Microchip Technology MA180025 データシート
PIC18F87J90 FAMILY
DS39933D-page 290
2010 Microchip Technology Inc.
REGISTER 21-2:
ADCON1: A/D CONTROL REGISTER 1
R/W-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
TRIGSEL
—
VCFG1
VCFG0
PCFG3
PCFG2
PCFG1
PCFG0
bit 7
bit 0
Legend:
R = Readable bit
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
TRIGSEL: Special Trigger Select bit
1
= Selects the special trigger from the CTMU
0
= Selects the special trigger from the CCP2
bit 6
Unimplemented: Read as ‘0’
bit 5
VCFG1: Voltage Reference Configuration bit (V
REF
- source)
1
= V
REF
- (AN2)
0
= AV
SS
bit 4
VCFG0: Voltage Reference Configuration bit (V
REF
+ source)
1
= V
REF
+ (AN3)
0
= AV
DD
bit 3-0
PCFG<3:0>: A/D Port Configuration Control bits:
A = Analog input
D = Digital I/O
PCFG<3:0> AN11 AN10 AN9
AN8
AN7
AN6 AN5
AN4
AN3
AN2
AN1
AN0
0000
A
A
A
A
A
A
A
A
A
A
A
A
0001
A
A
A
A
A
A
A
A
A
A
A
A
0010
A
A
A
A
A
A
A
A
A
A
A
A
0011
A
A
A
A
A
A
A
A
A
A
A
A
0100
D
A
A
A
A
A
A
A
A
A
A
A
0101
D
D
A
A
A
A
A
A
A
A
A
A
0110
D
D
D
A
A
A
A
A
A
A
A
A
0111
D
D
D
D
A
A
A
A
A
A
A
A
1000
D
D
D
D
D
A
A
A
A
A
A
A
1001
D
D
D
D
D
D
A
A
A
A
A
A
1010
D
D
D
D
D
D
D
A
A
A
A
A
1011
D
D
D
D
D
D
D
D
A
A
A
A
1100
D
D
D
D
D
D
D
D
D
A
A
A
1101
D
D
D
D
D
D
D
D
D
D
A
A
1110
D
D
D
D
D
D
D
D
D
D
D
A
1111
D
D
D
D
D
D
D
D
D
D
D
D