MC81F4x16
26.2 Reset Sources
Noise
canceller
External RESET
WDT Reset
POR/LVR
Internal
RESET
S
R
Q
Overflow
Noise
canceller
Clear
Power on reset or
Low voltage reset
BIT
Figure 26-2 Reset Sources Diagram
There are four reset sources in MC81F4x16. Those are external reset, watch dog timer reset, power
on reset and low voltage reset.
26.3 External Reset
When the external reset is enabled and the input signal of RESET pin is going to low for a while and
going to high, the external reset is occurred.( See „7.7 Serial I/O Characteristics‟ on page 37 for more
timing information.)
It is possible to use a external power on reset circuit like Figure 26-3.
Figure 26-3 External Power On Reset Example
26.4 Watch Dog Timer Reset
See „16. WATCH DOG TIMER‟ on page 112.
170
October 19, 2009 Ver.1.35
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