PIC18F6525_13 Datasheet, PDF (260/400 Pages) Microchip Technology – 64/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with A/D

PIC18F6525/6621/8525/8621
REGISTER 24-1:
CONFIG1H: CONFIGURATION REGISTER 1 HIGH (BYTE ADDRESS 300001h)
U-0
U-0
R/P-1
U-0
R/P-1
R/P-1
R/P-1
R/P-1
—
—
OSCSEN
—
FOSC3 FOSC2 FOSC1 FOSC0
bit 7
bit 0
bit 7-6
bit 5
bit 4
bit 3-0
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’
FOSC3:FOSC0: Oscillator Selection bits
1111 = RC oscillator with OSC2 configured as RA6
1110 = HS oscillator with SW enabled 4x PLL
1101 = EC oscillator with OSC2 configured as RA6 and SW enabled 4x PLL
1100 = EC oscillator with OSC2 configured as RA6 and HW enabled 4x PLL
1011 = Reserved; do not use
1010 = Reserved; do not use
1001 = Reserved; do not use
1000 = Reserved; do not use
0111 = RC oscillator with OSC2 configured as RA6
0110 = HS oscillator with HW enabled 4x PLL
0101 = EC oscillator with OSC2 configured as RA6
0100 = EC oscillator with OSC2 configured as divide by 4 clock output
0011 = RC oscillator with OSC2 configured as divide by 4 clock output
0010 = HS oscillator
0001 = XT oscillator
0000 = LP oscillator
Legend:
R = Readable bit
P = Programmable bit
-n = Value when device is unprogrammed
U = Unimplemented bit, read as ‘0’
u = Unchanged from programmed state
DS39612C-page 260
 2003-2013 Microchip Technology Inc.