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Intel® PXA26x Processor Family Developer’s Manual 6-69
Memory Controller
Figure 6-29. Alternate Bus Master Mode
Figure 6-30. Variable Latency IO
PXA26x Processor Family
EXTERNAL SYSTEM
MBREQ
MBGNT
GPIO<13> (MBGNT)
GPIO<14> (MBREQ)
nSDCS(0)
nWE
nSDRAS
nSDCAS
MD[31:0]
MA[25:0]
SDCLK<1>
DQM[3:0]
SDCKE<1>
Memory
Controller
External
SDRAM
Bank 0
Companion
Chip
GPIO
Block
PXA26x Processor Family
EXTERNAL SYSTEM
nCS(0,1,2,3,4,5)
nPWE
nOE
RDY
MD[31:0]
MA[25:0]
DQM[3:0]
Companion
Chip
Memory
Controller
- Developer’s Manual 1
- Contents 2
- Revision History 23
- Introduction 1 25
- 1.2.1 Memory Controller 26
- 1.2.22 Hardware UART (HWUART) 30
- System Architecture 2 31
- 2.2 Package Types 32
- Management 34
- 2.4 Input/Output Ordering 35
- 2.5 Semaphores 36
- 2.6 Interrupts 36
- 2.7 Reset 37
- 2.8 Internal Registers 37
- 2.11 Power Management 38
- 2.12 Pin List 39
- System Architecture 40
- 2.13 Register Address Summary 51
- 2.14 Memory Map 63
- Clocks and Power Manager 3 67
- 3.3 Clock Manager 68
- 3.3.1 32.768-KHz Oscillator 70
- 3.3.2 3.6864-MHz Oscillator 70
- 3.3.3 Core Phase Locked Loop 70
- 3.4 Resets and Power Modes 72
- 3.4.1 Hardware Reset 73
- 3.4.2 Watchdog Reset 73
- 3.4.3 GPIO Reset 74
- 3.4.4 Run Mode 75
- 3.4.5 Turbo Mode 75
- 3.4.6 Idle Mode 76
- 3.4.7 33-MHz Idle Mode 78
- 3.4.9 Sleep Mode 81
- 3.4.9.3 Entering Sleep Mode 83
- 3.4.9.5 Exiting Sleep Mode 85
- 3.4.10 Power Mode Summary 86
- 3.5 Power Manager Registers 88
- PGSR1, PGSR2) 97
- • GPIO reset 99
- • Sleep mode 99
- • Watchdog reset 99
- • Hardware reset 99
- Clocks and Power Manager 100
- 3.6 Clocks Manager Registers 101
- Oscillator 108
- System Integration Unit 4 109
- System Integration Unit 112
- 4.2 Interrupt Controller 130
- Register (ICFP) 134
- 4.3 Real-Time Clock (RTC) 140
- 4.3.3 Trim Procedure 143
- 4.4 Operating System Timer 146
- OSMR2, OSMR3) 147
- 4.5 Pulse Width Modulator 151
- 4.5.2 Register Descriptions 152
- PWM_DUTYn = 6 155
- PWM_PERVALn = 10 (+1) 155
- 4.5.4 Register Summary 156
- DMA Controller 160
- (external) 160
- (internal) 160
- Memory Controller 160
- 5.1.2 Signal Descriptions 161
- • Set zero 163
- • Set three 163
- 5.1.4.2 Descriptor Fetch Mode 165
- (running) 166
- 5.1.5 Channel States 167
- 5.1.6 Read and Write Order 167
- 5.2 Transferring Data 169
- • DCMD[INCTRGADDR] = 1 171
- • DCMD[FLOWSRC] = 1 171
- • DCMD[FLOWTRG] = 0 171
- 5.2.4 Memory-to-Memory Moves 174
- 5.3.1 DMA Interrupt Register 175
- 5.3.7 DMA Command Registers 181
- 5.4 Examples 183
- Locations 186
- Memory Controller 6 191
