PIC16C55X(A)
7.4.5
POWER CONTROL/STATUS REGISTER
(PCON)
Bit1 is POR (Power-on-reset). It is
a ‘0’ on
power-on-reset and unaffected otherwise. The user
must write a ‘1’ to this bit following a power-on-reset.
On a subsequent reset if POR is ‘0’, it will indicate that
a power-on-reset must have occurred (VDD may have
gone too low).
TABLE 7-3:
TIME-OUT IN VARIOUS SITUATIONS
Power-up
Wake-up from
SLEEP
Oscillator Configuration
PWRTE = 0
PWRTE = 1
XT, HS, LP
RC
72 ms + 1024 TOSC
72 ms
1024 TOSC
—
1024 TOSC
—
TABLE 7-4:
POR
STATUS BITS AND THEIR SIGNIFICANCE
TO
PD
Power-on-reset
0
0
0
1
1
1
1
1
0
X
0
0
1
1
1
X
0
1
0
1
0
Illegal, TO is set on POR
Illegal, PD is set on POR
WDT Reset
WDT Wake-up
MCLR reset during normal operation
MCLR reset during SLEEP
1997 Microchip Technology Inc.
Preliminary
DS40143B-page 41
MICROCHIP [ MICROCHIP ]
