC. As long as here is space available in he FIFO and he bye coun is non-zero, he USBFC will reques DMA ransfers by assering DRQ. The DMA conroller hen EPSON 10

11 requess he local bus from he local CPU. Afer he DMA conroller has been graned he bus, i drives a valid memory address and assers DACK_, MEMR_, and IOW_, hus ransferring a bye from memory o he USBFC Transmi FIFO. Afer he DMA has been sared, he local CPU can signal he USB hos o sar a bulk read using endpoin 2. Isochronous packes occur a pre-arranged inervals, so no signaling is required. The USB hos sends an IN oken o he USBFC and sars a USB bulk or isochronous daa ransfer from he ransmi FIFO. The DMA ransfers coninue unil he DMA bye coun reaches zero. An inerrup can be generaed o he local CPU when he DMA has finished. When he ransmi FIFO becomes empy, he USBFC will erminae he packe wih an EOP (end of packe), signaling ha here is no more daa available. Once an end of packe occurs, an inerrup can be generaed o he local CPU. The local CPU can read a saus por o deec wheher he packe was acknowledged wih an ACK from he hos, or wheher he USBFC responded o he IN oken wih a NAK or STALL. If none of hese acknowledge bis are se, hen a imeou has occurred. For NAK or imeou condiions a he compleion of bulk ransfers, he USB hos will send anoher IN oken, and he USBFC should re-ransmi he same packe Terminaing DMA Transfers The EOT_ signal is used o hal a DMA ransfer, and is ypically provided by an exernal DMA conroller. I should be assered while DACK_ and IOR_ or IOW_ are simulaneously acive o indicae ha DMA aciviy has sopped. Alhough an EOT_ signal indicaes ha DMA has erminaed, he USB ransfer is no complee unil he las bye has been ransferred from he FIFO o he USB bus. The EOT_ reses he USBFC DMA reques enable bi. If no EOT_ signal is provided by he DMA conroller, he DMA ransfer can be haled a any ime by reseing he USBFC DMA reques enable bi. If he USBFC DMA reques enable bi is cleared during he middle of a DMA cycle, he curren cycle will complee before DMA requess are erminaed USB Endpoin 1 Receive Mailboxes Endpoin 1 is used for bulk ransfers from he USB hos o a se of 8 receive mailbox regisers which are read by he local CPU. The forma of he daa wrien o he mailbox is user defined. To ransfer an 8 bye packe, he hos firs performs a USB 8-bye bulk ransfer o he endpoin 1 receive mailbox regisers. A receive mailbox valid bi (bi 1 of regiser IRQSTAT1) is hen se which can cause a local bus inerrup. If he USB hos ries o wrie o hese regisers when he valid bi is se, a NAK acknowledge will be reurned. When he local CPU receives he inerrup, i reads he 8 byes and clears he valid bi.. The USB hos can hen send anoher 8-bye packe o his endpoin. An index poiner is used o access he receive mailboxes. I mus be iniialized by he local CPU, and is auomaically incremened afer he local CPU reads he receive mailbox daa regiser USB Endpoin 2 Transmi Mailboxes Endpoin 2 is used for inerrup ransfers o he USB hos from a se of 8 ransmi mailbox regisers which are wrien by he local CPU. To ransfer an 8 bye packe, he local CPU wries daa ino he 8 regisers and ses he ransmi mailbox valid bi. The hos performs a USB 8-bye inerrup ransfer from he endpoin 2 ransmi mailbox regisers. Afer he USB inerrup ransfer has compleed, he ransmi mailbox valid bi is cleared. The CPU should only wrie o he ransmi mailbox regisers when he valid bi is no se. This guaranees ha a previous inerrup ransfer has compleed before he regiser values are changed. If he USB hos ries o read endpoin 2 when he valid bi is no se, a NAK acknowledge is reurned. An index poiner is used o access he ransmi mailboxes. I mus be iniialized by he local CPU, and is auomaically incremened afer he local CPU reads or wries he ransmi mailbox daa regiser EPSON 11

