PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 240

• Manufacturer Part Number: PIC18F258
• Description: High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18FXX8
REGISTER 20-2:
DS41159B-page 238
bit 7
bit 6
bit 5-4
bit 3-0
Note:
ADFM: A/D Result Format Select bit.
1 = Right justified. Six (6) Most Significant bits of ADRESH are read as ’0’.
0 = Left justified. Six (6) Least Significant bits of ADRESL are read as ’0’.
ADCS2: A/D Conversion Clock Select bit (ADCON1 bits in bold)
Unimplemented: Read as '0'
PCFG3:PCFG0: A/D Port Configuration Control bits
Legend:
R = Readable bit
- n = Value at POR reset
ADCON1 REGISTER
A = Analog input D = Digital I/O
C / R = # of analog input channels / # of A/D voltage references
bit 7
<ADCS2>
ADCON1
Note:
PCFG
0000
0001
0010
0011
0100
0101
011x
1000
1001
1010
1011
1100
1101
1110
1111
R/W-0
ADFM
0
0
0
0
1
1
1
1
Shaded cells indicate channels available only on PIC18F4X8 devices.
AN7
On any device RESET, the port pins that are multiplexed with analog functions (ANx)
are forced to be analog inputs.
A
A
D
D
D
D
D
A
D
D
D
D
D
D
D
<ADCS1:ADCS0>
ADCS2
R/W-0
ADCON0
AN6
D
D
D
D
D
D
D
D
D
D
D
D
A
A
A
00
01
10
11
00
01
10
11
AN5
D
D
D
D
D
D
D
D
D
A
A
A
A
A
A
W = Writable bit
’1’ = Bit is set
U-0
—
Preliminary
AN4
D
D
D
D
D
D
F
F
F
F
F
F
F
F
A
A
A
A
A
A
A
A
A
OSC
OSC
OSC
RC
OSC
OSC
OSC
RC
(clock derived from the internal A/D RC oscillator)
(clock derived from the internal A/D RC oscillator)
/2
/8
/32
/4
/16
/64
V
V
V
V
V
V
V
V
V
U-0
AN3
—
REF
REF
REF
REF
REF
REF
REF
REF
REF
A
A
A
D
A
D
+
+
+
+
+
+
+
+
+
V
V
V
V
V
AN2
REF
REF
REF
REF
REF
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
A
A
A
A
D
D
D
A
A
D
PCFG3
R/W-0
-
-
-
-
-
Clock Conversion
AN1
A
A
A
A
A
A
D
A
A
A
A
A
A
D
D
PCFG2
R/W-0
AN0
D
A
A
A
A
A
A
A
A
A
A
A
A
A
A
 2002 Microchip Technology Inc.
V
AN3
AN3
AN3
AN3
AN3
AN3
AN3
AN3
AN3
V
V
V
V
V
REF
—
x = Bit is unknown
DD
DD
DD
DD
DD
PCFG1
R/W-0
+
V
AN2
AN2
AN2
AN2
AN2
V
V
V
V
V
V
V
V
V
REF
—
SS
SS
SS
SS
SS
SS
SS
SS
SS
-
PCFG0
R/W-0
C / R
8 / 0
7 / 1
5 / 0
4 / 1
3 / 0
2 / 1
0 / 0
6 / 2
6 / 0
5 / 1
4 / 2
3 / 2
2 / 2
1 / 0
1 / 2
bit 0