SH7706 Datasheet, PDF (29/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

12.5.1 Status Flag Set Timing......................................................................................... 337
12.5.2 Status Flag Clear Timing ..................................................................................... 337
12.5.3 Interrupt Sources and Priorities............................................................................ 338
12.6 Usage Note........................................................................................................................ 338
12.6.1 Writing to Registers ............................................................................................. 338
12.6.2 Reading Registers ................................................................................................ 338
Section 13 Realtime Clock (RTC).................................................................................. 339
13.1 Feature .............................................................................................................................. 339
13.2 Input/Output Pin................................................................................................................ 341
13.3 Register Description.......................................................................................................... 341
13.3.1 64-Hz Counter (R64CNT) ................................................................................... 342
13.3.2 Second Counter (RSECCNT) .............................................................................. 343
13.3.3 Minute Counter (RMINCNT) .............................................................................. 343
13.3.4 Hour Counter (RHRCNT).................................................................................... 344
13.3.5 Day of the Week Counter (RWKCNT)................................................................ 344
13.3.6 Date Counter (RDAYCNT) ................................................................................. 345
13.3.7 Month Counter (RMONCNT) ............................................................................. 346
13.3.8 Year Counter (RYRCNT) .................................................................................... 346
13.3.9 Second Alarm Register (RSECAR) ..................................................................... 347
13.3.10 Minute Alarm Register (RMINAR) ..................................................................... 347
13.3.11 Hour Alarm Register (RHRAR)........................................................................... 348
13.3.12 Day of the Week Alarm Register (RWKAR)....................................................... 349
13.3.13 Date Alarm Register (RDAYAR) ........................................................................ 350
13.3.14 Month Alarm Register (RMONAR) .................................................................... 351
13.3.15 RTC Control Register 1 (RCR1).......................................................................... 352
13.3.16 RTC Control Register 2 (RCR2).......................................................................... 354
13.4 RTC Operation.................................................................................................................. 356
13.4.1 Initial Settings of Registers after Power-On ........................................................ 356
13.4.2 Setting the Time................................................................................................... 356
13.4.3 Reading the Time................................................................................................. 358
13.4.4 Alarm Function .................................................................................................... 359
13.4.5 Crystal Oscillator Circuit ..................................................................................... 360
13.5 Usage Note........................................................................................................................ 361
13.5.1 Register Writing during RTC Count .................................................................... 361
13.5.2 Use of Realtime Clock (RTC) Periodic Interrupts ............................................... 361
13.5.3 Timing for Setting ADJ Bit in RCR2................................................................... 362
Section 14 Serial Communication Interface (SCI) .................................................... 363
14.1 Feature .............................................................................................................................. 363
14.2 Input/Output Pin................................................................................................................ 367
Rev. 5.00 May 29, 2006 page xxix of xlviii