12 3.3 Suspend Mode When here is a hree millisecond period of inaciviy on he USB, he USB specificaion requires a device o ener ino a low-power suspended sae. The device may no draw more han 500 μa of curren while in his sae. To faciliae his, he USBFC provides a suspend - reques inerrup and a suspend bi in he USB saus regiser. Addiionally, he USBFC allows he local CPU o send a device remoe wake-up reques -- a reques from he local CPU o wake-up he USB The Suspend Sequence The ypical sequence of operaion is as follows: during device configuraion, he local CPU will configure he USBFC o inerrup on a suspend reques (using he IRQENB1 regiser). When he USB is idle for hree milliseconds, he USBFC will generae a suspend - reques inerrup. The local CPU acceps his inerrup by clearing he corresponding bi in he IRQSTAT1 regiser, and performs he asks required o ensure ha no more han 500 μa of curren is drawn from he USB power bus. Then i wries a 1 o bi 7 of he USB saus regiser (USBSTAT) o iniiae he suspend. In suspend mode, OSC_RUN oupu pin goes low, and herefore he clock inpu ino CLK48_EARLY shoud be sopped. The SUSP_ oupu pin will be low while he device is in he suspended sae. Noe ha inpu pins on he USBFC should no be allowed o floa during suspend mode. The USBFC will leave suspend mode by deecing raffic on he USB bus or by a device remoe wake-up from he local CPU Device-Remoe Wake-Up The local CPU signals a device remoe wake-up by driving he WAKEUP_ inpu pin low. The USBFC will send a 10-ms wake-up signal o he USB hos, and drive OSC_RUN high and resar he clock inpu ino CLK48_EARLY. Two milliseconds afer he WAKEUP_ pin is assered, he SUSP_ line is driven high o indicae ha he USBFC has compleed is wake-up Hos-Iniiaed Wake-Up The hos may wake-up he USBFC by any non-idle sae on he USB. The USBFC will deec he hos s wake-up reques, and drive OSC_RUN high and resar he clock inpu ino CLK48_EARLY. Two milliseconds laer, he SUSP_ oupu signal is driven high o indicae ha he USBFC has compleed is wake-up. 3.4 USBFC Power Configuraion The USB specificaion defines boh bus-powered and self-powered devices. A bus-powered device is a peripheral which derives all of is power from he upsream USB connecor, while a self-powered device has an exernal power supply. The USBFC is well-suied for boh ypes of applicaions. The mos significan consideraion when deciding wheher o build a bus-powered or a self-powered device is power consumpion. The USB specificaion lays ou he following requiremens for maximum curren draw: A peripheral no configured by he hos (signified on he USBFC by he DEVCFG_ oupu pin) can draw only 100 ma from he USB power pins. A device may no draw more han 500 ma from he USB connecor s power pins. In suspend mode, he peripheral may no draw more han 500 μa from he USB connecor s power pins If hese power consideraions can be me wihou he use of an exernal power supply, he peripheral can be bus-powered; oherwise a self-powered design should be implemened. In case of self-powered and also power-sensiive applicaions, he USBFC can be forced o ener low-power suspend mode when disconneced from he USB. Seing bi 7 of he USBSTAT regiser when USB power has been removed forces he USBFC o ener low-power suspend mode. The USBFC will EPSON 12

13 auomaically wake-up when he peripheral is re-conneced o he USB. Do no force suspend mode unless he peripheral is disconneced from he USB. EPSON 13

14 4. Local Regisers 4.1 Regiser Descripion The USBFC occupies a 32 bye local regiser space which can be accessed by a CPU on he local bus. The Endpoin 1 Receive Mailbox Regisers are wrien by he USB hos, and he Endpoin 2 Transmi Mailbox Regisers are read by he USB hos. Afer he USBFC is powered-up or rese, he regisers are se o heir defaul values. Wries o unused regisers are ignored, and reads from unused regisers reurn a value of 0. For compaibiliy wih fuure revisions, unused bis wihin a regiser should always be wrien wih a zero. NOTE: The USB device and configuraion descripors canno be read by he USB hos unil he USBENB bi in he DMA conrol regiser is se. Unil hen, he device enumeraion process canno complee, so he device will no be recognized on he USB. 4.2 Regiser Summary Address Regiser Name Regiser Descripion USB Endpoin 0 DCTL DMA Conrol 1 IRQENB1 Inerrup Enable 1 2 IRQSTAT1 Inerrup Saus 1 3 IRQENB2 Inerrup Enable 2 4 IRQSTAT2 Inerrup Saus Reserved 8 EP1IDX Endpoin 1 Index Regiser 9 EP1DATA Endpoin 1 Receive Mailbox Daa Por 1 (USB o Local) A-B Reserved C EP2IDX Endpoin 2 Transmi Mailbox Index Regiser D EP2DATA Endpoin 2 Transmi Mailbox Daa Por 2 (Local o USB) E EP2POLL Endpoin 2 Inerrup Polling Inerval F Reserved 10 EP3DATA Endpoin 3 Receive FIFO Daa 3 11 EP3COUNT Endpoin 3 Receive FIFO Coun 12 EP3STAT Endpoin 3 Receive FIFO Saus 13 EP3PKSZ Endpoin 3 Maximum Packe Size 14 EP4DATA Endpoin 4 Transmi FIFO Daa 4 15 EP4COUNT Endpoin 4 Transmi FIFO Coun 16 EP4STAT Endpoin 4 Transmi FIFO Saus 17 EP4PKSZ Endpoin 4 Maximum Packe Size 18 REVISION USBFC Revision 19 USBSTAT USB Saus 1A FRAMEMSB Frame Couner MSB 1B FRAMELSB Frame Couner LSB 1C EXTIDX Exended Regiser Index 1D EXTDATA Exended Regiser Daa 1E-1F Reserved EPSON 14

