PIC18F87K22 Datasheet, PDF (404/548 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt XLP Technology

PIC18F87K22 FAMILY
REGISTER 28-2: CONFIG1H: CONFIGURATION REGISTER 1 HIGH (BYTE ADDRESS 300001h)
R/P-0
IESO
bit 7
R/P-0
FCMEN
U-0
U-0
R/P-1
R/P-0
R/P-0
R/P-0
—
PLLCFG⁽¹⁾ FOSC3⁽²⁾
FOSC2⁽²⁾
FOSC1⁽²⁾ FOSC0⁽²⁾
bit 0
Legend:
R = Readable bit
-n = Value at POR
P = Programmable bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5
bit 4
bit 3-0
IESO: Internal/External Oscillator Switchover bit
1 = Two-Speed Start-up is enabled
0 = Two-Speed Start-up is disabled
FCMEN: Fail-Safe Clock Monitor Enable bit
1 = Fail-Safe Clock Monitor is enabled
0 = Fail-Safe Clock Monitor is disabled
Unimplemented: Read as ‘0’
PLLCFG: 4x PLL Enable bit⁽¹⁾
1 = Oscillator is multiplied by 4
0 = Oscillator is used directly
FOSC<3:0>: Oscillator Selection bits⁽²⁾
1101 = EC1, EC oscillator (low power, DC-160 kHz)
1100 = EC1IO, EC oscillator with CLKOUT function on RA6 (low power, DC-160 kHz)
1011 = EC2, EC oscillator (medium power, 160 kHz-4 MHz)
1010 = EC2IO, EC oscillator with CLKOUT function on RA6 (medium power, DC-160 kHz)
1001 = INTIO1, internal RC oscillator with CLKOUT function on RA6
1000 = INTIO2, internal RC oscillator
0111 = RC, external RC oscillator
0110 = RCIO, external RC oscillator with CKLOUT function on RA6
0101 = EC3, EC oscillator (high power, 4 MHz-64 MHz)
0100 = EC3IO, EC oscillator with CLKOUT function on RA6 (high power, 4 MHz-64 MHz)
0011 = HS1, HS oscillator (medium power, 4 MHz-16 MHz)
0010 = HS2, HS oscillator (high power, 16 MHz-25 MHz)
0001 = XT oscillator
0000 = LP oscillator
Note 1: Not valid for the INTIOx PLL mode.
2: INTIO + PLL can be enabled only by the PLLEN bit (OSCTUNE<6>). Other PLL modes can be enabled by
either the PLLEN bit or the PLLCFG (CONFIG1H<4>) bit.
DS39960B-page 404
Preliminary
 2010 Microchip Technology Inc.