W78IRD2 Datasheet, PDF (50/76 Pages) Winbond – 8-BIT MICROCONTROLLER

W78IRD2
11.5 Watchdog Timer
The Watchdog Timer is a free-running timer that serves as a system monitor. It is implemented in
module 4, which can still be used for other modes if the Watchdog Timer is not needed.
CIDL WDTE
-
-
-
CPS1 CPS0 ECF
CMOD(D9H)
Write To
CCAP4L
0
CCAP4H CCAP4L Module4
Write To
CCAP4H
16-bit Comparator
1
Enable
Match
CH
CL
PCA Timer/Counter
RESET
-
ECOM4 CAPP4 CAPN4 MAT4 TOG4 PWM4 ECCF4
CCAPM4(DEH)
0
0
1
x
0
x
Figure 11-6 PCA Watchdog Timer Mode
The program first loads a 16-bit value into the compare registers. Then, like the other compare modes,
this 16-bit value is compared to the PCA timer value. If a match occurs, an internal reset is generated,
but it does not make the RST pin go high.
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