Microchip Technology DV164136 Data Sheet
PIC18F8722 FAMILY
DS39646C-page 272
© 2008 Microchip Technology Inc.
REGISTER 21-2:
ADCON1: A/D CONTROL REGISTER 1
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
VCFG1
VCFG0
PCFG3
PCFG2
PCFG1
PCFG0
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
Unimplemented: Read as ‘0’
bit 5-4
VCFG<1:0>: Voltage Reference Configuration bits
bit 3-0
PCFG<3:0>: A/D Port Configuration Control bits:
A/D V
REF
+
A/D V
REF
-
00
AV
DD
AV
SS
01
External V
REF
+
AV
SS
10
AV
DD
External V
REF
-
11
External V
REF
+
External V
REF
-
A = Analog input
D = Digital I/O
Note 1:
AN15 through AN12 are available only on 80-pin devices.
PCFG<3:0>
AN
1
5
(1
)
AN
1
4
(1
)
AN
1
3
(1
)
AN
1
2
(1
)
AN
1
1
AN
1
0
AN
9
AN
8
AN
7
AN
6
AN
5
AN
4
AN
3
AN
2
AN
1
AN
0
0000
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
0001
D
D
A
A
A
A
A
A
A
A
A
A
A
A
A
A
0010
D
D
D
A
A
A
A
A
A
A
A
A
A
A
A
A
0011
D
D
D
D
A
A
A
A
A
A
A
A
A
A
A
A
0100
D
D
D
D
D
A
A
A
A
A
A
A
A
A
A
A
0101
D
D
D
D
D
D
A
A
A
A
A
A
A
A
A
A
0110
D
D
D
D
D
D
D
A
A
A
A
A
A
A
A
A
0111
D
D
D
D
D
D
D
D
A
A
A
A
A
A
A
A
1000
D
D
D
D
D
D
D
D
D
A
A
A
A
A
A
A
1001
D
D
D
D
D
D
D
D
D
D
A
A
A
A
A
A
1010
D
D
D
D
D
D
D
D
D
D
D
A
A
A
A
A
1011
D
D
D
D
D
D
D
D
D
D
D
D
A
A
A
A
1100
D
D
D
D
D
D
D
D
D
D
D
D
D
A
A
A
1101
D
D
D
D
D
D
D
D
D
D
D
D
D
D
A
A
1110
D
D
D
D
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
D
D
D
D