15 4.3 (Address 00h; DCTL) DMA Conrol Regiser 7 Reserved. Yes No 0 6 Sofware EOT. This bi deermines he response o an IN reques from Endpoin 4 Yes Yes 0 when he ransmi FIFO is empy. If eiher his bi or he DMA EOT inpu pin are assered, he USBFC responds o an In reques from Endpoin 4 wih an ACK and a zero lengh packe if he FIFO is empy. If neiher his bi nor he DMA EOT inpu are assered, he USBFC responds o an In reques from Endpoin 4 wih an NACK if he FIFO is empy, indicaing ha i expecs o ransmi more daa. This bi can be cleared by an I/O wrie wih a daa value of 0. I is auomaically cleared when he USBFC responds o he hos wih a zero lengh packe when he FIFO is empy. 5 USB Enable. Any device or configuraion descripor reads from he hos will be Yes Yes 0 acknowledged wih a NAK unil his bi is se. This allows ime for he local CPU o se up he inerrup polling regiser, maximum packe size regisers, and oher configuraion regisers (e.g. Produc ID and Vendor ID) before he hos reads he descripors. 4 Endpoin 4 Sall. If his bi is se, hos bulk reads from he ransmi FIFO will resul Yes Yes 0 in a STALL acknowledge by he USBFC. No daa will be reurned o he USB hos. 3 Endpoin 3 Sall. If his bi is se, hos bulk wries o he receive FIFO will resul in Yes Yes 0 a STALL acknowledge by he USBFC. Receive daa will be discarded. 2 DMA Reques. This saus bi reflecs he sae of he DRQ oupu pin, and allows a Yes No 0 CPU on he local bus o monior DMA ransfers. 1 DMA Reques Enable. Wriing a 1 o his bi causes he USBFC o sar requesing DMA cycles from a DMA conroller on he local bus. If he EOT_ inpu is assered, his bi is auomaically rese. A CPU on he local bus may also explicily rese his bi o erminae a DMA ransfer. This bi can be read o deermine wheher a DMA ransfer is sill in progress. Yes Yes 0 0 DMA Direcion. This bi deermines he direcion of daa flow during a DMA Yes Yes 0 ransfer. 1 = Local bus o USB; 0 = USB o Local bus 4.4 (Address 01h; IRQENB1) Inerrup Enable Regiser 1 7 Suspend Reques Inerrup Enable. When se, his bi enables a local inerrup o Yes Yes 0 be se when he USB hos is requesing he USBFC o ener suspend mode. 6 SOF Inerrup Enable. When se, his bi enables a local inerrup o be se when a Yes Yes 0 sar-of-frame packe is received by he USBFC. 5 EOT Inerrup Enable. When se, his bi enables he local inerrup o be assered Yes Yes 0 when EOT_ signal is received from he DMA conroller. 4 Endpoin 4 Inerrup Enable. When se, his bi enables a local inerrup o be se Yes Yes 0 when a USB Endpoin 4 Daa Packe has been sen by he USBFC. 3 Endpoin 3 Inerrup Enable. When se, his bi enables a local inerrup o be se Yes Yes 0 when a USB Endpoin 3 Daa Packe has been received by he USBFC. 2 Endpoin 2 Inerrup Enable. When se, his bi enables a local inerrup o be se Yes Yes 0 when he USB Endpoin 2 Receive Mailbox regisers have been read by he USB hos. 1 Endpoin 1 Inerrup Enable. When se, his bi enables a local inerrup o be se Yes Yes 0 when he USB Endpoin 1 Transmi Mailbox regisers have been wrien o by he USB hos. 0 Reserved. Yes No 0 EPSON 15

16 4.5 (Address 02h; IRQSTAT1) Inerrup Saus Regiser 1 NOTE: These saus bis are se independenly of he corresponding inerrup enable bis. hese bis has no effec. Wriing a 0 o 7 Suspend Reques Inerrup Saus. This bi indicaes when a suspend-reques has Yes Yes/CLR 0 been received by he USBFC. This saus bi is cleared by wriing a 1. 6 SOF Inerrup Saus. This bi indicaes when a sar-of-frame packe has been Yes Yes/CLR 0 received by he USBFC. This saus bi is cleared by wriing a 1. 5 EOT Inerrup Saus. This bi indicaes when he EOT_ inpu has been assered Yes Yes/CLR 0 simulaneously wih DACK_ and eiher IOR_ or IOW_, indicaing he compleion of a DMA ransfer. This saus bi is cleared by wriing a 1. 4 Endpoin 4 Inerrup Saus. This bi indicaes when a USB Endpoin 4 Daa Yes Yes/CLR 0 packe has been sen by he USBFC. This saus bi is cleared by wriing a 1. 3 Endpoin 3 Inerrup Saus (Receive FIFO Valid). This bi indicaes when a Yes Yes/CLR 0 USB Endpoin 3 Daa packe has been received by he USBFC. This saus bi is cleared by wriing a 1. 2 Endpoin 2 Inerrup Saus. This bi indicaes when he USB Endpoin 2 Yes Yes/CLR 0 Mailbox regisers have been read by he USB hos. This saus bi is cleared by wriing a 1. 1 Endpoin 1 Inerrup Saus (Receive Mailbox Valid). This bi indicaes when Yes Yes/CLR 0 he USB Endpoin 1 Mailbox regisers have been wrien o by he USB hos. This saus bi is cleared by wriing a 1. 0 Upper Inerrup Acive. A leas one inerrup saus bi is se in he IRQSTAT2 regiser. Yes No (Address 03h; IRQENB2) Inerrup Enable Regiser 2 7:2 Reserved. Yes No 0 1 Transmi FIFO Almos Empy Inerrup Enable. When se, his bi enables a Yes Yes 0 local inerrup o be generaed when he Transmi FIFO Almos Empy saus bi is se. 0 Receive FIFO Almos Full Inerrup Enable. When se, his bi enables a local inerrup o be generaed when he Receive FIFO Almos Full saus bi is se. Yes Yes (Address 04h; IRQSTAT2) Inerrup Saus Regiser 2 NOTE: These saus bis are se independenly of he corresponding inerrup enable bis. hese bis has no effec. Wriing a 0 o 7:2 Reserved. Yes No 0 1 Transmi FIFO Almos Empy Saus. This bi is se when he number of byes Yes Yes/Clr 0 in he Transmi FIFO is equal o he Transmi FIFO Almos Empy Threshold, and anoher bye is sen o he USB bus from he FIFO. This saus bi is cleared by wriing a 1. 0 Receive FIFO Almos Full Saus. This bi is se when he number of byes in he Receive FIFO is equal o he Receive FIFO Almos Full Threshold, and anoher bye is received from he USB bus ino he FIFO. This saus bi is cleared by wriing a 1. Yes Yes/Clr 0 EPSON 16

