PIC16LC717T-I/SO View Datasheet(PDF) - Microchip Technology
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PIC16LC717T-I/SO Datasheet PDF : 200 Pages
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PIC16C717/770/771
2.2.2.8 PCON REGISTER
The Power Control (PCON) register contains a flag bit
to allow differentiation between a Power-on Reset
(POR) to an external MCLR Reset or WDT Reset.
Those devices with brown-out detection circuitry con-
tain an additional bit to differentiate a Brown-out Reset
condition from a Power-on Reset condition.
The PCON register also contains the frequency select
bit of the INTRC or ER oscillator.
Note:
BOR is unknown on Power-on Reset. It
must then be set by the user and checked
on subsequent resets to see if BOR is
clear, indicating a brown-out has occurred.
The BOR status bit is a don’t care and is
not necessarily predictable if the brown-out
circuit is disabled (by clearing the BODEN
bit in the Configuration word).
REGISTER 2-8: POWER CONTROL REGISTER (PCON: 8Eh)
U-0
U-0
U-0
U-0
R/W-1
U-0
R/W-q R/W-q
—
—
—
—
OSCF
—
POR
BOR
R = Readable bit
bit7
bit0 W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
bit 7-4,2: Unimplemented: Read as ’0’
bit 3:
OSCF: Oscillator speed
INTRC Mode
1 = 4 MHz nominal
0 = 37 KHz nominal
ER Mode
1 = Oscillator frequency depends on the external resistor value on the OSC1 pin.
0 = 37 KHz nominal
All other modes
x = Ignored
bit 1:
POR: Power-on Reset Status bit
1 = No Power-on Reset occurred
0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)
bit 0:
BOR: Brown-out Reset Status bit
1 = No Brown-out Reset occurred
0 = A Brown-out Reset occurred (must be set in software after a Brown-out Reset occurs)
© 1999 Microchip Technology Inc.
Advanced Information
DS41120A-page 23
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