Datasheet
PIC16F630/676
DS40039E-page 54 © 2007 Microchip Technology Inc.
9.1 Configuration Bits
The configuration bits can be programmed (read as '0'),
or left unprogrammed (read as '1') to select various
device configurations, as shown in Register 9-1. These
bits are mapped in program memory location 2007h.
REGISTER 9-1: CONFIG — CONFIGURATION WORD (ADDRESS: 2007h)
Note: Address 2007h is beyond the user program
memory space. It belongs to the special con-
figuration memory space (2000h - 3FFFh),
which can be accessed only during program-
ming. See PIC16F630/676 Programming
Specification for more information.
R/P-1 R/P-1 U-0 U-0 U-0 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
BG1 BG0
— — —CPDCP BODEN MCLRE PWRTE WDTE F0SC2 F0SC1 F0SC0
bit 13 bit 0
bit 13-12 BG1:BG0: Bandgap Calibration bits for BOD and POR voltage
(1)
00 = Lowest bandgap voltage
11 = Highest bandgap voltage
bit 11-9 Unimplemented: Read as ‘0’
bit 8 CPD
: Data Code Protection bit
(2)
1 = Data memory code protection is disabled
0 = Data memory code protection is enabled
bit 7 CP
: Code Protection bit
(3)
1 = Program Memory code protection is disabled
0 = Program Memory code protection is enabled
bit 6 BODEN: Brown-out Detect Enable bit
(4)
1 = BOD enabled
0 = BOD disabled
bit 5 MCLRE: RA3/MCLR
pin function select
(5)
1 = RA3/MCLR pin function is MCLR
0 = RA3/MCLR
pin function is digital I/O, 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
1 = WDT enabled
0 = WDT disabled
bit 2-0 FOSC2:FOSC0: Oscillator Selection bits
111 = RC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN
110 = RC oscillator: I/O function on RA4/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN
101 = INTOSC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, I/O function on RA5/OSC1/CLKIN
100 = INTOSC 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: The Bandgap Calibration bits are factory programmed and must be read and saved prior to erasing
the device as specified in the PIC16F630/676 Programming Specification. These bits are reflected
in an export of the configuration word. Microchip Development Tools maintain all calibration bits to
factory settings.
2: The entire data EEPROM will be erased when the code protection is turned off.
3: The entire program memory will be erased, including OSCCAL value, when the code protection is
turned off.
4: Enabling Brown-out Detect does not automatically enable Power-up Timer.
5: When MCLR
is asserted in INTOSC or RC mode, the internal clock oscillator is disabled.
Legend:
P = Programmed using ICSP
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