M16C62_N Datasheet, PDF (444/621 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY

Watchdog Timer
Mitsubishi microcomputers
M16C / 62 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Setting watchdog timer control register
b7
00
b0
Watchdog timer control register [Address 000F16]
WDC
Reserved bit
Must always be “0”
Prescaler select bit
0 : Divided by 16
1 : Divided by 128
Setting watchdog timer start register
b7
b0
Watchdog timer start register [Address 000E16]
WDTS
The watchdog timer is initialized and starts counting with a write instruction to
this register. The watchdog timer value is always initialized to “7FFF16”
regardless of the value written.
Generating watchdog
timer interrupt
Software reset
b7
1
b0
Processor mode register 0 [Address 000416]
PM0
Software reset bit
The device is reset when this bit is set to “1”. The value of this bit
is “0” when read.
Figure 2.11.4. Set-up procedure of watchdog timer
429