17 4.8 (Address 08h; EP1IDX) Endpoin 1 Index Regiser 7:3 Reserved. Yes No 0 2:0 Endpoin 1 Index Regiser. This regiser deermines which Endpoin 1 Receive Mailbox is accessed when he Endpoin 1 Receive Mailbox Daa por is read. This regiser is auomaically incremened afer he Endpoin 1 Receive Mailbox Daa por is read. This index regiser wraps around o zero when i reaches he maximum coun. Yes Yes (Address 09h; EP1DATA) Endpoin 1 Receive Mailbox Daa 7:0 Endpoin 1 Receive Mailbox Daa. This por is used o read daa from one of he receive mailbox regisers. Daa is reurned from he regiser seleced by he Endpoin 1 Index Regiser. The eigh receive mailbox regisers are wrien by a USB bulk ransfer o endpoin 1, and can be used o pass messages from he USB hos o he local CPU. The forma and conen of he messages are user defined. If enabled, USB wries o his regiser can generae a local inerrup. Yes USB (Address 0Ch; EP2IDX) Endpoin 2 Index Regiser 7:3 Reserved. Yes No 0 2:0 Endpoin 2 Index Regiser. This regiser deermines which Endpoin 2 Transmi Mailbox is accessed when he Endpoin 2 Transmi Mailbox Daa Por is read or wrien. This regiser is auomaically incremened afer he Endpoin 2 Transmi Mailbox Daa por is read or wrien. This index regiser wraps around o zero when i reaches he maximum coun. Yes Yes (Address 0Dh; EP2DATA) Endpoin 2 Transmi Mailbox Daa 7:0 Endpoin 2 Transmi Mailbox Daa. This por is used o read or wrie one of he ransmi mailbox regisers. The regiser being accessed is seleced by he Endpoin 2 Index Regiser. The eigh Transmi Mailbox Regisers are wrien by he local CPU and are read by a USB inerrup ransfer from endpoin 2. They can be used o pass messages from he local CPU o he USB hos. The forma and conen of he messages are user defined. If enabled, USB reads from his regiser can generae a local inerrup. Yes Yes (Address 0Eh; EP2POLL) Endpoin 2 Inerrup Polling Inerval Regiser 7:0 Inerrup Polling Inerval Regiser. This regiser specifies he Endpoin 2 inerrup polling inerval in milliseconds. I can read by he hos hrough he endpoin 2 descripor. Yes Yes 0xFF EPSON 17