- 6.2 Functional Description 192
- 6.3 Memory System Examples 194
- 6.4 Memory Accesses 196
- 6.4.1 Reads and Writes 197
- 6.6.1 SDRAM MDCNFG Register 199
- 6.6.3 SDRAM MDREFR Register 204
- Refer to Table 6-6 205
- 6.6.4 SDRAM Memory Options 207
- 6.6.5 SDRAM Command Overview 215
- • Power-Down (PWRDN) 216
- • Enter Self-Refresh (SLFRSH) 216
- • Exit Power-Down (PWRDNX) 216
- • No Operation (NOP) 216
- Figure 6-5. SDRAM Read 217
- Figure 6-9. SDRAM Write 219
- 6.7.1.1 SMROM Memory Options 225
- Configuration Register 226
- CL = 5CL = 5RL = 2RL = 2 228
- 6.8.1 Static Memory Interface 231
- 6.8.3 ROM Interface 238
- MSC0:RDN = 1, MSC0:RRR = 1) 239
- MSC0:RDN = 1, MSC0:RRR = 0) 240
- 6.8.4 SRAM Interface Overview 241
- 6.8.6 FLASH Memory Interface 246
- 6.9.3 16-Bit PC Card Overview 251
- 0ns 50ns 100ns 150ns 257
- 6.10 Companion Chip Interface 258
- 6.10.1.1 GPIO Reset 261
- 6.11.1 Alternate Booting 262
- 6.11.2 Boot Time Defaults 262
- 7.1 Overview 269
- 7.1.1 Features 270
- 7.1.2 Pin Descriptions 272
- 7.2.1 Enabling the Controller 272
- 7.3.1 Input FIFOs 274
- 7.3.2 Lookup Palette 274
- 7.3.4 Output FIFOs 277
- 7.3.6 Direct Memory Access 278
- 7.4.1 External-Palette Buffer 279
- 7.4.2 External-Frame Buffer 280
- • 32 pixels for 1-bit pixels 282
- • 16 pixels for 2-bit pixels 282
- • 8 pixels for 4-bit pixels 282
- • 4 pixels for 8-bit pixels 282
- • 2 pixels for 16-bit pixels 282
- 7.5 Functional Timing 283
- PPL = 319 284
- Line 239 Data Line 0 Data 285
- ENB set to 1 286
- PCP - Pixel Clock Polarity 287
- • DMA bus errors 288
- 7.6.1.2 Branch Mask (BM) 290
- 7.6.1.5 LCD Disable (DIS) 291
- 7.6.1.14 LCD Enable (ENB) 296
- 7.6.2.4 Pixels Per Line (PPL) 298
- 7.6.3.4 Lines Per Panel (LPP) 301
- 7.6.4.2 Bits Per Pixel (BPP) 302
- 7.6.5 LCD Controller DMA 305
- 7.6.5.1 Frame Descriptors 306
- Reserved 307
- 7.6.5.5.1 Load Palette (PAL) 308
- 7.6.7.2 Branch Status (BS) 312
- 7.6.9 TMED RGB Seed Register 314
- Matrix (COAM) 317
- 8.1 Overview 319
- 8.2 Signal Description 319
- 8.3 Functional Description 320
- 8.4 Data Formats 320
- 8.4.1.2 SPI Format Details 322
- 8.6 Baud Rate Generation 325
- 8.7 SSP Serial Port Registers 325
- 8.7.1.2 Frame Format (FRF) 328
- 8.7.2.3 Loop Back Mode (LBM) 330
- Min Max Min Max 333
- 8 Bytes 0 11 3 15 333
- 16 Bytes 0 7 7 15 333
- 8.7.4.7 Transmit FIFO Level 337
- 8.7.4.8 Receive FIFO Level 337
- 9.1 Overview 339
- 9.2 Signal Description 339
- 9.3 Functional Description 339
- 9.3.1 Operational Blocks 341
- 9.3.3.1 START Condition 343
- 9.3.3.3 STOP Condition 344
- 9.4.4 Arbitration 347
- 9.4.4.2 SDA Arbitration 348
- 9.4.5 Master Operations 349
