MC81F4332 Datasheet, PDF (168/198 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC81F4x16
26.2 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 26-2 Reset Sources Diagram
Internal
RESET
There are four reset sources in MC81F4x32. 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 33 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 108.
168
October 19, 2009 Ver.1.35