M16C6K9 Datasheet, PDF (69/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Watchdog Timer
Watchdog timer control register
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
WDC
Address
000F16
Bit symbol
Bit name
High-order bit of watchdog timer
Reserved bit
Reserved bit
WDC7
Prescaler select bit
When reset
000XXXXX2
Function
Must always be set to “0”
Must always be set to “0”
0 : Divided by 16
1 : Divided by 128
RW
Watchdog timer start register
b7
b0
Symbol
Address
When reset
WDTS
000E16 Indeterminate
Function
RW
The watchdog timer is initialized and starts counting after a write instruction to
this register. The watchdog timer value is always initialized to “7FFF16”
regardless of whatever value is written.
Fig.DG-2 Watchdog timer control and start registers
Rev.1.00 Jun 06, 2003 page 69 of 290