PIC12F635/PIC16F636/639
REGISTER 12-1: CONFIG: CONFIGURATION WORD REGISTER
—
—
—
WURE
FCMEN
WDTE
IESO
BOREN1
FOSC1
BOREN0
bit 8
bit 15
bit 7
CPD
CP
MCLRE
PWRTE
FOSC2
FOSC0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
P = Programmable’
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
x = Bit is unknown
bit 15-13
bit 12
Unimplemented: Read as ‘1’
WURE: Wake-up Reset Enable bit
1= Standard wake-up and continue enabled
0= Wake-up and Reset enabled
bit 11
bit 10
bit 9-8
FCMEN: Fail-Safe Clock Monitor Enabled bit
1= Fail-Safe Clock Monitor is enabled
0= Fail-Safe Clock Monitor is disabled
IESO: Internal External Switchover bit
1= Internal External Switchover mode is enabled
0= Internal External Switchover mode is disabled
(1)
BOREN<1:0>: Brown-out Reset Selection bits
11= BOR enabled, SBOREN bit disabled
10= BOR enabled during operation and disabled in Sleep, SBOREN bit disabled
01= BOR controlled by SBOREN bit of the PCON register
00= BOR and SBOREN bits disabled
(2)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
CPD: Data Code Protection bit
1= Data memory code protection is disabled
0= Data memory code protection is enabled
(3)
CP: Code Protection bit
1= Program memory code protection is disabled
0= Program memory code protection is enabled
(4)
MCLRE: MCLR pin function select bit
1= MCLR pin function is MCLR
0= MCLR pin function is digital input, MCLR internally tied to VDD
PWRTE: Power-up Timer Enable bit
1= PWRT disabled
0= PWRT enabled
WDTE: Watchdog Timer Enable bit
1= WDT enabled
0= WDT disabled and can be enabled by SWDTEN bit of the WDTCON register
FOSC<2:0>: Oscillator Selection bits
111= EXTRC oscillator: External RC on RA5/OSC1/CLKIN, CLKOUT function on RA4/OSC2/CLKOUT pin
110= EXTRCIO oscillator: External RC on RA5/OSC1/CLKIN, I/O function on RA4/OSC2/CLKOUT pin
101= INTOSC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, I/O function on RA5/OSC1/CLKIN
100= INTOSCIO oscillator: I/O function on RA4/OSC2/CLKOUT pin, I/O function on RA5/OSC1/CLKIN
011= EC: I/O function on RA4/OSC2/CLKOUT pin, CLKIN on RA5/OSC1/CLKIN
010= HS oscillator: High-speed crystal/resonator on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN
001= XT oscillator: Crystal/resonator on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN
000= LP oscillator: Low-power crystal on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN
Note 1: Enabling Brown-out Reset does not automatically enable Power-up Timer.
2: The entire data EEPROM will be erased when the code protection is turned off.
3: The entire program memory will be erased when the code protection is turned off.
4: When MCLR is asserted in INTOSC or RC mode, the internal clock oscillator is disabled.
DS41232D-page 130
© 2007 Microchip Technology Inc.
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