Datasheet

PIC18FXX8
DS41159E-page 266 © 2006 Microchip Technology Inc.
REGISTER 24-1: CONFIG1H: CONFIGURATION REGISTER 1 HIGH (BYTE ADDRESS 300001h)
REGISTER 24-2: CONFIG2L: CONFIGURATION REGISTER 2 LOW (BYTE ADDRESS 300002h)
U-0 U-0 R/P-1 U-0 U-0 R/P-1 R/P-1 R/P-1
— — OSCSEN — — FOSC2 FOSC1 FOSC0
bit 7 bit 0
bit 7-6 Unimplemented: Read as ‘0’
bit 5 OSCSEN
: Oscillator System Clock Switch Enable bit
1 = Oscillator system clock switch option is disabled (main oscillator is source)
0 = Oscillator system clock switch option is enabled (oscillator switching is enabled)
bit 4-3 Unimplemented: Read as ‘0’
bit 2-0 FOSC2:FOSC0: Oscillator Selection bits
111 = RC oscillator w/OSC2 configured as RA6
110 = HS oscillator with PLL enabled/clock frequency = (4 x F
OSC)
101 = EC oscillator w/OSC2 configured as RA6
100 = EC oscillator w/OSC2 configured as divide-by-4 clock output
011 = RC oscillator
010 = HS oscillator
001 = XT oscillator
000 = LP oscillator
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed u = Unchanged from programmed state
U-0 U-0 U-0 U-0 R/P-1 R/P-1 R/P-1 R/P-1
— — — — BORV1 BORV0 BOREN PWRTEN
bit 7 bit 0
bit 7-4 Unimplemented: Read as ‘0’
bit 3-2 BORV1:BORV0: Brown-out Reset Voltage bits
11 = V
BOR set to 2.0V
10 = V
BOR set to 2.7V
01 = V
BOR set to 4.2V
00 = V
BOR set to 4.5V
bit 1 BOREN: Brown-out Reset Enable bit
1 = Brown-out Reset enabled
0 = Brown-out Reset disabled
bit 0 PWRTEN: Power-up Timer Enable bit
1 = PWRT disabled
0 = PWRT enabled
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed u = Unchanged from programmed state