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S3F84B8_UM_REV 1.00
Watchdog RESET
External RESETB
V
DD
NOTE: To program the duration of the oscillation stabilization interval, set the basic timer control register, BTCON, before
entering the Stop mode. If you do not want to use the basic timer watchdog function (which causes a system reset if
basic timer counter overflows), you can disable it by writing '1010B' to the upper nibble of BTCON.
N.F
Longer than 10us
Comparator
V
IN
+
V
REF
-
Longger than 1us
V
DD
V
BGR
REF
NOTE: BGR is Band Gap reference voltage.
Figure 20-1
N.F
Smart Option 3FH.7
Low Voltage Reset Circuit
20-2
20 LOW VOLTAGE RESET
nRESET
When the V
level is lower
DD
than V
LVR
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