PIC16F631_08 Datasheet, PDF (63/306 Pages) Microchip Technology – 20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F631/677/685/687/689/690
REGISTER 4-3: ANSEL: ANALOG SELECT REGISTER
R/W-1
ANS7
bit 7
R/W-1
ANS6
R/W-1
ANS5
R/W-1
ANS4
R/W-1
ANS3
R/W-1
ANS2
R/W-1
ANS1
R/W-1
ANS0
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 7-0
ANS<7:0>: Analog Select bits
Analog select between analog or digital function on pins AN<7:0>, respectively.
1 = Analog input. Pin is assigned as analog input⁽¹⁾.
0 = Digital I/O. Pin is assigned to port or special function.
Note 1: Setting a pin to an analog input automatically disables the digital input circuitry, weak pull-ups and
interrupt-on-change if available. The corresponding TRIS bit must be set to Input mode in order to allow
external control of the voltage on the pin.
REGISTER 4-4: ANSELH: ANALOG SELECT HIGH REGISTER⁽²⁾
U-0
—
bit 7
U-0
U-0
U-0
R/W-1
R/W-1
—
—
—
ANS11
ANS10
R/W-1
ANS9
R/W-1
ANS8
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 7-4
bit 3-0
Unimplemented: Read as ‘0’
ANS<11:8>: Analog Select bits
Analog select between analog or digital function on pins AN<7:0>, respectively.
1 = Analog input. Pin is assigned as analog input⁽¹⁾.
0 = Digital I/O. Pin is assigned to port or special function.
Note 1:
2:
Setting a pin to an analog input automatically disables the digital input circuitry, weak pull-ups and
interrupt-on-change if available. The corresponding TRIS bit must be set to Input mode in order to allow
external control of the voltage on the pin.
PIC16F677/PIC16F685/PIC16F687/PIC16F689/PIC16F690 only.
© 2008 Microchip Technology Inc.
DS41262E-page 61