PIC16F676-I Datasheet, PDF (56/132 Pages) Microchip Technology – 14-Pin, Flash-Based 8-Bit CMOS Microcontrollers

PIC16F630/676
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.
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.
REGISTER 9-1: CONFIG — CONFIGURATION WORD (ADDRESS: 2007h)
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 —
—
— CPD CP BODEN MCLRE PWRTE WDTE F0SC2 F0SC1 F0SC0
bit 13
bit 0
bit 13-12
bit 11-9
bit 8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
BG1:BG0: Bandgap Calibration bits for BOD and POR voltage⁽¹⁾
00 = Lowest bandgap voltage
11 = Highest bandgap voltage
Unimplemented: Read as ‘0’
CPD: Data Code Protection bit⁽²⁾
1 = Data memory code protection is disabled
0 = Data memory code protection is enabled
CP: Code Protection bit⁽³⁾
1 = Program Memory code protection is disabled
0 = Program Memory code protection is enabled
BODEN: Brown-out Detect Enable bit⁽⁴⁾
1 = BOD enabled
0 = BOD disabled
MCLRE: RA3/MCLR pin function select bit⁽⁵⁾
1 = RA3/MCLR pin function is MCLR
0 = RA3/MCLR pin function is digital I/O, 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
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
DS40039F-page 56
 2010 Microchip Technology Inc.