Watchdog Timer - Renesas M16C Series Hardware Manual

R8C/11 Group
W a t c h d o g t i m e r c o n t r o l r e g i s t e r
b7 b6 b5 b4 b3
0 0
Watchdog timer reset register
b7
Watchdog timer start register
b7
Figure 11.2 WDC Register, WDTR Register, and WDTS Register
Rev.1.20 Jan 27, 2006
REJ09B0062-0120
b2 b1 b0
S y m b o l
W D C
B i t s y m b o l
H i g h - o r d e r b i t o f w a t c h d o g t i m e r
( b 4 - b 0 )
R e s e r v e d b i t
( b 5 )
R e s e r v e d b i t
( b 6 )
W D C 7 P r e s c a l e r s e l e c t b i t
b0
Symbol
WDTR
The watchdog is initialized after a write instruction to this register.
The watchdog timer value is always initialized to "7FFF
whatever value is written.
b0
Symbol
WDTS
The watchdog timer starts counting after a write instruction to this register.
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A d d r e s s A f t e r r e s e t
0 0 0 1 1 1 1 1 0 0 0 X X X X X
2
B i t n a m e
M u s t s e t t o " 0 "
M u s t s e t t o " 0 "
0 : D i v i d e d b y 1 6
1 : D i v i d e d b y 1 2 8
Address After reset
000D Indeterminate
16
Function
Address After reset
000E Indeterminate
16
Function

11. Watchdog Timer

2
F u n c t i o n R W
R O
R W
R W
R W
RW
" regardless of
WO
16
RW
WO