tmp86c809ng TOSHIBA Semiconductor CORPORATION, tmp86c809ng Datasheet - Page 71
tmp86c809ng
Manufacturer Part Number
tmp86c809ng
Description
8 Bit Microcontroller Tlcs-870/c Series
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP86C809NG.pdf
(154 pages)
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7.2.5 Watchdog Timer Reset
Clock
Binary counter
Overflow
INTWDT interrupt request
(WDTCR1<WDTOUT>= "0")
Internal reset
(WDTCR1<WDTOUT>= "1")
request is generated. When a watchdog timer reset request is generated, the internal hardware is reset. The reset
time is maximum 24/fc [s] (1.5 µs @ fc = 16.0 MHz).
When a binary-counter overflow occurs while WDTCR1<WDTOUT> is set to “1”, a watchdog timer reset
Note:When a watchdog timer reset is generated in the SLOW1 mode, the reset time is maximum 24/fc (high-fre-
quency clock) since the high-frequency clock oscillator is restarted. However, when crystals have inaccura-
cies upon start of the high-frequency clock oscillator, the reset time should be considered as an approximate
value because it has slight errors.
1
Figure 7-2 Watchdog Timer Interrupt
Write 4E
2
H
to WDTCR2
3
2
17
/fc
0
Page 61
1
2
19
/fc [s]
2
3
A reset occurs
0
TMP86C809NG
(WDTT=11)
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