tmp86fh46bng TOSHIBA Semiconductor CORPORATION, tmp86fh46bng Datasheet - Page 69

• Manufacturer Part Number: tmp86fh46bng
• Description: 8 Bit Microcontroller Tlcs-870/c Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

6. Watchdog Timer (WDT)
6.1
rious noises or the deadlock conditions, and return the CPU to a system recovery routine.
rupt request”. Upon the reset release, this signal is initialized to “reset request”.
terrupt.
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 “inter-
When the watchdog timer is not used to detect malfunctions, it can be used as the timer to provide a periodic in-
Watchdog Timer Configuration
Note:Care must be taken in system design since the watchdog timer functions are not be operated completely
Internal reset
fc/2
fc/2
fc/2
fc/2
due to effect of disturbing noise.
23
21
19
17
or fs/2
or fs/2
or fs/2
or fs/2
15
13
11
9
WDTT
2
0034
WDTEN
Watchdog timer control registers
Figure 6-1 Watchdog Timer Configuration
H
WDTCR1
Clock
Clear
S R
Q
Binary counters
Writing
disable code
1
Controller
0035
2
H
WDTCR2
Page 51
Overflow
Writing
clear code
WDT output
WDTOUT
Reset release
Interrupt request
R
S
Q
TMP86FH46BNG
Reset
request
INTWDT
interrupt
request