18 4.13 (Address 10h; EP3DATA) Endpoin 3 Receive FIFO Daa Regiser 7:0 Endpoin 3 Receive FIFO Daa Regiser. This regiser is used by he local CPU o read daa from he USB receive FIFO. The FIFO is wrien by he USB hos using bulk or isochronous ransfers o endpoin 3. Yes No (Address 11h; EP3COUNT) Endpoin 3 Receive FIFO Coun Regiser 7:0 Receive FIFO Coun. This regiser reurns he number of receive FIFO enries conaining valid enries. s range from 0 (empy) o 64 (full). Yes No (Address 12h; EP3STAT) Endpoin 3 Receive FIFO Saus Regiser 7:5 Reserved. Yes No 0 4 Receive FIFO Flush. Wriing o his bi causes he receive FIFO o be flushed. Yes Yes/Clr 0 Reading his bi always reurns a 0. 3 Receive FIFO Overflow. If se, his bi indicaes ha an aemp was made by he Yes Yes/Clr 0 USB hos o wrie o he receive FIFO when he receive FIFO was full. Wriing a 1 clears his bi. 2 Receive FIFO Underflow. If se, his bi indicaes ha an aemp was made o read Yes Yes/Clr 0 he receive FIFO when he receive FIFO was empy. Wriing a 1 clears his bi. 1 Receive FIFO Full. If se, his bi indicaes ha he receive FIFO is full. Yes No 0 0 Receive FIFO Empy. If se, his bi indicaes ha he receive FIFO is empy. Yes No (Address 13h; EP3PKSZ) Endpoin 3 Maximum Packe Size Regiser 7:0 Endpoin 3 Max Packe Size Regiser. This regiser specifies he maximum packe size for endpoin 3 in unis of 8 byes (defaul = 64 byes). I can be read by he hos hrough he endpoin 3 descripor. Yes Yes 0x (Address 14h; EP4DATA) Endpoin 4 Transmi FIFO Daa Regiser 7:0 Transmi FIFO Daa Regiser. This regiser is used by he local CPU o wrie daa o he ransmi FIFO. The FIFO is read by he USB hos using bulk or isochronous ransfers from endpoin 4. No Yes (Address 15h; EP4COUNT) Endpoin 4 Transmi FIFO Coun Regiser 7:0 Transmi FIFO Coun. This regiser reurns he number of ransmi FIFO enries conaining valid enries. s range from 0 (empy) o 64 (full). Yes No 0 EPSON 18

19 4.19 (Address 16h; EP4STAT) Endpoin 4 Transmi FIFO Saus Regiser 7:6 Reserved. Yes No 0 5 Transmi FIFO Valid. If se, his bi allows he daa in he FIFO o be read by he Yes Yes 0 nex read from he hos. This bi is auomaically cleared by a hos read. This bi is only used if bi 0 in regiser FIFOCTL is se. 4 Transmi FIFO Flush. Wriing o his bi causes he ransmi FIFO o be flushed. Yes Yes/Clr 0 Reading his bi always reurns a 0. 3 Transmi FIFO Overflow. If se, his bi indicaes ha an aemp was made by he Yes Yes/Clr 0 local CPU o wrie o he ransmi FIFO when he ransmi FIFO was full. Wriing a 1 clears his bi. 2 Transmi FIFO Underflow. If se, his bi indicaes ha an aemp was made by he Yes Yes/Clr 0 USB hos o read he ransmi FIFO when he ransmi FIFO was empy. Wriing a 1 clears his bi. 1 Transmi FIFO Full. If se, his bi indicaes ha he ransmi FIFO is full. Yes No 0 0 Transmi FIFO Empy. If se, his bi indicaes ha he ransmi FIFO is empy. Yes No (Address 17h; EP4PKSZ) Endpoin 4 Maximum Packe Size Regiser 7:0 Endpoin 4 Max Packe Size Regiser. This regiser specifies he maximum packe size for endpoin 4 in unis of 8 byes (defaul = 64 byes). I can be read by he hos hrough he endpoin 4 descripor. Yes Yes 0x (Address 18h; REVISION) Revision Regiser 7:0 USBFC Revision. This regiser reurns curren silicon revision number of he USBFC. Yes No Curren Revision EPSON 19

20 4.22 (Address 19h; USBSTAT) USB Saus Regiser 7 Suspend Conrol. If se, his bi indicaes ha here is a pending suspend reques Yes Yes/Clr 0 from he USB hos. Wriing a 1 clears his bi and causes he USBFC o ener suspended mode. 6 USB Endpoin 4 STALL. The las USB IN oken could no be serviced because Yes Yes/Clr 0 he endpoin was salled (DCTL regiser bi 4 se), and was acknowledged wih a STALL. Wriing a 1 clears his bi. 5 USB Endpoin 4 NAK. The las USB packe ransmied (IN packe) encounered Yes Yes/Clr 0 a FIFO underrun condiion, and was acknowledged wih a NAK. Wriing a 1 clears his bi. 4 USB Endpoin 4 ACK. The las USB packe ransmied (IN packe) was Yes Yes/Clr 0 successfully acknowledged wih an ACK from he USB hos. Wriing a 1 clears his bi. 3 USB Endpoin 3 STALL. The las USB packe received (OUT packe) could no Yes Yes/Clr 0 be acceped because he endpoin was salled (DCTL regiser bi 3 se), and was acknowledged wih a STALL. Wriing a 1 clears his bi. 2 USB Endpoin 3 NAK. The las USB packe received (OUT packe) could no be Yes Yes/Clr 0 acceped, and was acknowledged wih a NAK. The receive FIFO daa will be corruped and he local CPU should flush he FIFO. Wriing a 1 clears his bi. 1 USB Endpoin 3 ACK. The las USB packe received (OUT packe) was Yes Yes/Clr 0 successfully acknowledged wih an ACK. Wriing a 1 clears his bi. 0 Endpoin 2 Valid. When his bi is se, he 8-bye endpoin 2 mailbox regisers have been wrien by he local CPU, bu no ye read by he USB hos. The local CPU should no wrie ino hese regisers while his bi is se. Yes Yes (Address 1Ah; FRAMEMSB) Frame Couner MSB Regiser 7:3 Reserved. Yes No 0 2:0 Frame Couner MSB. This regiser conains he mos-significan bis of he frame couner from he mos recen sar-of-frame packe. Yes No (Address 1Bh; FRAMELSB) Frame Couner LSB Regiser 7:0 Frame Couner LSB. This regiser conains he leas-significan bis of he frame couner from he mos recen sar-of-frame packe. Yes No (Address 1Ch; EXTIDX) Exended Regiser Index 7:0 Exended Regiser Index. This regiser selecs which exended daa regiser is accessed when he EXTDATA por is read or wrien. Yes Yes 0 EPSON 20

