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Chapter 6. Power Management Page 6-3
6.2 USB Suspend
Figure 6-2. USB Suspend sequence
A USB device recognizes a SUSPEND request as three milliseconds of the bus-idle (“J”) state.
When the FX2 detects this condition, it asserts the USB interrupt (INT2) and the SUSPEND inter-
rupt autovector (vector #3).
If the CPU is in reset when a SUSPEND condition is detected on the bus, the FX2 will automati-
cally turn off its oscillators (and keep the CPU in reset) until an enabled wakeup source is
asserted.
The bus-idle (“J”) state is
not
equivalent to the disconnected-from-USB state; the “J” state means
that the voltage on D+ is higher than that on D-.
PLL
Oscillator
divider
8051
CLKOUT
24 MHz
PCON.0
STOP
USB
"SUSPEND"
Interrupt
No USB activity
for 3 msec.
Signal
Resume
(USBCS.0)
Write any value to
SUSPEND register
(0xE681)
- EZ-USB FX2 1
- Technical Reference 1
- Cypress Disclaimer Agreement 2
- List of Trademarks 2
- Table of Contents 3
- Chapter 4. Interrupts 4
- Chapter 5. Memory 5
- Chapter 6. Power Management 5
- Chapter 7. Resets 5
- Chapter 9. Slave FIFOs 6
- Chapter 11. CPU Introduction 8
- Chapter 12. Instruction Set 9
- Chapter 13. Input/Output 9
- (Table of Contents) 10
- Chapter 15. Registers 10
- Appendix A 12
- Appendix B 12
- Appendix C 12
- List of Figures 13
- (List of Figures) 14
- List of Tables 21
- (List of Tables) 22
- 1.1 Introduction 27
- 1.2 An Introduction to USB 27
- 1.3 The USB Specification 28
- 1.4 Host Is Master 29
- 1.5 USB Direction 29
- 1.6 Tokens and PIDs 29
- 1.7 USB Frames 31
- 1.8 USB Transfer Types 32
- 1.8.3 Isochronous Transfers 33
- 1.8.4 Control Transfers 33
- 1.9 Enumeration 34
- Interface 35
- 1.11 ReNumeration™ 36
- 1.13 FX2 Feature Summary 39
- 1.15 FX2 Block Diagram 41
- 1.16 Packages 42
- 1.16.2 100-Pin Package 43
- 1.16.3 128-Pin Package 43
- GPIF Master 45
- Slave FIFO 45
- CY7C68013 46
- 128-pin TQFP 46
- 100-pin TQFP 47
- 56-pin SSOP 48
- 1.18 FX2 Endpoint Buffers 49
- Characteristic Choices 50
- Direction IN, OUT 50
- 1.19 External FIFO Interface 51
- FD[15:0] 53
- Chapter 2 Endpoint Zero 55
- 2.2 Control Endpoint EP0 56
- SETUP Stage 57
- SETUPDAT 57
- Initialization 58
- Data transfer 58
- Interrupt Control 58
- DAT. The Field column 59
- 2.3.2 Set Feature 64
- 2.3.3 Clear Feature 65
- 2.3.4 Get Descriptor 66
- DATA Stage 67
- STATUS Stage 67
- 2.3.5 Set Descriptor 71
- 2.3.5.1 Set Configuration 74
- 2.3.6 Get Configuration 74
