SH7712 Datasheet, PDF (19/978 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 13 Direct Memory Access Controller (DMAC) ...................................459
13.1 Features.............................................................................................................................. 459
13.2 Input/Output Pins ............................................................................................................... 461
13.3 Register Descriptions ......................................................................................................... 462
13.3.1 DMA Source Address Register (SAR) ................................................................. 463
13.3.2 DMA Destination Address Register (DAR) ......................................................... 463
13.3.3 DMA Transfer Count Register (DMATCR) ......................................................... 464
13.3.4 DMA Channel Control Register (CHCR) ............................................................. 464
13.3.5 DMA Operation Register (DMAOR) ................................................................... 469
13.3.6 DMA Extension Resource Selector 0 to 2 (DMARS0 to DMARS2) ................... 471
13.4 Operation ........................................................................................................................... 474
13.4.1 DMA Transfer Flow ............................................................................................. 474
13.4.2 DMA Transfer Requests ....................................................................................... 477
13.4.3 Channel Priority.................................................................................................... 479
13.4.4 DMA Transfer Types............................................................................................ 482
13.4.5 Number of Bus Cycle States and DREQ Pin Sampling Timing ........................... 489
13.5 Usage Note......................................................................................................................... 493
Section 14 Timer Unit (TMU) ...........................................................................495
14.1 Features.............................................................................................................................. 495
14.1.1 Block Diagram...................................................................................................... 495
14.2 Register Descriptions ......................................................................................................... 497
14.2.1 Timer Start Register (TSTR) ................................................................................ 497
14.2.2 Timer Control Registers (TCR) ............................................................................ 498
14.2.3 Timer Constant Registers (TCOR) ....................................................................... 499
14.2.4 Timer Counters (TCNT) ....................................................................................... 499
14.3 TMU Operation.................................................................................................................. 500
14.3.1 Counter Operation................................................................................................. 500
14.4 Interrupts............................................................................................................................ 503
14.4.1 Status Flag Set Timing.......................................................................................... 503
14.4.2 Status Flag Clear Timing ...................................................................................... 503
14.4.3 Interrupt Sources and Priorities ............................................................................ 504
14.5 Usage Notes ....................................................................................................................... 504
14.5.1 Writing to Registers .............................................................................................. 504
14.5.2 Reading Registers ................................................................................................. 504
Section 15 Realtime Clock (RTC) .....................................................................505
15.1 Feature ............................................................................................................................... 505
15.2 Input/Output Pins ............................................................................................................... 507
15.3 Register Descriptions ......................................................................................................... 507
Rev. 1.00 Dec. 27, 2005 Page xix of xlii