- 9.4.6 Slave Operations 353
- 9.4.7 General Call Address 354
- • Sets the ISR[GCAD] bit 355
- • Sets the ISR[SAD] bit 355
- 9.5.1 Initialize Unit 356
- 9.5.3 Read n Bytes as a Slave 357
- 9.6.1 Initialize Unit 357
- 9.6.3 Read 1 Byte as a Master 358
- 9.7 Glitch Suppression Logic 360
- 9.8 Reset Conditions 360
- 9.9 Register Definitions 360
- C Data Buffer Register- IDBR 361
- C Control Register- ICR 362
- for the following I 363
- Table 9-11. I 363
- C Status Register 364
- Table 9-12. I 365
- Transmitter 10 367
- 10.2 Overview 368
- 10.3 Signal Descriptions 369
- 10.4.1 Reset 371
- – IER (Sheet 1 of 2) 375
- – IER (Sheet 2 of 2) 376
- – LCR (Sheet 1 of 2) 380
- – LCR (Sheet 2 of 2) 381
- – LSR (Sheet 1 of 2) 382
- – LSR (Sheet 2 of 2) 383
- – MCR (Sheet 1 of 2) 384
- – MCR (Sheet 2 of 2) 385
- 10.4.5 DMA Requests 388
- 10.4.6.2 Operation 390
- 10.5 Register Summary 392
- 11.1 Signal Description 395
- 11.2.2 Frame Format 397
- 11.2.3 Address Field 398
- 11.2.4 Control Field 398
- 11.2.5 Data Field 398
- 11.2.6 CRC Field 398
- 11.2.7 Baud Rate Generation 399
- 11.2.8 Receive Operation 399
- 11.2.9 Transmit Operation 400
- Descriptions 402
- 11.3.4 FICP Data Register 406
- 11.3.5 FICP Status Register 0 407
- 11.3.6 FICP Status Register 1 408
- Universal Serial Bus Device 411
- Controller 12 411
- 12.2 Device Configuration 412
- 12.3.1 Signalling Levels 413
- 12.3.2 Bit Encoding 414
- 12.3.3 Field Formats 414
- 12.3.4 Packet Formats 415
- 12.3.4.3 Data Packet Type 416
- 12.3.5 Transaction Formats 417
- 12.3.6 UDC Device Requests 418
- 12.4 UDC Hardware Connection 420
- (optional) 421
- 12.5 UDC Operation 422
- Status Stage 424
- 12.5.7.1 Software Enables DMA 427
- 12.6.1 UDC Control Register 432
- 12, or 14 455
- AC97 Controller Unit 13 463
- 13.3 Signal Description 464
- OUTGOING STREAMS 466
- INCOMING STREAMS 466
- Data PhaseTag Phase 466
- SDATA_OUT 467
- 13.4.1.1 Slot 0: Tag Phase 468
- 13.4.1.7 Slots 6-11: Reserved 470
- 13.4.1.8 Slot 12: I/O Control 470
- 13.4.2.1 Slot 0: Tag Phase 471
- Bit Name Description 473
- 13.5 AC-link Low Power Mode 474
- 13.5.2 Waking up the AC-link 475
- 13.6 ACUNIT Operation 476
- 13.6.1 Initialization 477
- 13.6.2 Trailing bytes 478
- 13.8 Functional Description 479
- 13.8.2 Interrupts 480
- 13.8.3 Registers 480
- • Audio codec registers 481
- • Modem codec registers 481
- AC97 Controller Unit 482
- Controller 14 497
- 14.2 Signal Descriptions 498
- 14.3 Controller Operation 499
- 14.3.4 Transmit FIFO Errors 501
- 14.3.5 Receive FIFO Errors 501
- 14.3.6 Trailing Bytes 501
- 14.5 Data Formats 502
- A8842-01 503
- A8843-01 503