- 2.3.7 Set Interface 75
- 2.3.8 Get Interface 76
- 2.3.9 Set Address 76
- 2.3.10 Sync Frame 77
- 2.3.11 Firmware Load 78
- 3.1 Introduction 79
- 3.2 FX2 Startup Modes 79
- 3.3 The Default USB Device 81
- USB Disconnect 86
- I²C-compatible bus speed 86
- 3.6 The RENUM Bit 87
- 3.10 Multiple ReNumerations™ 90
- Chapter 4 Interrupts 91
- 4.2 SFRs 92
- 4.3 Interrupt Processing 96
- 4.3.1.1 Interrupt Priorities 97
- 4.4 USB-Specific Interrupts 98
- 4.4.2 USB Interrupts 99
- USB Interrupt 100
- Interrupt 102
- 4.4.2.5 HISPEED Interrupt 103
- 4.4.2.6 EP0ACK Interrupt 103
- 4.4.2.2 SOF Interrupt 103
- 4.4.2.3 Suspend Interrupt 103
- 4.4.2.4 USB RESET Interrupt 103
- 4.4.2.7 Endpoint Interrupts 104
- 4.4.2.9 EPxPING Interrupt 104
- 4.4.2.10 ERRLIMIT Interrupt 105
- 4.4.2.11 EPxISOERR Interrupt 105
- Instruction 106
- D7 D6 D5 D4 D3 D2 D1 D0 108
- Address Op-Code Hex Value 110
- 0x0053 LJMP 0x02 110
- 0x0054 AddrH 0xHH 110
- 0x0055 AddrL 0xLL 110
- Chapter 5 Memory 113
- 5.2.1 The Lower 128 114
- 5.2.2 The Upper 128 114
- Standard 8051 115
- 5.3.1 56- and 100-pin FX2 116
- 5.3.2 128-pin FX2 116
- 5.4 FX2 Memory Maps 117
- Inside FX2 Outside FX2 119
- Chapter 5. Memory Page 5-9 121
- Chapter 6 Power Management 123
- USB RESUME 124
- WAKEUP pin 124
- 6.2 USB Suspend 125
- 6.3 Wakeup/Resume 126
- 6.3.1 Wakeup Interrupt 127
- 6.4.1 WU2 Pin 128
- Chapter 7 Resets 131
- 7.2 Power-On Reset (POR) 132
- 7.3 Releasing the CPU Reset 133
- 7.4 CPU Reset Effects 134
- 7.5 USB Bus Reset 134
- 7.6 FX2 Disconnect 135
- 7.7 Reset Summary 135
- 8.1 Introduction 137
- 8.6.1.1 EP0CS 141
- 8.6.1.2 EP0BCH and EP0BCL 143
- 8.6.1.3 USBIE, USBIRQ 143
- 8.6.1.4 EP01STAT 144
- 8.6.1.5 EP1OUTCS 144
- 8.6.1.6 EP1OUTBC 145
- 8.6.1.7 EP1INCS 145
- 8.6.1.8 EP1INBC 145
- 8.6.2.1 EP2468STAT 146
- 0 0 Invalid 147
- 8.6.3.2 EPIE, EPIRQ 151
- 8.6.3.4 TOGCTL 152
- 8.7 The Setup Data Pointer 153
- 0xE6B3 SUDPTRH High address 154
- 0xE6B4 SUDPTRL Low address 154
- 0xE6B5 SUDPTRCTL SDPAUTO bit 154
- 8.8 Autopointers 155
- Chapter 9 Slave FIFOs 157
- 9.2 Hardware 158
- Read — SLOE and SLRD: 164
- Write — SLWR: 164
- FIFOADR[1:0]: 164
- PKTEND: 165
- 9.3 Firmware 175
- 9.3.2 EPx Memories 176
- AUTOOUT=1 178
- 10.1 Introduction 191
- 10.2 Hardware 195
- 10.2.4 Six Ready IN signals 197
- 10.3.1 The GPIF Registers 202
- 10.3.2.1 The GPIF IDLE State 202
- 10.3.2.2 Defining States 204
- 10.3.4 State Instructions 211
- 10.4 Firmware 216
- 10.4.3.1 Transaction Counter 231
