M16C User Manual.pdf

Watchdog TimerMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTER(6) Registers related to the watchdog timerFigure 2.11.1 shows the memory map of watchdog timer-related registers, and Figure 2.11.2 showswatchdog timer-related registers.000E16000F16Watchdog timer start register (WDTS)Watchdog timer control register (WDC)Figure 2.11.1. Memory map of watchdog timer-related registersWatchdog timer control registerb7 b6 b5 b4 b3 b2 b1 b000Symbol Address When resetWDC 000F16 000XXXXX2Bit symbolHigh-order bit of watchdog timerReserved bitWDC7Bit nameFunctionMust always be set to “0”Reserved bit Must always be set to “0”Prescaler select bit 0 : Divided by 161 : Divided by 128R WWatchdog timer start registerb7b0Symbol Address When resetWDTS 000E16 IndeterminateFunctionThe watchdog timer is initialized and starts counting after a write instruction tothis register. The watchdog timer value is always initialized to “7FFF16”regardless of whatever value is written.R WFigure 2.11.2. Watchdog timer-related registers427