PIC18F87J90 Datasheet, PDF (328/450 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F87J90 FAMILY
REGISTER 25-3: CONFIG2L: CONFIGURATION REGISTER 2 LOW (BYTE ADDRESS 300002h)
R/WO-1
IESO
bit 7
R/WO-1
FCMEN
U-0
R/WO-1
R/WO-1
R/WO-1
R/WO-1
R/WO-1
—
LPT1OSC
T1DIG
FOSC2
FOSC1
FOSC0
bit 0
Legend:
R = Readable bit
WO = Write-Once bit
-n = Value when device is unprogrammed
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
IESO: Two-Speed Start-up (Internal/External Oscillator Switchover) Control bit
1 = Two-Speed Start-up enabled
0 = Two-Speed Start-up disabled
FCMEN: Fail-Safe Clock Monitor Enable bit
1 = Fail-Safe Clock Monitor enabled
0 = Fail-Safe Clock Monitor disabled
Unimplemented: Read as ‘0’
LPT1OSC: T1OSC/SOSC Power Selection Configuration bit
1 = High-power T1OSC/SOSC circuit selected
0 = Low-power T1OSC/SOSC circuit selected
T1DIG: T1CKI for Digital Input Clock Enable bit
1 = T1CKI is available as a digital input without enabling T1OSCEN
0 = T1CKI is not available as a digital input without enabling T1OSCEN
FOSC<2:0>: Oscillator Selection bits
111 = ECPLL OSC1/OSC2 as primary; ECPLL oscillator with PLL enabled; CLKO on RA6
110 = EC OSC1/OSC2 as primary; external clock with FOSC/4 output
101 = HSPLL OSC1/OSC2 as primary; high-speed crystal/resonator with software PLL control
100 = HS OSC1/OSC2 as primary; high-speed crystal/resonator
011 = INTPLL1 internal oscillator block with software PLL control; FOSC/4 output
010 = INTIO1 internal oscillator block with FOSC/4 output on RA6 and I/O on RA7
001 = INTPLL2 internal oscillator block with software PLL control and I/O on RA6 and RA7
000 = INTIO2 internal oscillator block with I/O on RA6 and RA7
DS39933D-page 328
 2010 Microchip Technology Inc.