13.2.11 Refresh Timer Control/Status Register (RTCSR) ................................................ 364
13.2.12 Refresh Timer Counter (RTCNT) ........................................................................ 367
13.2.13 Refresh Time Constant Register (RTCOR).......................................................... 368
13.2.14 Refresh Count Register (RFCR)........................................................................... 369
13.2.15 Notes on Accessing Refresh Control Registers.................................................... 369
13.3 Operation........................................................................................................................... 370
13.3.1 Endian/Access Size and Data Alignment............................................................. 370
13.3.2 Areas .................................................................................................................... 382
13.3.3 SRAM Interface ................................................................................................... 387
13.3.4 DRAM Interface................................................................................................... 395
13.3.5 Synchronous DRAM Interface............................................................................. 413
13.3.6 Burst ROM Interface............................................................................................ 441
13.3.7 PCMCIA Interface ............................................................................................... 444
13.3.8 MPX Interface...................................................................................................... 455
13.3.9 Byte Control SRAM Interface.............................................................................. 473
13.3.10 Waits between Access Cycles .............................................................................. 478
13.3.11 Bus Arbitration..................................................................................................... 480
13.3.12 Master Mode ........................................................................................................ 483
13.3.13 Slave Mode........................................................................................................... 484
13.3.14 Partial-Sharing Master Mode ............................................................................... 485
13.3.15 Cooperation between Master and Slave ............................................................... 486
13.3.16 Notes on Usage .................................................................................................... 487
Section 14 Direct Memory Access Controller (DMAC).......................................... 489
14.1 Overview........................................................................................................................... 489
14.1.1 Features ................................................................................................................ 489
14.1.2 Block Diagram (SH7750, SH7750S) ................................................................... 492
14.1.3 Pin Configuration (SH7750, SH7750S) ............................................................... 493
14.1.4 Register Configuration (SH7750, SH7750S) ....................................................... 494
14.2 Register Descriptions (SH7750, SH7750S)....................................................................... 496
14.2.1 DMA Source Address Registers 0–3 (SAR0–SAR3)........................................... 496
14.2.2 DMA Destination Address Registers 0–3 (DAR0–DAR3).................................. 497
14.2.3 DMA Transfer Count Registers 0–3 (DMATCR0–DMATCR3)......................... 498
14.2.4 DMA Channel Control Registers 0–3 (CHCR0–CHCR3) ................................... 499
14.2.5 DMA Operation Register (DMAOR)................................................................... 507
14.3 Operation........................................................................................................................... 510
14.3.1 DMA Transfer Procedure..................................................................................... 510
14.3.2 DMA Transfer Requests....................................................................................... 512
14.3.3 Channel Priorities................................................................................................. 515
14.3.4 Types of DMA Transfer....................................................................................... 518
14.3.5 Number of Bus Cycle States and '5(4 Pin Sampling Timing........................... 527
14.3.6 Ending DMA Transfer ......................................................................................... 541
14.4 Examples of Use................................................................................................................ 544
Rev. 6.0, 07/02, page xxviii of I
RENESAS [ RENESAS TECHNOLOGY CORP ]