21 4.26 (Address 1Dh; EXTDATA) Exended Regiser Daa 7:0 Exended Daa. This por provides access o one of he exended daa regisers. The index of he curren regiser is held in he EXTIDX regiser. See Below See Below See Below (Address 1Dh, Index 00h; VIDMSB) Vendor ID MSB 7:0 Vendor ID MSB. This regiser deermines he mos significan bye of he Vendor ID during a Ge Device Descripor reques. Yes Yes 0x (Address 1Dh, Index 01h; VIDLSB) Vendor ID LSB 7:0 Vendor ID LSB. This regiser deermines he leas significan bye of he Vendor ID during a Ge Device Descripor reques. Yes Yes 0xB (Address 1Dh, Index 02h; PIDMSB) Produc ID MSB 7:0 Produc ID MSB. This regiser deermines he mos significan bye of he Produc Yes Yes 0x88 ID during a Ge Device Descripor reques (Address 1Dh, Index 03h; PIDLSB) Produc ID LSB 7:0 Produc ID LSB. This regiser deermines he leas significan bye of he Produc ID during a Ge Device Descripor reques. Yes Yes 0x (Address 1Dh, Index 04h; RELMSB) Release Number MSB 7:0 Release Number MSB. This regiser deermines he mos significan bye of he device release number during a Ge Device Descripor reques. Yes Yes 0x (Address 1Dh, Index 05h; RELLSB) Release Number LSB 7:0 Release Number LSB. This regiser deermines he leas significan bye of he vendor-assigned revision code during a Ge Device Descripor reques. Yes Yes 0x00 EPSON 21

22 (Address 1Dh, Index 06h; RCVAFTH) Receive FIFO Almos Full Threshold 7:6 Reserved. Yes No 0x00 5:0 Receive FIFO Almos Full Threshold. This regiser deermines he hreshold a which he receive FIFO almos full saus bi is se. Yes Yes 0x3C (Address 1Dh, Index 07h; XMTAETH) Transmi FIFO Almos Empy Threshold 7:6 Reserved. Yes No 0x00 5:0 Transmi FIFO Almos Empy Threshold. This regiser deermines he hreshold a which he ransmi FIFO almos empy saus bi is se. Yes Yes 0x (Address 1Dh, Index 08h; USBCTL) USB Conrol 7:1 Reserved. Yes No 0x00 0 USB Sring Enable. When se, his bi allows he defaul Vendor and Produc ID Sring Descripors o be reurned o he hos. When his bi is cleared, he sring index values in he Device Descripor are se o zero, and sring descripor reads are acknowledged wih a sall. Yes Yes 0x (Address 1Dh, Index 09h; MAXPWR) Maximum Power Consumpion 7:0 Maximum Curren. The amoun of curren drawn by he peripheral from he USB por in incremens of 2 ma. The USBFC repors his value o he hos conroller in he configuraion descripor. The defaul is 500 ma (0xFA * 2 ma). Yes Yes 0xFA (Address 1Dh, Index 0Ah; PKTCTL) Packe Conrol 7 EP4 Daa Toggle Bi. Conains he value of he Daa Toggle bi o be sen in response o he nex IN oken o endpoin 4 from he USB hos. Yes Yes 0x0 / 0x1 (Toggle) 6 EP3 Daa Toggle Bi. Conains he value of he Daa Toggle bi expeced in he nex DATA packe o endpoin 3 from he USB hos. Yes Yes 0x0 / 0x1 (Toggle) 5 EP2 Daa Toggle Bi. Conains he value of he Daa Toggle bi o be sen in response o he nex IN oken o endpoin 2 from he USB hos. Yes Yes 0x0 / 0x1 (Toggle) 4 EP1 Daa Toggle Bi. Conains he value of he Daa Toggle bi expeced in he nex DATA packe o endpoin 1 from he USB hos. Yes Yes 0x0 / 0x1 (Toggle) 3 EP4 Daa Toggle Mode. When se, his bi reses he Daa Toggle bi o zero a he Yes Yes 0x0 end of a USB ransfer from EP4. When cleared, he Daa Toggle bi sricly oggles. 2 EP3 Daa Toggle Mode. When se, his bi reses he Daa Toggle bi o zero a he Yes Yes 0x0 end of a USB ransfer o EP3. When cleared, he Daa Toggle bi sricly oggles. 1 Reserved. Yes No 0x0 0 EP1 Daa Toggle Mode. When se, his bi reses he Daa Toggle bi o zero a he end of a USB ransfer o EP1. When cleared, he Daa Toggle bi sricly oggles. Yes Yes 0x0 EPSON 22