- • Setting ENB to one does: 504
- 14.7 Interrupts 512
- MultiMediaCard Controller 15 513
- 15.2.1 Signal Description 516
- 15.2.4 MMC and SPI Modes 517
- 15.2.4.2 SPI Mode 518
- 15.2.5 Error Detection 519
- 15.2.6 Interrupts 519
- 15.2.7 Clock Control 519
- 15.2.8 Data FIFOs 520
- • Receive 96 bytes of data: 521
- • Receive 98 bytes of data: 521
- • Receive 105 bytes: 521
- • Transmit 96 bytes of data: 522
- • Transmit 98 bytes of data: 522
- • Transmit 105 bytes: 523
- 15.2.8.4 DMA and Program I/O 523
- 15.3.2 Data Transfer 524
- 15.3.2.1 Block Data Write 525
- 15.3.2.2 Block Data Read 525
- Time-out Delay 526
- MMC_RDTO[READ_TO] 526
- 15.3.3 Busy Sequence 527
- 15.3.4 SPI Functionality 527
- 15.4.1 Start and Stop Clock 528
- 15.4.2 Initialize 528
- 15.4.3 Enabling SPI Mode 528
- 15.4.5 Erase 529
- 15.4.7 Single Block Read 530
- 15.4.8 Multiple Block Write 530
- 15.4.9 Multiple Block Read 531
- 15.4.10 Stream Write 531
- 15.4.11 Stream Read 532
- 15.5.1 MMC_STRPCL Register 533
- 15.5.2 MMC_STAT Register 534
- 15.5.3 MMC_CLKRT Register 535
- 15.5.4 MMC_SPI Register 536
- 15.5.5 MMC_CMDAT Register 537
- 15.5.6 MMC_RESTO Register 538
- 15.5.7 MMC_RDTO Register 539
- 15.5.8 MMC_BLKLEN Register 540
- 15.5.9 MMC_NOB Register 540
- 15.5.10 MMC_PRTBUF Register 540
- 15.5.11 MMC_I_MASK Register 541
- 15.5.12 MMC_I_REG Register 542
- 15.5.13 MMC_CMD Register 543
- MultiMediaCard Controller 544
- Table 15-18. MMC_CMD Register 544
- 15.5.14 MMC_ARGH Register 546
- 15.5.15 MMC_ARGL Register 546
- 15.5.18 MMC_TXFIFO FIFO 547
- Protocol Serial Ports 16 549
- 16.3 Signal Description 550
- 16.4 Operation 550
- 16.4.2.1 Time-out 551
- 16.4.3 Data Formats 552
- A9650-01 554
- A9518-02 554
- A9651-01 555
- A9519-02 555
- A9652-01 556
- A9520-02 557
- A9653-01 558
- A9521-02 558
- A9523-02 559
- T1 T2 T3 T4 560
- 16.4.4 Hi-Z on SSPTXD 561
- A9975-01 562
- MSB 4 to 32 Bits LSB 562
- Bit[N] Bit[N-1] Bit[1] Bit[0] 562
- A9976-01 562
- A9977-01 563
- A9978-01 563
- 16.4.5 FIFO Operation 565
- 16.4.6 Baud-Rate Generation 565
- Table 16-4 569
- (Start Delay) 575
- + (Dummy start) 575
- + (Data size) 575
- + (Dummy Stop) 575
- SSTO Bit Definitions 577
- 16.6 Register Summary 582
- Hardware UART 17 585
- 17.2 Features 586
- 17.3 Signal Descriptions 587
- 17.4 Operation 587
- 17.4.1 Reset 589
- 17.4.3 Autoflow Control 591
- can be programmed by the 592
- 17.4.5.1 Operation 593
- (see Table 17-2) 594
- Settings 595
- Hardware UART 616
- Internal Flash 18 617
- Software 618
- 18.1.4 SXCNFG Configuration 618
- Internal Flash 620
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