SH7205 Datasheet, PDF (19/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

13.5.2 Conflict between Word-Write and Count-Up Processes of CMCNT ................... 681
13.5.3 Conflict between Byte-Write and Count-Up Processes of CMCNT..................... 682
Section 14 Watchdog Timer (WDT)..................................................................683
14.1 Features.............................................................................................................................. 683
14.2 Input/Output Pin................................................................................................................. 685
14.3 Register Descriptions ......................................................................................................... 686
14.3.1 Watchdog Timer Counter (WTCNT0, WTCNT1)................................................ 686
14.3.2 Watchdog Timer Control/Status Register (WTCSR0, WTCSR1) ........................ 687
14.3.3 Watchdog Reset Control/Status Register (WRCSR0, WRCSR1)......................... 689
14.3.4 Notes on Register Access...................................................................................... 691
14.4 WDT Usage ....................................................................................................................... 693
14.4.1 Canceling Software Standby Mode....................................................................... 693
14.4.2 Changing the PLL Multiplication Ratio................................................................ 693
14.4.3 Using Watchdog Timer Mode .............................................................................. 693
14.4.4 Using Interval Timer Mode .................................................................................. 695
14.5 Usage Notes ....................................................................................................................... 696
14.5.1 Timer Variation..................................................................................................... 696
14.5.2 Prohibition against Setting H'FF to WTCNT........................................................ 696
14.5.3 Interval Timer Overflow Flag............................................................................... 696
14.5.4 System Reset by WDTOVF Signal....................................................................... 696
14.5.5 Manual Reset in Watchdog Timer Mode .............................................................. 697
14.5.6 Transition to Deep Standby Mode ........................................................................ 697
Section 15 Realtime Clock (RTC) .....................................................................699
15.1 Features.............................................................................................................................. 699
15.2 Input/Output Pin................................................................................................................. 701
15.3 Register Descriptions ......................................................................................................... 702
15.3.1 64-Hz Counter (R64CNT) .................................................................................... 703
15.3.2 Second Counter (RSECCNT) ............................................................................... 704
15.3.3 Minute Counter (RMINCNT) ............................................................................... 705
15.3.4 Hour Counter (RHRCNT)..................................................................................... 706
15.3.5 Day of Week Counter (RWKCNT) ...................................................................... 707
15.3.6 Date Counter (RDAYCNT) .................................................................................. 708
15.3.7 Month Counter (RMONCNT) .............................................................................. 709
15.3.8 Year Counter (RYRCNT) ..................................................................................... 710
15.3.9 Second Alarm Register (RSECAR) ...................................................................... 711
15.3.10 Minute Alarm Register (RMINAR)...................................................................... 712
15.3.11 Hour Alarm Register (RHRAR) ........................................................................... 713
15.3.12 Day of Week Alarm Register (RWKAR) ............................................................. 714
Rev. 1.00 Mar. 25, 2008 Page xix of xxxii