23 (Address 1Dh, Index 0Bh; LOCALCTL) Local-Side Conrol 7:1 Reserved. Yes No 0x00 0 Local Clock Oupu. This bi conrols he oupu of he LCLK pin. Yes Yes 0x0 0 = 48 MHz clock derived from CLKIN signal 1 = 12 MHz clock derived from USB bisream (for esing purposes) (Address 1Dh, Index 0Ch; FIFOCTL) FIFO Conrol 7:1 Reserved. Yes No 0x00 0 Transmi FIFO Valid Mode. When se, his bi causes a NAK response o a hos read reques from he ransmi FIFO (EP4) unless he FIFO Valid bi (in regiser EP4STAT) is se. When his bi is cleared, any daa waiing in he ransmi FIFO will be sen in response o a hos read reques, and he FIFO Valid bi is ignored. Yes Yes 0x0 EPSON 23

24 5. Sandard Device Requess 5.1 Conrol IN Transacions Ge Device Saus Byes Descripion 0 2 bis 15:2 = Reserved bi 1 = Device Remoe Wakeup enabled bi 0 = Device is operaing in Self-Powered mode. (depends on PWRGOOD_ inpu pin) 0x Ge Inerface Saus Byes Descripion 0 2 bis 15:0 = Reserved 0x Ge Endpoin 0,1,2,3,4 Saus Byes Descripion 0 2 bis 15:1 = Reserved bi 0 = Endpoin is salled Ge Device Descripor (18 Byes) Byes Descripion 0x Lengh 0x Type (device) 0x USB Specificaion Release Number 0x Class Code 0x Sub Class Code 0x Proocol 0x Maximum Endpoin 0 Packe Size 0x Vendor ID Deermined by Local Regiser VIDMSB, VIDLSB 10 2 Produc ID Deermined by Local Regiser PIDMSB, PIDLSB 12 2 Device Release Number Deermined by Local Regiser PIDMSB, PIDLSB 14 1 Index of sring descripor describing manufacurer 0x Index of sring descripor describing produc 0x Index of sring descripor describing serial number 0x configuraions 0x01 EPSON 24

25 5.1.5 Ge Configuraion Descripor (46 byes) Noe ha all inerface and endpoin descripors are reurned when his reques is issued Byes Descripion Configuraion Descripor 0 1 Lengh 0x Type (configuraion) 0x Toal lengh reurned for his configuraion 0x002E 4 1 Inerfaces 0x his configuraion 0x Index of sring descripor describing his configuraion 0x Aribues bi 7 = Bus Powered (depends on BUSPWR_ inpu pin) bi 6 = Self-Powered (depends on BUSPWR_ inpu pin) bi 5 = Remoe-Wakeup bis 4:0 = Reserved 8 1 Maximum USB power required (in 2 ma unis) (depends on BUSPWR_ inpu pin) 0x60 (if self powered) 0xA0 (if bus powered) 0x32 (if self powered) 0xFA (if bus powered) Inerface 0 Descripor 0 1 Size of his descripor in byes 0x Type (inerface) 0x his inerface 0x Alernae Inerface 0x endpoins used by his inerface (excluding endpoin 0x04 0) 5 1 Class Code 0x Sub Class Code 0x Device Proocol 0x Index of sring descripor describing his inerface 0x00 Endpoin 1 Descripor 0 1 Size of his descripor 0x Descripor Type (endpoin) 0x Endpoin Address 0x01 bi 7 = direcion (1 = IN, 0 = OUT) bis 6:4 = reserved bis 3:0 = endpoin number 3 1 Endpoin Aribues 0x02 bis 7:2 = reserved bis 1:0 00 = Conrol 01 = Isochronous 10 = Bulk 11 = Inerrup 4 2 Maximum packe size of his endpoin 0x Inerval for polling endpoin (no used) 0x00 EPSON 25

26 Ge Configuraion Descripor (coninued) Byes Descripion Endpoin 2 Descripor 0 1 Size of his descripor 0x Descripor Type (endpoin) 0x Endpoin Address 0x82 bi 7 = direcion (1 = IN, 0 = OUT) bis 6:4 = reserved bis 3:0 = endpoin number 3 1 Endpoin Aribues 0x03 bis 7:2 = reserved bis 1:0 00 = Conrol 01 = Isochronous 10 = Bulk 11 = Inerrup 4 2 Maximum packe size of his endpoin 0x Inerval for polling endpoin Deermined by Local Regiser EP2POLL Endpoin 3 Descripor 0 1 Size of his descripor 0x Descripor Type (endpoin) 0x Endpoin Address bi 7 = direcion (1 = IN, 0 = OUT) bis 6:4 = reserved bis 3:0 = endpoin number 0x Endpoin Aribues bis 7:2 = reserved bis 1:0 00 = Conrol 01 = Isochronous 10 = Bulk 11 = Inerrup 4 2 Maximum packe size of his endpoin for bulk mode Bus Time for isochronous mode 0x02 for bulk 0x01 for isochronous Deermined by Local Regiser EP3PKSZ 6 1 Inerval for polling endpoin 0x00 for bulk 0x01 for isochronous Endpoin 4 Descripor 0 1 Size of his descripor 0x Descripor Type (endpoin) 0x Endpoin Address bi 7 = direcion (1 = IN, 0 = OUT) bis 6:4 = reserved bis 3:0 = endpoin number 0x Endpoin Aribues bis 7:2 = reserved bis 1:0 00 = Conrol 01 = Isochronous 10 = Bulk 11 = Inerrup 4 2 Maximum packe size of his endpoin for bulk mode Bus Time for isochronous mode 0x02 for bulk 0x01 for isochronous Deermined by Local Regiser EP4PKSZ 6 1 Inerval for polling endpoin 0x00 for bulk 0x01 for isochronous EPSON 26

