PIC16F870-I/SP 查看數據表（PDF） - Microchip Technology
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PIC16F870-I/SP Datasheet PDF : 156 Pages
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PIC16F870/871
REGISTER 10-2: ADCON1 REGISTER (ADDRESS 9Fh)
U-0
U-0
ADFM
—
bit7
R/W-0
—
U-0
R/W-0
R/W-0
R/W-0
R/W-0
—
PCFG3 PCFG2 PCFG1 PCFG0
bit0
bit 7:
bit 6-4:
bit 3-0:
ADFM: A/D Result format select
1 = Right Justified. 6 most significant bits of ADRESH are read as ‘0’.
0 = Left Justified. 6 least significant bits of ADRESL are read as ‘0’.
Unimplemented: Read as ’0’
PCFG3:PCFG0: A/D Port Configuration Control bits
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
PCFG3: AN7(1) AN6(1) AN5(1) AN4
PCFG0 RE2 RE1 RE0 RA5
AN3
RA3
AN2
RA2
AN1
RA1
AN0
RA0
VREF+
VREF-
CHAN /
Refs(2)
0000
A
A
A
A
A
A
A
A
VDD
VSS
8/0
0001
A
A
A
A
VREF+
A
A
A
RA3
VSS
7/1
0010
D
D
D
A
A
A
A
A
VDD
VSS
5/0
0011
D
D
D
A
VREF+
A
A
A
RA3
VSS
4/1
0100
D
D
D
D
A
D
A
A
VDD
VSS
3/0
0101
D
D
D
D
VREF+
D
A
A
RA3
VSS
2/1
011x
D
D
D
D
D
D
D
D
VDD
VSS
0/0
1000
A
A
A
A
VREF+ VREF-
A
A
RA3 RA2
6/2
1001
D
D
A
A
A
A
A
A
VDD
VSS
6/0
1010
D
D
A
A
VREF+
A
A
A
RA3
VSS
5/1
1011
D
D
A
A
VREF+ VREF-
A
A
RA3 RA2
4/2
1100
D
D
D
A
VREF+ VREF-
A
A
RA3 RA2
3/2
1101
D
D
D
D
VREF+ VREF-
A
A
RA3 RA2
2/2
1110
D
D
D
D
D
D
D
A
VDD
VSS
1/0
1111
D
D
D
D
VREF+ VREF-
D
A
RA3 RA2
1/2
A = Analog input
D = Digital I/O
Note 1: These channels are not available on the PIC16F870.
2: This column indicates the number of analog channels available as A/D inputs and the numer of analog channels
used as voltage reference inputs.
DS30569A-page 80
Preliminary
© 1999 Microchip Technology Inc.
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