?? fx2regs.h
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//-----------------------------------------------------------------------------
// File: FX2regs.h
// Contents: EZ-USB FX2 register declarations and bit mask definitions.
//
// $Archive: /USB/atapifx2/software/fx2regs.h $
// $Date: 1/14/02 11:37a $
// $Revision: 3 $
//
//
// Copyright (c) 2000 Cypress Semiconductor, All rights reserved
//-----------------------------------------------------------------------------
#ifndef FX2REGS_H /* Header Sentry */
#define FX2REGS_H
//-----------------------------------------------------------------------------
// FX2 Related Register Assignments
//-----------------------------------------------------------------------------
// The Ez-USB FX2 registers are defined here. We use FX2regs.h for register
// address allocation by using "#define ALLOCATE_EXTERN".
// When using "#define ALLOCATE_EXTERN", you get (for instance):
// xdata volatile BYTE OUT7BUF[64] _at_ 0x7B40;
// Such lines are created from FX2.h by using the preprocessor.
// Incidently, these lines will not generate any space in the resulting hex
// file; they just bind the symbols to the addresses for compilation.
// You just need to put "#define ALLOCATE_EXTERN" in your main program file;
// i.e. fw.c or a stand-alone C source file.
// Without "#define ALLOCATE_EXTERN", you just get the external reference:
// extern xdata volatile BYTE OUT7BUF[64] ;// 0x7B40;
// This uses the concatenation operator "##" to insert a comment "//"
// to cut off the end of the line, "_at_ 0x7B40;", which is not wanted.
#ifdef ALLOCATE_EXTERN
#define EXTERN
#define _AT_ _at_
#else
#define EXTERN extern
#define _AT_ ;/ ## /
#endif
#define XBYTE ((BYTE volatile xdata*) 0)
#define XWORD ((WORD volatile xdata*) 0)
EXTERN xdata volatile BYTE GPIF_WAVE_DATA _AT_ 0xE400;
EXTERN xdata volatile BYTE RES_WAVEDATA_END _AT_ 0xE480;
// General Configuration
EXTERN xdata volatile BYTE CPUCS _AT_ 0xE600; // Control & Status
EXTERN xdata volatile BYTE IFCONFIG _AT_ 0xE601; // Interface Configuration
EXTERN xdata volatile BYTE PINFLAGSAB _AT_ 0xE602; // FIFO FLAGA and FLAGB Assignments
EXTERN xdata volatile BYTE PINFLAGSCD _AT_ 0xE603; // FIFO FLAGC and FLAGD Assignments
EXTERN xdata volatile BYTE FIFORESET _AT_ 0xE604; // Restore FIFOS to default state
EXTERN xdata volatile BYTE BREAKPT _AT_ 0xE605; // Breakpoint
EXTERN xdata volatile BYTE BPADDRH _AT_ 0xE606; // Breakpoint Address H
EXTERN xdata volatile BYTE BPADDRL _AT_ 0xE607; // Breakpoint Address L
EXTERN xdata volatile BYTE UART230 _AT_ 0xE608; // 230 Kbaud clock for T0,T1,T2
EXTERN xdata volatile BYTE FIFOPINPOLAR _AT_ 0xE609; // FIFO polarities
EXTERN xdata volatile BYTE REVID _AT_ 0xE60A; // Chip Revision
EXTERN xdata volatile BYTE REVCTL _AT_ 0xE60B; // Chip Revision Control
// Endpoint Configuration