- 10.4.4 GPIF Flag Selection 232
- 10.4.5 GPIF Flag Stop 232
- 10.5 UDMA Interface 253
- Chapter 11 CPU Introduction 255
- 11.2 8051 Enhancements 256
- 11.3 Performance Overview 257
- 11.4 Software Compatibility 258
- 11.6 FX2/DS80C320 Differences 259
- 11.6.6 Port I/O 260
- 11.6.7 Interrupts 260
- 11.6.4 Watchdog Timer 260
- 11.6.5 Power Fail Detection 260
- 11.8 EZ-USB FX2 Internal RAM 261
- 11.9 I/O Ports 262
- 11.10Interrupts 263
- 11.11 Power Control 263
- 11.14Reset 265
- Chapter 12 Instruction Set 267
- 12.1.1 Instruction Timing 271
- 12.1.3 Dual Data Pointers 273
- Table 12-2 274
- Chapter 13 Input/Output 275
- IOE Port E SFR 0xB1 278
- PORTCCFG 283
- (0xE671) 283
- Bits") 286
- 13.4.2 Registers 287
- 0 0 0 0 0 0 STOPE 400KHZ 288
- 13.4.2.2 Status Bits 289
- ID1, ID0 290
- 13.4.3 Sending Data 290
- 13.4.4 Receiving Data 290
- 13.5 EEPROM Boot Loader 291
- 0 0 No EEPROM detected 292
- 1 1 Not used 292
- 14.1 Introduction 293
- 14.2 Timers/Counters 293
- 14.2.2 Timers 0 and 1 294
- 14.2.3 Timer Rate Control 299
- 14.2.4 Timer 2 300
- 14.3 Serial Interface 304
- 14.3.3 Mode 0 307
- D0 D1 D2 D3 D4 D5 D6 D7 310
- D1 D2 D3 D4 D5 D6 D7 310
- 14.3.4 Mode 1 312
- 14.3.4.1 Mode 1 Baud Rate 312
- 14.3.4.2 Mode 1 Transmit 314
- 14.3.5 Mode 1 Receive 314
- 14.3.6 Mode 2 316
- 14.3.6.1 Mode 2 Transmit 316
- 14.3.6.2 Mode 2 Receive 317
- 14.3.7 Mode 3 318
- Chapter 15 Registers 321
- 15.1.2 Other Conventions 322
- 15.3 About SFRS 324
- R R R R R R R R 327
- 0 1 0 1 1 0 1 0 327
- SFR 0xBF 332
- and WR strobes 333
- Bit 1 CLKOE Drive CLKOUT Pin 334
- 0 30 MHz 335
- 1 48 MHz(default) 335
- Bit 3-0 EP3:0 Endpoint 340
- Bit 3 Break Enable Breakpoint 340
- Bit 1 BPEN Breakpoint Enable 341
- Bit 5 PKTEND 342
- Bit 3 SLRD FIFO Read Polarity 343
- Bit 1 EF Empty Flag Polarity 343
- Bit 0 FF Full Flag Polarity 343
- 15.5.9 Chip Revision Control 344
- Chip Revision Control E60B 344
- 15.5.10 GPIF Hold Time 345
- GPIFHOLDTIME E60C 345
- 15.6 Endpoint Configuration 346
- VALID DIR TYPE1 TYPE0 0 0 0 0 347
- Bit 6 INFM1 IN Full Minus One 349
- Bit 5 OEP1 OUT Empty Plus One 349
- 0 0 0 0 0 0 0 0 352
- Bit 1-0 PFC9:8 PF Threshold 355
- Bit 7 DECIS PF Polarity 357
- Bit 6 PKSTAT Packet Status 357
- Bit 0 PFC8 PF Threshold 357
- Bit 7-0 PFC7:0 PF Threshold 358
- 15.6.5.1 IN Endpoints 359
- 15.6.5.2 OUT Endpoints 360
- Bit 7 SKIP Skip Packet 362
- Bit 3-0 EP3:0 Endpoint Number 362
- Bit 2 PF Programmable Flag 363
- Bit 1 EF Empty Flag 364
