PIC18FXX20
REGISTER 23-1: CONFIG1H:CONFIGURATIONREGISTER1HIGH(BYTEADDRESS300001h)
U-0
—
bit 7
U-0
—
R/P-1
OSCSEN
U-0
—
U-0
—
R/P-1
FOSC2
R/P-1
FOSC1
R/P-1
FOSC0
bit 0
bit 7-6
bit 5
Unimplemented: Read as ‘0’
OSCSEN: Oscillator System Clock Switch Enable bit
1= Oscillator system clock switch option is disabled (main oscillator is source)
0= Timer1 Oscillator system clock switch option is enabled (oscillator switching is enabled)
Unimplemented: Read as ‘0’
bit 4-3
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 FOSC)
101= EC oscillator w/ OSC2 configured as RA6
100= EC oscillator w/ OSC2 configured as divide-by-4 clock output
011= RC oscillator w/ OSC2 configured as divide-by-4 clock output
010= HS oscillator
001= XT oscillator
000= LP oscillator
Legend:
R = Readable bit
- n = Value when device is unprogrammed
P = Programmable bit U = Unimplemented bit, read as ‘0’
u = Unchanged from programmed state
REGISTER 23-2: CONFIG2L:CONFIGURATION REGISTER 2 LOW (BYTE ADDRESS300002h)
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
R/P-1
BORV1
R/P-1
R/P-1
R/P-1
BORV0 BOREN PWRTEN
bit 0
bit 7-4
bit 3-2
Unimplemented: Read as ‘0’
BORV1:BORV0: Brown-out Reset Voltage bits
11= VBOR set to 2.5V
10= VBOR set to 2.7V
01= VBOR set to 4.2V
00= VBOR set to 4.5V
bit 1
bit 0
BOREN: Brown-out Reset Enable bit
1= Brown-out Reset enabled
0= Brown-out Reset disabled
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
2003 Microchip Technology Inc.
Advance Information
DS39609A-page 241
MICROCHIP [ MICROCHIP ]
