Datasheet

PIC16F785/HV785
DS41249E-page 108 © 2008 Microchip Technology Inc.
REGISTER 15-1: CONFIG: CONFIGURATION WORD
U-0 U-0 U-0 U-0 R/P-0 R/P-0 R/P-1 R/P-1
— — — — FCMEN IESO BOREN1 BOREN0
bit 15 bit 8
R/P-0 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
CPD CP MCLRE PWRTE WDTE FOSC2 FOSC1 FOSC0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 13-12 FCMEN: Fail-Safe Clock Monitor Enabled bit
(5)
1 = Fail-Safe Clock Monitor is enabled
0 = Fail-Safe Clock Monitor is disabled
bit 10 IESO: Internal External Switchover bit
1 = Internal External Switchover mode is enabled
0 = Internal External Switchover mode is disabled
bit 9-8 BOREN<1:0>: Brown-out Reset Selection bits
(1)
11 = BOR enabled
10 = BOR enabled during operation and disabled in Sleep
01 = BOR controlled by SBOREN bit (PCON<4>)
00 = BOR disabled
bit 7 CPD
: Data Code Protection bit
(2), (3)
1 = Data memory code protection is disabled
0 = Data memory code protection is enabled
bit 6 CP
: Code Protection bit
(2)
1 = Program memory code protection is disabled
0 = Program memory code protection is enabled
bit 5 MCLRE: RA3/MCLR
pin function select bit
(4)
1 = RA3/MCLR pin function is MCLR
0 = RA3/MCLR
pin function is digital input, MCLR internally tied to VDD
bit 4 PWRTE: Power-up Timer Enable bit
1 = PWRT disabled
0 = PWRT enabled
bit 3 WDTE: Watchdog Timer Enable bit
(5)
1 = WDT enabled
0 = WDT disabled and can be enabled by SWDTEN bit (WDTCON<0>)
bit 2-0 FOSC<2:0>: Oscillator Selection bits
111 = RC oscillator: CLKOUT function on RA4/AN3/T1G/OSC2/CLKOUT pin, RC on RA5/T1CKI/OSC1/CLKIN
110 = RCIO oscillator: I/O function on RA4/AN3/T1G/OSC2/CLKOUT pin, RC on RA5/T1CKI/OSC1/CLKIN
101 = INTOSC oscillator: CLKOUT function on RA4/AN3/T1G/OSC2/CLKOUT pin, I/O function on
RA5/T1CKI/OSC1/CLKIN
100 = INTOSCIO oscillator: I/O function on RA4/AN3/T1G/OSC2/CLKOUT pin, I/O function on
RA5/T1CKI/OSC1/CLKIN
011 = EC: I/O function on RA4/AN3/T1G/OSC2/CLKOUT pin, CLKIN on RA5/T1CKI/OSC1/CLKIN
010 = HS oscillator: High-speed crystal/resonator on RA4/AN3/T1G/OSC2/CLKOUT and RA5/T1CKI/OSC1/CLKIN
(5)
001 = XT oscillator: Crystal/resonator on RA4/AN3/T1G/OSC2/CLKOUT and RA5/T1CKI/OSC1/CLKIN
(5)
000 = LP oscillator: Low-power crystal on RA4/AN3/T1G/OSC2/CLKOUT and RA5/T1CKI/OSC1/CLKIN
(5)
Note 1: Enabling Brown-out Reset does not automatically enable Power-up Timer.
2: Program memory bulk erase must be performed to turn off code protection.
3: The entire data EEPROM 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.
5: If the HS, XT, or LP oscillator fails In Fail-safe mode the Watchdog time-out can occur only once after which it will be disabled
until the oscillator is restored.