MC81F4104 Datasheet, PDF (88/118 Pages) Finechips – ABOV SEMICONDUCTOR

MC81F4104
20.2 Reset Sources
External RESET
WDT Reset
POR/LVR
Power on reset or
Low voltage reset
Noise
canceller
Noise
canceller
Clear
S
Q
Overflow
R
BIT
Figure 20-2 Reset Sources Diagram
Internal
RESET
There are four reset sources in MC81F4104. Those are external reset, watch dog timer reset, power
on reset and low voltage reset.
20.3 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 „7.6 Serial Electric Characteristics‟ on page23 for
more timing information.)
It is possible to use a external power on reset circuit like Figure 20-3.
Figure 20-3 External Power On Reset Example
20.4 Watch Dog Timer Reset
See „15. WATCH DOG TIMER‟ on page 70.
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October 19, 2009 Ver.1.35