Datasheet

 2009-2011 Microchip Technology Inc. DS39960D-page 353
PIC18F87K22 FAMILY
REGISTER 23-2: ADCON1: A/D CONTROL REGISTER 1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
TRIGSEL1 TRIGSEL0 VCFG1 VCFG0 VNCFG CHSN2 CHSN1 CHSN0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 TRIGSEL<1:0>: Special Trigger Select bits
11 = Selects the special trigger from the RTCC
10 = Selects the special trigger from the Timer1
01 = Selects the special trigger from the CTMU
00 = Selects the special trigger from the ECCP2
bit 5-4 VCFG<1:0>: A/D V
REF+ Configuration bits
11 = Internal VREF+ (4.096V)
10 = Internal V
REF+ (2.048V)
01 = External V
REF+
00 = AV
DD
bit 3 VNCFG: A/D VREF- Configuration bit
1 =External VREF
0 =AVSS
bit 2-0 CHSN<2:0>: Analog Negative Channel Select bits
111 = Channel 07 (AN6)
110 = Channel 06 (AN5)
101 = Channel 05 (AN4)
100 = Channel 04 (AN3)
011 = Channel 03 (AN2)
010 = Channel 02 (AN1)
001 = Channel 01 (AN0)
000 = Channel 00 (AV
SS)