PIC18F2331/2431/4331/4431
REGISTER 21-6: ANSEL0: ANALOG SELECT REGISTER 0(1)
R/W-1
ANS7(2)
R/W-1
ANS6(2)
R/W-1
ANS5(2)
R/W-1
ANS4
R/W-1
ANS3
R/W-1
ANS2
R/W-1
ANS1
R/W-1
ANS0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
-n = Value at POR
bit 7-0
ANS<7:0>: Analog Input Function Select bits
Correspond to pins, AN<7:0>.
1= Analog input
0= Digital I/O
Note 1: Setting a pin to an analog input disables the digital input buffer. The corresponding TRIS bit should be set
for an input and cleared for an output (analog or digital). The ANSx bits directly correspond to the ANx pins
(e.g., ANS0 = AN0, ANS1 = AN1, etc.). Unused ANSx bits are read as ‘0’.
2: ANS7 through ANS5 are available only on PIC18F4331/4431 devices.
REGISTER 21-7: ANSEL1: ANALOG SELECT REGISTER 1(1)
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
R/W-1
ANS8(2)
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7-1
bit 0
Unimplemented: Read as ‘0’
ANS8: Analog Input Function Select bit(2)
1= Analog input
0= Digital I/O
Note 1: Setting a pin to an analog input disables the digital input buffer. The corresponding TRIS bit should be set
for an input and cleared for an output (analog or digital). The ANSx bits directly correspond to the ANx pins
(e.g., ANS8 = AN8, ANS9 = AN9, etc.). Unused ANSx bits are read as ‘0’.
2: ANS8 is available only on PIC18F4331/4431 devices.
2010 Microchip Technology Inc.
DS39616D-page 245
MICROCHIP [ MICROCHIP ]