27 5.1.6 Ge Sring Descripor 0 Byes Descripion 0 2 Language ID (English = 09, U.S. = 04) 0x0403 0x Ge Sring Descripor 1 Byes Descripion 0 24 Manufacurer Descripor 0x1803 SEIKO EPSON Ge Sring Descripor 2 Byes Descripion 0 66 Produc Descripor 0x4203 USB Inerface Conroller TEST Ge Configuraion Byes Descripion 0 1 Reurns curren device configuraion 0x Ge Inerface Byes Descripion 0 1 Reurns curren alernae seing for he specified inerface 0x00 EPSON 27

28 5.2 Conrol OUT Transacions Se Address Byes Descripion -- 0 Ses USB address of device = device address, Index = Se Configuraion Byes Descripion -- 0 Ses he device configuraion = Configuraion value (0 or 1 suppored), Se Inerface Byes Descripion -- 0 Selecs alernae seing for specified inerface = Alernae seing, Index = specified inerface Device Clear Feaure Byes Descripion -- 0 Clear he seleced device feaure = feaure selecor FS = 1 --> Device Remoe Wakeup (disable) Device Se Feaure Byes Descripion -- 0 Se he seleced device feaure = feaure selecor FS = 1 --> Device Remoe Wakeup (enable) Endpoin 0,1,2,3,4 Clear Feaure Byes Descripion -- 0 Clear he seleced endpoin feaure = feaure selecor, Index = endpoin number FS = 0 --> Endpoin sall (clears sall bi) EPSON 28

29 5.2.7 Endpoin 0,1,2,3,4 Se Feaure Byes Descripion -- 0 Se he seleced endpoin feaure = feaure selecor, Index = endpoin number FS = 0 --> Endpoin sall (ses sall bi) -- EPSON 29

30 5.3 Endpoin 1 OUT Transacions (Receive Mailboxes) Byes Descripion -- 8 Hos wries 8 byes o he receive mailboxes using bulk OUT ransacions Endpoin 2 IN Transacions (Transmi Mailboxes) Byes Descripion -- 8 Hos reads 8 byes from he ransmi mailboxes using inerrup IN ransacions Endpoin 3 OUT Transacions (Receive FIFO) Byes Descripion -- up o 64 Hos wries daa ino he receive FIFO using bulk or isochronous OUT ransacions Endpoin 4 IN Transacions (Transmi FIFO) Byes Descripion -- up o 64 Hos reads daa from he ransmi FIFO using bulk or isochronous IN ransacions Vendor Device Requess 6.1 Device Clear Feaure Byes Descripion -- 0 Clear he seleced device feaure = feaure selecor FS = 0x80 --> Timing es mode (clears es bi) Device Se Feaure Byes Descripion -- 0 Se he seleced device feaure = feaure selecor FS = 0x80 --> Timing es mode (ses es bi) -- EPSON 30

31 7. Timing 7.1 Local Bus Wrie o Regiser NAME DESCRIPTION MIN MAX UNIT T1 Address seup o wrie enable* 10 ns T2 Address hold from end of wrie enable* 0 ns T3 Wrie enable widh* 25 ns T4 Chip selec hold from end of IOW_ 0 ns T5 Daa seup o end of wrie enable* 5 ns T6 Daa hold ime from end of IOW_ 5 ns T7 I/O Recovery Time 60 ns Wrie enable is he occurrence of boh IOW_ and CS_. A[4:0] T1 T2 CS# T3 T4 IOW# T7 T5 T6 D[7:0] EPSON 31

32 7.2 Local Bus Read from Regiser NAME DESCRIPTION MIN MAX UNIT T1 Address seup o read enable* 10 ns T2 Address hold from end of read enable* 0 ns T3 Chip selec hold from end of IOR_ 0 ns T4 Daa access ime from read enable* 8 ns T5 Daa ri-sae ime from end of IOR_ 9 ns T6 I/O Recovery Time 60 ns Read enable is he occurrence of boh IOR_ and CS_. A[4:0] T1 T2 CS# T3 IOR# T6 T4 T5 D[7:0] EPSON 32