PIC16F684-ESLASHST datasheet(94/164 Pages) MICROCHIP

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PIC16F684

DS41202C-page 92

Preliminary

 2004 Microchip Technology Inc.

12.1

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 12-1.

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

configuration

memory

space

(2000h-

3FFFh), which can be accessed only during

programming. See “PIC12F6XX/16F6XX

Memory

Programming

Specification”

(DS41204) for more information.

—

FCMEN

IESO

BODEN1 BODEN0

CPD

MCLRE

PWRTE

WDTE

FOSC2 FOSC1 FOSC0

bit 13

bit 0

bit 13-12

Unimplemented: Read as ‘1’

bit 11

FCMEN: Fail-Safe Clock Monitor Enabled bit

= Fail-Safe Clock Monitor is enabled

= Fail-Safe Clock Monitor is disabled

bit 10

IESO: Internal External Switchover bit

= Internal External Switchover mode is enabled

= Internal External Switchover mode is disabled

bit 9-8

BODEN<1:0>: Brown-out Detect Selection bits(1)

= BOD enabled

= BOD enabled during operation and disabled in Sleep

= BOD controlled by SBODEN bit (PCON<4>)

= BOD disabled

bit 7

CPD: Data Code Protection bit(2)

= Data memory code protection is disabled

= Data memory code protection is enabled

bit 6

CP: Code Protection bit(3)

= Program memory code protection is disabled

= Program memory code protection is enabled

bit 5

MCLRE: RA3/MCLR pin function select bit(4)

= RA3/MCLR pin function is MCLR

= RA3/MCLR pin function is digital input, MCLR internally tied to VDD

bit 4

PWRTE: Power-up Timer Enable bit

= PWRT disabled

= PWRT enabled

bit 3

WDTE: Watchdog Timer Enable bit

= WDT enabled

= 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/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN

110

= RCIO 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

= 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 Detect does not automatically enable Power-up Timer.

The entire data EEPROM will be erased when the code protection is turned off.

The entire program memory will be erased when the code protection is turned off.

When MCLR is asserted in INTOSC or RC mode, the internal clock oscillator is disabled.

Legend:

R = Readable

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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