PIC16F676-ESLASHST datasheet(56/132 Pages) MICROCHIP

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PIC16F630/676

DS40039F-page 56

 2010 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.

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

R/P-1

BG1

BG0

—

—CPD

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 bit(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

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