EXTERN xdata volatile BYTE EP1OUTCFG _AT_ 0xE610; // Endpoint 1-OUT Configuration
EXTERN xdata volatile BYTE EP1INCFG _AT_ 0xE611; // Endpoint 1-IN Configuration
EXTERN xdata volatile BYTE EP2CFG _AT_ 0xE612; // Endpoint 2 Configuration
EXTERN xdata volatile BYTE EP4CFG _AT_ 0xE613; // Endpoint 4 Configuration
EXTERN xdata volatile BYTE EP6CFG _AT_ 0xE614; // Endpoint 6 Configuration
EXTERN xdata volatile BYTE EP8CFG _AT_ 0xE615; // Endpoint 8 Configuration
EXTERN xdata volatile BYTE EP2FIFOCFG _AT_ 0xE618; // Endpoint 2 FIFO configuration
EXTERN xdata volatile BYTE EP4FIFOCFG _AT_ 0xE619; // Endpoint 4 FIFO configuration
EXTERN xdata volatile BYTE EP6FIFOCFG _AT_ 0xE61A; // Endpoint 6 FIFO configuration
EXTERN xdata volatile BYTE EP8FIFOCFG _AT_ 0xE61B; // Endpoint 8 FIFO configuration
EXTERN xdata volatile BYTE EP2AUTOINLENH _AT_ 0xE620; // Endpoint 2 Packet Length H (IN only)
EXTERN xdata volatile BYTE EP2AUTOINLENL _AT_ 0xE621; // Endpoint 2 Packet Length L (IN only)
EXTERN xdata volatile BYTE EP4AUTOINLENH _AT_ 0xE622; // Endpoint 4 Packet Length H (IN only)
EXTERN xdata volatile BYTE EP4AUTOINLENL _AT_ 0xE623; // Endpoint 4 Packet Length L (IN only)
EXTERN xdata volatile BYTE EP6AUTOINLENH _AT_ 0xE624; // Endpoint 6 Packet Length H (IN only)
EXTERN xdata volatile BYTE EP6AUTOINLENL _AT_ 0xE625; // Endpoint 6 Packet Length L (IN only)
EXTERN xdata volatile BYTE EP8AUTOINLENH _AT_ 0xE626; // Endpoint 8 Packet Length H (IN only)
EXTERN xdata volatile BYTE EP8AUTOINLENL _AT_ 0xE627; // Endpoint 8 Packet Length L (IN only)
EXTERN xdata volatile BYTE EP2FIFOPFH _AT_ 0xE630; // EP2 Programmable Flag trigger H
EXTERN xdata volatile BYTE EP2FIFOPFL _AT_ 0xE631; // EP2 Programmable Flag trigger L
EXTERN xdata volatile BYTE EP4FIFOPFH _AT_ 0xE632; // EP4 Programmable Flag trigger H
EXTERN xdata volatile BYTE EP4FIFOPFL _AT_ 0xE633; // EP4 Programmable Flag trigger L
EXTERN xdata volatile BYTE EP6FIFOPFH _AT_ 0xE634; // EP6 Programmable Flag trigger H
EXTERN xdata volatile BYTE EP6FIFOPFL _AT_ 0xE635; // EP6 Programmable Flag trigger L
EXTERN xdata volatile BYTE EP8FIFOPFH _AT_ 0xE636; // EP8 Programmable Flag trigger H
EXTERN xdata volatile BYTE EP8FIFOPFL _AT_ 0xE637; // EP8 Programmable Flag trigger L
EXTERN xdata volatile BYTE EP2ISOINPKTS _AT_ 0xE640; // EP2 (if ISO) IN Packets per frame (1-3)
EXTERN xdata volatile BYTE EP4ISOINPKTS _AT_ 0xE641; // EP4 (if ISO) IN Packets per frame (1-3)
EXTERN xdata volatile BYTE EP6ISOINPKTS _AT_ 0xE642; // EP6 (if ISO) IN Packets per frame (1-3)
EXTERN xdata volatile BYTE EP8ISOINPKTS _AT_ 0xE643; // EP8 (if ISO) IN Packets per frame (1-3)
EXTERN xdata volatile BYTE INPKTEND _AT_ 0xE648; // Force IN Packet End
EXTERN xdata volatile BYTE OUTPKTEND _AT_ 0xE649; // Force OUT Packet End
// Interrupts
EXTERN xdata volatile BYTE EP2FIFOIE _AT_ 0xE650; // Endpoint 2 Flag Interrupt Enable
