
Rev. 2.0, 09/02, page xv of xxxviii
11.7.12 Counter Value during Complementary PWM Mode Stop...................................301
11.7.13 Buffer Operation Setting in Complementary PWM Mode ..................................302
11.7.14 Reset Sync PWM Mode Buffer Operation and Compare Match Flag.................302
11.7.15 Overflow Flags in Reset Synchronous PWM Mode............................................303
11.7.16 Contention between Overflow/Underflow and Counter Clearing........................304
11.7.17 Contention between TCNT Write and Overflow/Underflow...............................305
11.7.18 Cautions on Transition from Normal Operation or PWM Mode 1
to Reset-Synchronous PWM Mode.....................................................................305
11.7.19 Output Level in Complementary PWM Mode
and Reset-Synchronous PWM Mode...................................................................306
11.7.20 Interrupts in Module Standby Mode....................................................................306
11.7.21 Simultaneous Capture of TCNT_1 and TCNT_2 in Cascade Connection...........306
MTU Output Pin Initialization..........................................................................................306
11.8.1 Operating Modes..................................................................................................306
11.8.2 Reset Start Operation...........................................................................................307
11.8.3 Operation in Case of Re-Setting Due to Error During Operation, Etc.................307
11.8.4 Overview of Initialization Procedures and Mode Transitions
in Case of Error during Operation, Etc................................................................308
Port Output Enable (POE).................................................................................................338
11.9.1 Features................................................................................................................338
11.9.2 Pin Configuration.................................................................................................340
11.9.3 Register Descriptions...........................................................................................340
11.9.4 Operation .............................................................................................................345
11.9.5 Usage Note...........................................................................................................347
11.8
11.9
Section 12 Watchdog Timer ............................................................................. 349
12.1
Features.............................................................................................................................349
12.2
Input/Output Pin................................................................................................................350
12.3
Register Descriptions........................................................................................................350
12.3.1 Timer Counter (TCNT)........................................................................................351
12.3.2 Timer Control/Status Register (TCSR)................................................................351
12.3.3 Reset Control/Status Register (RSTCSR)............................................................353
12.4
Operation...........................................................................................................................354
12.4.1 Watchdog Timer Mode........................................................................................354
12.4.2 Interval Timer Mode............................................................................................355
12.4.3 Clearing Software Standby Mode........................................................................356
12.4.4 Timing of Setting the Overflow Flag (OVF) .......................................................356
12.4.5 Timing of Setting the Watchdog Timer Overflow Flag (WOVF)........................357
12.5
Interrupt Sources...............................................................................................................357
12.6
Usage Notes......................................................................................................................357
12.6.1 Notes on Register Access.....................................................................................357
12.6.2 TCNT Write and Increment Contention ..............................................................359
12.6.3 Changing CKS2 to CKS0 Bit Values...................................................................359