Datasheet

Rev. 3.00 Mar. 15, 2006 Page xiii of xxxii
9.9 Port B................................................................................................................................ 145
9.9.1 Port Data Register B (PDRB) ........................................................................... 145
Section 10 Realtime Clock (RTC).....................................................................147
10.1 Features............................................................................................................................. 147
10.2 Input/Output Pin ............................................................................................................... 148
10.3 Register Descriptions........................................................................................................ 148
10.3.1 Second Data Register/Free Running Counter Data Register (RSECDR) ......... 149
10.3.2 Minute Data Register (RMINDR)..................................................................... 150
10.3.3 Hour Data Register (RHRDR).......................................................................... 151
10.3.4 Day-of-Week Data Register (RWKDR) ........................................................... 152
10.3.5 RTC Control Register 1 (RTCCR1).................................................................. 153
10.3.6 RTC Control Register 2 (RTCCR2).................................................................. 155
10.3.7 Clock Source Select Register (RTCCSR)......................................................... 156
10.4 Operation .......................................................................................................................... 157
10.4.1 Initial Settings of Registers after Power-On ..................................................... 157
10.4.2 Initial Setting Procedure ...................................................................................157
10.4.3 Data Reading Procedure ...................................................................................158
10.5 Interrupt Sources...............................................................................................................159
Section 11 Timer B1..........................................................................................161
11.1 Features............................................................................................................................. 161
11.2 Input/Output Pin ............................................................................................................... 161
11.3 Register Descriptions........................................................................................................ 162
11.3.1 Timer Mode Register B1 (TMB1) .................................................................... 162
11.3.2 Timer Counter B1 (TCB1)................................................................................ 163
11.3.3 Timer Load Register B1 (TLB1) ...................................................................... 163
11.4 Operation .......................................................................................................................... 163
11.4.1 Interval Timer Operation .................................................................................. 163
11.4.2 Auto-Reload Timer Operation.......................................................................... 164
11.4.3 Event Counter Operation .................................................................................. 164
11.5 Timer B1 Operating Modes .............................................................................................. 164
Section 12 Timer V............................................................................................165
12.1 Features............................................................................................................................. 165
12.2 Input/Output Pins.............................................................................................................. 167
12.3 Register Descriptions........................................................................................................ 167
12.3.1 Timer Counter V (TCNTV).............................................................................. 167
12.3.2 Time Constant Registers A, B (TCORA, TCORB) .......................................... 168
12.3.3 Timer Control Register V0 (TCRV0) ............................................................... 169