EXTERN xdata volatile BYTE EP2FIFOIRQ _AT_ 0xE651; // Endpoint 2 Flag Interrupt Request
EXTERN xdata volatile BYTE EP4FIFOIE _AT_ 0xE652; // Endpoint 4 Flag Interrupt Enable
EXTERN xdata volatile BYTE EP4FIFOIRQ _AT_ 0xE653; // Endpoint 4 Flag Interrupt Request
EXTERN xdata volatile BYTE EP6FIFOIE _AT_ 0xE654; // Endpoint 6 Flag Interrupt Enable
EXTERN xdata volatile BYTE EP6FIFOIRQ _AT_ 0xE655; // Endpoint 6 Flag Interrupt Request
EXTERN xdata volatile BYTE EP8FIFOIE _AT_ 0xE656; // Endpoint 8 Flag Interrupt Enable
EXTERN xdata volatile BYTE EP8FIFOIRQ _AT_ 0xE657; // Endpoint 8 Flag Interrupt Request
EXTERN xdata volatile BYTE IBNIE _AT_ 0xE658; // IN-BULK-NAK Interrupt Enable
EXTERN xdata volatile BYTE IBNIRQ _AT_ 0xE659; // IN-BULK-NAK interrupt Request
EXTERN xdata volatile BYTE NAKIE _AT_ 0xE65A; // Endpoint Ping NAK interrupt Enable
EXTERN xdata volatile BYTE NAKIRQ _AT_ 0xE65B; // Endpoint Ping NAK interrupt Request
EXTERN xdata volatile BYTE USBIE _AT_ 0xE65C; // USB Int Enables
EXTERN xdata volatile BYTE USBIRQ _AT_ 0xE65D; // USB Interrupt Requests
EXTERN xdata volatile BYTE EPIE _AT_ 0xE65E; // Endpoint Interrupt Enables
EXTERN xdata volatile BYTE EPIRQ _AT_ 0xE65F; // Endpoint Interrupt Requests
EXTERN xdata volatile BYTE GPIFIE _AT_ 0xE660; // GPIF Interrupt Enable
EXTERN xdata volatile BYTE GPIFIRQ _AT_ 0xE661; // GPIF Interrupt Request
EXTERN xdata volatile BYTE USBERRIE _AT_ 0xE662; // USB Error Interrupt Enables
EXTERN xdata volatile BYTE USBERRIRQ _AT_ 0xE663; // USB Error Interrupt Requests
EXTERN xdata volatile BYTE ERRCNTLIM _AT_ 0xE664; // USB Error counter and limit
EXTERN xdata volatile BYTE CLRERRCNT _AT_ 0xE665; // Clear Error Counter EC[3..0]
EXTERN xdata volatile BYTE INT2IVEC _AT_ 0xE666; // Interupt 2 (USB) Autovector
EXTERN xdata volatile BYTE INT4IVEC _AT_ 0xE667; // Interupt 4 (FIFOS & GPIF) Autovector
EXTERN xdata volatile BYTE INTSETUP _AT_ 0xE668; // Interrupt 2&4 Setup
// Input/Output
EXTERN xdata volatile BYTE PORTACFG _AT_ 0xE670; // I/O PORTA Alternate Configuration
EXTERN xdata volatile BYTE PORTCCFG _AT_ 0xE671; // I/O PORTC Alternate Configuration
EXTERN xdata volatile BYTE PORTECFG _AT_ 0xE672; // I/O PORTE Alternate Configuration
EXTERN xdata volatile BYTE I2CS _AT_ 0xE678; // Control & Status
EXTERN xdata volatile BYTE I2DAT _AT_ 0xE679; // Data
EXTERN xdata volatile BYTE I2CTL _AT_ 0xE67A; // I2C Control
EXTERN xdata volatile BYTE XAUTODAT1 _AT_ 0xE67B; // Autoptr1 MOVX access
EXTERN xdata volatile BYTE XAUTODAT2 _AT_ 0xE67C; // Autoptr2 MOVX access
#define EXTAUTODAT1 XAUTODAT1
#define EXTAUTODAT2 XAUTODAT2
// USB Control
EXTERN xdata volatile BYTE USBCS _AT_ 0xE680; // USB Control & Status
EXTERN xdata volatile BYTE SUSPEND _AT_ 0xE681; // Put chip into suspend
EXTERN xdata volatile BYTE WAKEUPCS _AT_ 0xE682; // Wakeup source and polarity
EXTERN xdata volatile BYTE TOGCTL _AT_ 0xE683; // Toggle Control