- Bit 0 FF Full Flag 364
- EP8 EP6 EP4 EP2 EP1 EP0 0 IBN 366
- 0 0 0 0 0 0 GPIFWF GPIFDONE 370
- Bit 0 ERRLIMIT Error Limit 371
- Bit 7-4 EC3:0 USB Error Count 372
- 1 0 I4V3 I4V2 I4V1 I4V0 0 0 373
- Bit 1 INT4SRC INT 4 Source 374
- Bit 6 SLCS SLCS 375
- Alternate Configuration 375
- Bit 6 T2EX Timer 2 Counter 376
- I2CS I²C-Compatible Bus 377
- Control and Status 377
- Bit 5 LASTRD Last Data Read 378
- Bit 4-3 ID1:0 Boot EEPROM ID 378
- Bit 2 BERR Bus Error 378
- Bit 1 ACK Acknowledge Bit 378
- Bit 0 DONE Transfer DONE 378
- Bit 7-0 Data Data Bits 379
- Bit 7-0 Data AUTODATAx 380
- 15.9 UDMA CRC Registers 381
- Bit 7 QENABLE 382
- Bit 3 QSTATE 382
- Bits 2-0 QSIGNAL[2:0] 382
- Bit 7 HSM High Speed Mode 383
- Bit 1 RENUM Renumerate 383
- Regardless of Bus State 384
- 15.10.4 Data Toggle Control 385
- Bit 3-0 EP3:0 Select Endpoint 386
- 15.10.6 USB Frame Count Low 387
- 15.10.7 USB Microframe Count 387
- 15.11 Endpoints 388
- 0 BC6 BC5 BC4 BC3 BC2 BC1 BC0 389
- Bit 7-0 BC7:0 Byte Count 391
- Bit 7 HSNAK Hand Shake w/ NAK 391
- Bit 1 BUSY EP0 Buffer Busy 392
- Bit 0 STALL EP0 Stalled 392
- Bit 3 FULL Endpoint FIFO Full 394
- Bit 0 STALL ENDPOINT STALL 394
- R R R R R R R R/W 395
- 0 0 0 0 0 1 0 0 395
- Bit 7-0 BC7:0 Byte Count High 399
- Bit 15-0 A15:0 400
- 0 0 0 0 0 0 0 SDPAUTO 401
- DONE 0 0 0 0 0 0 IDLEDRV 403
- 15.12.3 CTL Outputs 404
- 0 1 Open-Drain Open-Drain 405
- 15.12.4 GPIF Address High 406
- GPIFADRH 406
- GPIF Address High E6C4 406
- 15.12.5 GPIF Address Low 407
- GPIFADRL 407
- GPIF Address Low E6C5 407
- FLOWSTATE E6C6 407
- FLOWLOGIC E6C7 408
- Bits 2-0 TERMB[2:0] 409
- Bit 7 SLAVE 411
- Bit 6 RDYASYNC 412
- Bit 5 CTLTOGL 412
- Bit 4 SUSTAIN 412
- Bit 2-0 MSTB[2:0] 412
- Bits 7-4 HOPERIOD[3:0] 413
- Bit 3 HOSTATE 413
- Bits 2-0 HOCTL[2:0] 413
- Bit 1 FALLING 413
- Bit 0 RISING 413
- FLOWSTBHPERIOD E6CD 414
- GPIFTCB3 415
- GPIFTCB2 415
- GPIFTCB1 416
- GPIFTCB0 416
- FS1 FS0 Flag 417
- Bit 7-0 D15:8 GPIF Data High 419
- INTRDY SAS TCXRDY5 0 0 0 0 0 420
- 15.12.15 GPIF RDY Pin Status 421
- 15.12.16 Abort GPIF Cycles 421
- GPIFABORT Abort GPIF E6F5 421
- Bit 7-0 D7:0 EP0 Data 422
- Bit 7-0 D7:0 EP1-Out Data 422
- Bit 7-0 D7:0 EP1-IN Buffer 423
- Bit 7-0 D7:0 EP2 Data 423
- Bit 7-0 D7:0 EP4 Data 424
- Bit 7-0 D7:0 EP6 Data 424
- Bit 7-0 D7:0 EP8 Data 425
- n means “round n upward” 426
- Table A-2 Device Qualifier 428
- Field Description Value 428
- Register Summary 449
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