tmp88ps42ng TOSHIBA Semiconductor CORPORATION, tmp88ps42ng Datasheet - Page 69
tmp88ps42ng
Manufacturer Part Number
tmp88ps42ng
Description
8 Bit Microcontroller Tlcs-870/x Series
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP88PS42NG.pdf
(226 pages)
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7. Watchdog Timer (WDT)
7.1 Watchdog Timer Configuration
rious noises or the deadlock conditions, and return the CPU to a system recovery routine.
nonmaskable interrupt request”. Upon the reset release, this signal is initialized to “reset request”.
rupt.
Internal reset
The watchdog timer is a fail-safe system to detect rapidly the CPU malfunctions such as endless loops due to spu-
The watchdog timer signal for detecting malfunctions can be programmed only once as “reset request” or “pseudo
When the watchdog timer is not used to detect malfunctions, it can be used as the timer to provide a periodic inter-
Note: Care must be taken in system design since the watchdog timer functions are not be operated completely due to
fc/2
fc/2
fc/2
fc/2
23
21
19
17
effect of disturbing noise.
,fc/2
,fc/2
,fc/2
,fc/2
24
22
20
18
WDTT
2
0034
WDTEN
Watchdog timer control registers
H
WDTCR1
Figure 7-1 Watchdog Timer Configuration
Clock
Clear
S R
Q
Binary counters
Writing
disable code
1
Controller
0035
2
H
WDTCR2
Overflow
Page 59
Writing
clear code
WDT output
WDTOUT
Reset release
Interrupt request
R
S
Q
TMP88PS42NG
Reset
request
INTWDT
interrupt
request
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