EXTERN xdata volatile BYTE USBFRAMEH _AT_ 0xE684; // USB Frame count H
EXTERN xdata volatile BYTE USBFRAMEL _AT_ 0xE685; // USB Frame count L
EXTERN xdata volatile BYTE MICROFRAME _AT_ 0xE686; // Microframe count, 0-7
EXTERN xdata volatile BYTE FNADDR _AT_ 0xE687; // USB Function address
// Endpoints
EXTERN xdata volatile BYTE EP0BCH _AT_ 0xE68A; // Endpoint 0 Byte Count H
EXTERN xdata volatile BYTE EP0BCL _AT_ 0xE68B; // Endpoint 0 Byte Count L
EXTERN xdata volatile BYTE EP1OUTBC _AT_ 0xE68D; // Endpoint 1 OUT Byte Count
EXTERN xdata volatile BYTE EP1INBC _AT_ 0xE68F; // Endpoint 1 IN Byte Count
EXTERN xdata volatile BYTE EP2BCH _AT_ 0xE690; // Endpoint 2 Byte Count H
EXTERN xdata volatile BYTE EP2BCL _AT_ 0xE691; // Endpoint 2 Byte Count L
EXTERN xdata volatile BYTE EP4BCH _AT_ 0xE694; // Endpoint 4 Byte Count H
EXTERN xdata volatile BYTE EP4BCL _AT_ 0xE695; // Endpoint 4 Byte Count L
EXTERN xdata volatile BYTE EP6BCH _AT_ 0xE698; // Endpoint 6 Byte Count H
EXTERN xdata volatile BYTE EP6BCL _AT_ 0xE699; // Endpoint 6 Byte Count L
EXTERN xdata volatile BYTE EP8BCH _AT_ 0xE69C; // Endpoint 8 Byte Count H
EXTERN xdata volatile BYTE EP8BCL _AT_ 0xE69D; // Endpoint 8 Byte Count L
EXTERN xdata volatile BYTE EP0CS _AT_ 0xE6A0; // Endpoint Control and Status
EXTERN xdata volatile BYTE EP1OUTCS _AT_ 0xE6A1; // Endpoint 1 OUT Control and Status
EXTERN xdata volatile BYTE EP1INCS _AT_ 0xE6A2; // Endpoint 1 IN Control and Status
EXTERN xdata volatile BYTE EP2CS _AT_ 0xE6A3; // Endpoint 2 Control and Status
EXTERN xdata volatile BYTE EP4CS _AT_ 0xE6A4; // Endpoint 4 Control and Status
EXTERN xdata volatile BYTE EP6CS _AT_ 0xE6A5; // Endpoint 6 Control and Status
EXTERN xdata volatile BYTE EP8CS _AT_ 0xE6A6; // Endpoint 8 Control and Status
EXTERN xdata volatile BYTE EP2FIFOFLGS _AT_ 0xE6A7; // Endpoint 2 Flags
EXTERN xdata volatile BYTE EP4FIFOFLGS _AT_ 0xE6A8; // Endpoint 4 Flags
EXTERN xdata volatile BYTE EP6FIFOFLGS _AT_ 0xE6A9; // Endpoint 6 Flags
EXTERN xdata volatile BYTE EP8FIFOFLGS _AT_ 0xE6AA; // Endpoint 8 Flags
EXTERN xdata volatile BYTE EP2FIFOBCH _AT_ 0xE6AB; // EP2 FIFO total byte count H
EXTERN xdata volatile BYTE EP2FIFOBCL _AT_ 0xE6AC; // EP2 FIFO total byte count L
EXTERN xdata volatile BYTE EP4FIFOBCH _AT_ 0xE6AD; // EP4 FIFO total byte count H
EXTERN xdata volatile BYTE EP4FIFOBCL _AT_ 0xE6AE; // EP4 FIFO total byte count L
EXTERN xdata volatile BYTE EP6FIFOBCH _AT_ 0xE6AF; // EP6 FIFO total byte count H
EXTERN xdata volatile BYTE EP6FIFOBCL _AT_ 0xE6B0; // EP6 FIFO total byte count L
EXTERN xdata volatile BYTE EP8FIFOBCH _AT_ 0xE6B1; // EP8 FIFO total byte count H
EXTERN xdata volatile BYTE EP8FIFOBCL _AT_ 0xE6B2; // EP8 FIFO total byte count L
EXTERN xdata volatile BYTE SUDPTRH _AT_ 0xE6B3; // Setup Data Pointer high address byte
EXTERN xdata volatile BYTE SUDPTRL _AT_ 0xE6B4; // Setup Data Pointer low address byte
