Datasheet

PIC12F508/509/16F505

(1)

— — — — — — MCLRE CP WDTE FOSC2 FOSC1 FOSC0

bit 11 bit 0

bit 11-6 Unimplemented: Read as ‘0’

bit 5 MCLRE: RB3/MCLR

Pin Function Select bit

1 = RB3/MCLR

pin function is MCLR

0 = RB3/MCLR pin function is digital I/O, MCLR internally tied to VDD

bit 4 CP: Code Protection bit

1 = Code protection off

0 = Code protection on

bit 3 WDTE: Watchdog Timer Enable bit

1 = WDT enabled

0 = WDT disabled

bit 2-0 FOSC<1:0>: Oscillator Selection bits

111 = External RC oscillator/CLKOUT function on RB4/OSC2/CLKOUT pin

110 = External RC oscillator/RB4 function on RB4/OSC2/CLKOUT pin

101 = Internal RC oscillator/CLKOUT function on RB4/OSC2/CLKOUT pin

100 = Internal RC oscillator/RB4 function on RB4/OSC2/CLKOUT pin

011 = EC oscillator/RB4 function on RB4/OSC2/CLKOUT pin

010 = HS oscillator

001 = XT oscillator

000 = LP oscillator

Note 1: Refer to the “PIC16F505 Memory Programming Specifications” (DS41226) to determine how to

access the Configuration Word. The Configuration Word is not user addressable during device

operation.

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