
Rev. 2.0, 09/02, page xvi of xxxviii
12.6.4 Changing between Watchdog Timer/Interval Timer Modes................................359
12.6.5 System Reset by
WDTOVF
Signal......................................................................360
12.6.6 Internal Reset in Watchdog Timer Mode.............................................................360
12.6.7 Manual Reset in Watchdog Timer Mode.............................................................360
Section 13 Serial Communication Interface (SCI)............................................361
13.1
Features.............................................................................................................................361
13.2
Input/Output Pins..............................................................................................................363
13.3
Register Descriptions........................................................................................................363
13.3.1 Receive Shift Register (RSR) ..............................................................................365
13.3.2 Receive Data Register (RDR)..............................................................................365
13.3.3 Transmit Shift Register (TSR).............................................................................365
13.3.4 Transmit Data Register (TDR).............................................................................365
13.3.5 Serial Mode Register (SMR)................................................................................366
13.3.6 Serial Control Register (SCR)..............................................................................367
13.3.7 Serial Status Register (SSR) ................................................................................369
13.3.8 Serial Direction Control Register (SDCR)...........................................................372
13.3.9 Bit Rate Register (BRR) ......................................................................................373
13.4
Operation in Asynchronous Mode....................................................................................381
13.4.1 Data Transfer Format...........................................................................................382
13.4.2 Receive Data Sampling Timing and Reception Margin
in Asynchronous Mode........................................................................................383
13.4.3 Clock....................................................................................................................384
13.4.4 SCI initialization (Asynchronous mode)..............................................................385
13.4.5 Data transmission (Asynchronous mode)............................................................386
13.4.6 Serial data reception (Asynchronous mode)........................................................388
13.5
Multiprocessor Communication Function.........................................................................392
13.5.1 Multiprocessor Serial Data Transmission............................................................394
13.5.2 Multiprocessor Serial Data Reception .................................................................395
13.6
Operation in Clocked Synchronous Mode........................................................................398
13.6.1 Clock....................................................................................................................398
13.6.2 SCI initialization (Clocked Synchronous mode)..................................................398
13.6.3 Serial data transmission (Clocked Synchronous mode).......................................400
13.6.4 Serial data reception (Clocked Synchronous mode)............................................402
13.6.5 Simultaneous Serial Data Transmission and Reception
(Clocked Synchronous mode)..............................................................................404
13.7
Interrupt Sources...............................................................................................................406
13.7.1 Interrupts in Normal Serial Communication Interface Mode ..............................406
13.8
Usage Notes......................................................................................................................408
13.8.1 TDR Write and TDRE Flag.................................................................................408
13.8.2 Module Standby Mode Setting ............................................................................408
13.8.3 Break Detection and Processing (Asynchronous Mode Only).............................408
13.8.4 Sending a Break Signal (Asynchronous Mode Only)..........................................408