EXTERN xdata volatile BYTE SUDPTRCTL _AT_ 0xE6B5; // Setup Data Pointer Auto Mode
EXTERN xdata volatile BYTE SETUPDAT[8] _AT_ 0xE6B8; // 8 bytes of SETUP data
// GPIF
EXTERN xdata volatile BYTE GPIFWFSELECT _AT_ 0xE6C0; // Waveform Selector
EXTERN xdata volatile BYTE GPIFIDLECS _AT_ 0xE6C1; // GPIF Done, GPIF IDLE drive mode
EXTERN xdata volatile BYTE GPIFIDLECTL _AT_ 0xE6C2; // Inactive Bus, CTL states
EXTERN xdata volatile BYTE GPIFCTLCFG _AT_ 0xE6C3; // CTL OUT pin drive
EXTERN xdata volatile BYTE GPIFADRH _AT_ 0xE6C4; // GPIF Address H
EXTERN xdata volatile BYTE GPIFADRL _AT_ 0xE6C5; // GPIF Address L
EXTERN xdata volatile BYTE GPIFTCB3 _AT_ 0xE6CE; // GPIF Transaction Count Byte 3
EXTERN xdata volatile BYTE GPIFTCB2 _AT_ 0xE6CF; // GPIF Transaction Count Byte 2
EXTERN xdata volatile BYTE GPIFTCB1 _AT_ 0xE6D0; // GPIF Transaction Count Byte 1
EXTERN xdata volatile BYTE GPIFTCB0 _AT_ 0xE6D1; // GPIF Transaction Count Byte 0
#define EP2GPIFTCH GPIFTCB1 // these are here for backwards compatibility
#define EP2GPIFTCL GPIFTCB0 // before REVE silicon (ie. REVB and REVD)
#define EP4GPIFTCH GPIFTCB1 // these are here for backwards compatibility
#define EP4GPIFTCL GPIFTCB0 // before REVE silicon (ie. REVB and REVD)
#define EP6GPIFTCH GPIFTCB1 // these are here for backwards compatibility
#define EP6GPIFTCL GPIFTCB0 // before REVE silicon (ie. REVB and REVD)
#define EP8GPIFTCH GPIFTCB1 // these are here for backwards compatibility
#define EP8GPIFTCL GPIFTCB0 // before REVE silicon (ie. REVB and REVD)
//EXTERN xdata volatile BYTE EP2GPIFTCH _AT_ 0xE6D0; // EP2 GPIF Transaction Count High
//EXTERN xdata volatile BYTE EP2GPIFTCL _AT_ 0xE6D1; // EP2 GPIF Transaction Count Low
EXTERN xdata volatile BYTE EP2GPIFFLGSEL _AT_ 0xE6D2; // EP2 GPIF Flag select
EXTERN xdata volatile BYTE EP2GPIFPFSTOP _AT_ 0xE6D3; // Stop GPIF EP2 transaction on prog. flag
EXTERN xdata volatile BYTE EP2GPIFTRIG _AT_ 0xE6D4; // EP2 FIFO Trigger
//EXTERN xdata volatile BYTE EP4GPIFTCH _AT_ 0xE6D8; // EP4 GPIF Transaction Count High
//EXTERN xdata volatile BYTE EP4GPIFTCL _AT_ 0xE6D9; // EP4 GPIF Transactionr Count Low
EXTERN xdata volatile BYTE EP4GPIFFLGSEL _AT_ 0xE6DA; // EP4 GPIF Flag select
EXTERN xdata volatile BYTE EP4GPIFPFSTOP _AT_ 0xE6DB; // Stop GPIF EP4 transaction on prog. flag
EXTERN xdata volatile BYTE EP4GPIFTRIG _AT_ 0xE6DC; // EP4 FIFO Trigger
//EXTERN xdata volatile BYTE EP6GPIFTCH _AT_ 0xE6E0; // EP6 GPIF Transaction Count High
//EXTERN xdata volatile BYTE EP6GPIFTCL _AT_ 0xE6E1; // EP6 GPIF Transaction Count Low
EXTERN xdata volatile BYTE EP6GPIFFLGSEL _AT_ 0xE6E2; // EP6 GPIF Flag select
EXTERN xdata volatile BYTE EP6GPIFPFSTOP _AT_ 0xE6E3; // Stop GPIF EP6 transaction on prog. flag
EXTERN xdata volatile BYTE EP6GPIFTRIG _AT_ 0xE6E4; // EP6 FIFO Trigger
//EXTERN xdata volatile BYTE EP8GPIFTCH _AT_ 0xE6E8; // EP8 GPIF Transaction Count High
