Datasheet

Page xxii of xxx
13.8.6 Mode Setting with Cascaded Connection ............................................................. 851
13.8.7 Module Stop Function Setting .............................................................................. 851
13.8.8 Interrupts in Module Stop State ............................................................................ 851
Section 14 Watchdog Timer (WDT) .................................................................853
14.1 Features.............................................................................................................................. 853
14.2 Input/Output Pin ................................................................................................................854
14.3 Register Descriptions......................................................................................................... 855
14.3.1 Timer Counter (TCNT)......................................................................................... 855
14.3.2 Timer Control/Status Register (TCSR)................................................................. 855
14.3.3 Reset Control/Status Register (RSTCSR)............................................................. 857
14.4 Operation ........................................................................................................................... 858
14.4.1 Watchdog Timer Mode......................................................................................... 858
14.4.2 Interval Timer Mode............................................................................................. 860
14.5 Interrupt Source ................................................................................................................. 860
14.6 Usage Notes ....................................................................................................................... 861
14.6.1 Notes on Register Access ..................................................................................... 861
14.6.2 Contention between Timer Counter (TCNT) Write and Increment ...................... 863
14.6.3 Changing Value of CKS2 to CKS0 ...................................................................... 863
14.6.4 Switching between Watchdog Timer Mode and Interval Timer Mode................. 863
14.6.5 Internal Reset in Watchdog Timer Mode.............................................................. 864
14.6.6 System Reset by WDTOVF Signal....................................................................... 864
Section 15 Serial Communication Interface (SCI, IrDA) .................................865
15.1 Features.............................................................................................................................. 865
15.2 Input/Output Pins...............................................................................................................868
15.3 Register Descriptions......................................................................................................... 869
15.3.1 Receive Shift Register (RSR) ............................................................................... 870
15.3.2 Receive Data Register (RDR)............................................................................... 870
15.3.3 Transmit Data Register (TDR).............................................................................. 871
15.3.4 Transmit Shift Register (TSR).............................................................................. 871
15.3.5 Serial Mode Register (SMR) ................................................................................ 871
15.3.6 Serial Control Register (SCR) .............................................................................. 875
15.3.7 Serial Status Register (SSR) ................................................................................. 880
15.3.8 Smart Card Mode Register (SCMR)..................................................................... 888
15.3.9 Bit Rate Register (BRR) ....................................................................................... 889
15.3.10 IrDA Control Register (IrCR)............................................................................... 897
15.3.11 Serial Extension Mode Register (SEMR) ............................................................. 898
15.4 Operation in Asynchronous Mode ..................................................................................... 900
15.4.1 Data Transfer Format............................................................................................ 900