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S3F84B8_UM_REV 1.00
Watchdog RESET
RESET
V
DD
NOTE: To program the duration of oscillation stabilization interval, you must 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 when a basic timer counter overflow occurs), you can disable it by writing "1010B" to the upper nibble of BTCON.
N.F
Longger than 1us
Comparator
V
IN
+
V
REF
-
V
DD
V
REF
BGR
NOTES:
1. The target of voltage detection level is the one you selected at smart option 3FH.
2. BGR is Band Gap voltage Reference
Figure 8-1
N.F
Longger than 1us
Smart Option 3FH.7
Low Voltage Reset Circuit
8-2
8 RESET AND POWER-DOWN
Internal System
RESETB
When the V
level
DD
is lower than V
LVR
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