//EXTERN xdata volatile BYTE EP8GPIFTCL _AT_ 0xE6E9; // EP8GPIF Transaction Count Low
EXTERN xdata volatile BYTE EP8GPIFFLGSEL _AT_ 0xE6EA; // EP8 GPIF Flag select
EXTERN xdata volatile BYTE EP8GPIFPFSTOP _AT_ 0xE6EB; // Stop GPIF EP8 transaction on prog. flag
EXTERN xdata volatile BYTE EP8GPIFTRIG _AT_ 0xE6EC; // EP8 FIFO Trigger
EXTERN xdata volatile BYTE XGPIFSGLDATH _AT_ 0xE6F0; // GPIF Data H (16-bit mode only)
EXTERN xdata volatile BYTE XGPIFSGLDATLX _AT_ 0xE6F1; // Read/Write GPIF Data L & trigger transac
EXTERN xdata volatile BYTE XGPIFSGLDATLNOX _AT_ 0xE6F2; // Read GPIF Data L, no transac trigger
EXTERN xdata volatile BYTE GPIFREADYCFG _AT_ 0xE6F3; // Internal RDY,Sync/Async, RDY5CFG
EXTERN xdata volatile BYTE GPIFREADYSTAT _AT_ 0xE6F4; // RDY pin states
EXTERN xdata volatile BYTE GPIFABORT _AT_ 0xE6F5; // Abort GPIF cycles
// UDMA
EXTERN xdata volatile BYTE FLOWSTATE _AT_ 0xE6C6; //Defines GPIF flow state
EXTERN xdata volatile BYTE FLOWLOGIC _AT_ 0xE6C7; //Defines flow/hold decision criteria
EXTERN xdata volatile BYTE FLOWEQ0CTL _AT_ 0xE6C8; //CTL states during active flow state
EXTERN xdata volatile BYTE FLOWEQ1CTL _AT_ 0xE6C9; //CTL states during hold flow state
EXTERN xdata volatile BYTE FLOWHOLDOFF _AT_ 0xE6CA;
EXTERN xdata volatile BYTE FLOWSTB _AT_ 0xE6CB; //CTL/RDY Signal to use as master data strobe
EXTERN xdata volatile BYTE FLOWSTBEDGE _AT_ 0xE6CC; //Defines active master strobe edge
EXTERN xdata volatile BYTE FLOWSTBHPERIOD _AT_ 0xE6CD; //Half Period of output master strobe
EXTERN xdata volatile BYTE GPIFHOLDAMOUNT _AT_ 0xE60C; //Data delay shift
EXTERN xdata volatile BYTE UDMACRCH _AT_ 0xE67D; //CRC Upper byte
EXTERN xdata volatile BYTE UDMACRCL _AT_ 0xE67E; //CRC Lower byte
EXTERN xdata volatile BYTE UDMACRCQUAL _AT_ 0xE67F; //UDMA In only, host terminated use only
// Debug/Test
EXTERN xdata volatile BYTE DBUG _AT_ 0xE6F8; // Debug
EXTERN xdata volatile BYTE TESTCFG _AT_ 0xE6F9; // Test configuration
EXTERN xdata volatile BYTE USBTEST _AT_ 0xE6FA; // USB Test Modes
EXTERN xdata volatile BYTE CT1 _AT_ 0xE6FB; // Chirp Test--Override
EXTERN xdata volatile BYTE CT2 _AT_ 0xE6FC; // Chirp Test--FSM
EXTERN xdata volatile BYTE CT3 _AT_ 0xE6FD; // Chirp Test--Control Signals
EXTERN xdata volatile BYTE CT4 _AT_ 0xE6FE; // Chirp Test--Inputs
// Endpoint Buffers
EXTERN xdata volatile BYTE EP0BUF[64] _AT_ 0xE740; // EP0 IN-OUT buffer
EXTERN xdata volatile BYTE EP1OUTBUF[64] _AT_ 0xE780; // EP1-OUT buffer
EXTERN xdata volatile BYTE EP1INBUF[64] _AT_ 0xE7C0; // EP1-IN buffer
EXTERN xdata volatile BYTE EP2FIFOBUF[1024] _AT_ 0xF000; // 512/1024-byte EP2 buffer (IN or OUT)
EXTERN xdata volatile BYTE EP4FIFOBUF[1024] _AT_ 0xF400; // 512 byte EP4 buffer (IN or OUT)
EXTERN xdata volatile BYTE EP6FIFOBUF[1024] _AT_ 0xF800; // 512/1024-byte EP6 buffer (IN or OUT)
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