SH7708 Datasheet, PDF (11/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

11.3.2 Basic Functions......................................................................................308
11.4 Interrupts......................................................................................................... .312
11.4.1 Status Flag Set Timing ...........................................................................312
11.4.2 Status Flag Clear Timing.........................................................................313
11.4.3 Interrupt Sources and Priorities..................................................................313
11.5 Usage Notes......................................................................................................314
11.5.1 Writing to Registers................................................................................314
11.5.2 Reading Registers ...................................................................................314
11.5.3 Clearing UNF in the TCR Register............................................................314
Section 12 Realtime Clock (RTC) .................................................... 315
12.1 Overview..........................................................................................................315
12.1.1 Features................................................................................................315
12.1.2 Block Diagram .......................................................................................315
12.1.3 Pin Configuration...................................................................................317
12.1.4 RTC Register Configuration.....................................................................318
12.2 RTC Registers...................................................................................................318
12.2.1 64-Hz Counter (R64CNT)........................................................................318
12.2.2 Second Counter (RSECCNT)....................................................................319
12.2.3 Minute Counter (RMINCNT) ...................................................................319
12.2.4 Hour Counter (RHRCNT)........................................................................320
12.2.5 Day of the Week Counter (RWKCNT)........................................................320
12.2.6 Date Counter (RDAYCNT) ......................................................................321
12.2.7 Month Counter (RMONCNT)...................................................................322
12.2.8 Year Counter (RYRCNT).........................................................................322
12.2.9 Second Alarm Register (RSECAR) ............................................................323
12.2.10 Minute Alarm Register (RMINAR)..........................................................323
12.2.11 Hour Alarm Register (RHRAR)...............................................................324
12.2.12 Day of the Week Alarm Register (RWKAR) ..............................................324
12.2.13 Date Alarm Register (RDAYAR) .............................................................325
12.2.14 Month Alarm Register (RMONAR) .........................................................326
12.2.15 RTC Control Register 1 (RCR1) .............................................................326
12.2.16 RTC Control Register 2 (RCR2) .............................................................328
12.3 RTC Operation..................................................................................................329
12.3.1 Initial Settings of Registers after Power-On.................................................329
12.3.2 Setting the Time ....................................................................................329
12.3.3 Reading the Time ...................................................................................331
12.3.4 Alarm Function......................................................................................332
12.3.5 Crystal Oscillator Circuit.........................................................................333
12.4 Usage Notes..................................................................................................... .334
12.4.1 Flag Clearing.........................................................................................334
Section 13 Serial Communication Interface (SCI).................................. 335
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