Datasheet

Rev.7.00 Mar. 18, 2009 page xxxv of lxvi
REJ09B0109-0700
Section 14 Watchdog Timer (WDT)..................................................................677
14.1 Features.............................................................................................................................. 677
14.2 Input/Output Pin................................................................................................................. 678
14.3 Register Descriptions......................................................................................................... 679
14.3.1 Timer Counter (TCNT)......................................................................................... 679
14.3.2 Timer Control/Status Register (TCSR)................................................................. 679
14.3.3 Reset Control/Status Register (RSTCSR)............................................................. 681
14.4 Operation............................................................................................................................ 682
14.4.1 Watchdog Timer Mode......................................................................................... 682
14.4.2 Interval Timer Mode............................................................................................. 683
14.5 Interrupt Source ................................................................................................................. 684
14.6 Usage Notes ....................................................................................................................... 684
14.6.1 Notes on Register Access...................................................................................... 684
14.6.2 Contention between Timer Counter (TCNT) Write and Increment ...................... 686
14.6.3 Changing Value of CKS2 to CKS0....................................................................... 686
14.6.4 Switching between Watchdog Timer Mode and Interval Timer Mode................. 686
14.6.5 Internal Reset in Watchdog Timer Mode.............................................................. 687
14.6.6 System Reset by WDTOVF Signal....................................................................... 687
Section 15 Serial Communication Interface (SCI, IrDA)..................................689
15.1 Features.............................................................................................................................. 689
15.2 Input/Output Pins............................................................................................................... 692
15.3 Register Descriptions......................................................................................................... 693
15.3.1 Receive Shift Register (RSR) ............................................................................... 694
15.3.2 Receive Data Register (RDR)............................................................................... 694
15.3.3 Transmit Data Register (TDR).............................................................................. 694
15.3.4 Transmit Shift Register (TSR).............................................................................. 695
15.3.5 Serial Mode Register (SMR)................................................................................. 695
15.3.6 Serial Control Register (SCR)............................................................................... 698
15.3.7 Serial Status Register (SSR) ................................................................................. 703
15.3.8 Smart Card Mode Register (SCMR)..................................................................... 710
15.3.9 Bit Rate Register (BRR) ....................................................................................... 711
15.3.10 IrDA Control Register (IrCR)............................................................................... 720
15.3.11 Serial Extension Mode Register (SEMR) ............................................................. 721
15.4 Operation in Asynchronous Mode ..................................................................................... 723
15.4.1 Data Transfer Format............................................................................................ 723
15.4.2 Receive Data Sampling Timing and Reception Margin
in Asynchronous Mode......................................................................................... 725
15.4.3 Clock..................................................................................................................... 726
15.4.4 SCI Initialization (Asynchronous Mode).............................................................. 727
15.4.5 Data Transmission (Asynchronous Mode)............................................................ 728