Datasheet

PIC12F752/HV752
DS41576B-page 50 Preliminary  2011 Microchip Technology Inc.
REGISTER 5-5: ANSELA: PORTA ANALOG SELECT REGISTER
U-0 U-0 R/W-1 R/W-1 U-0 R/W-1 R/W-1 R/W-1
— — ANSA5 ANSA4 — ANSA2 ANSA1 ANSA0
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 ANSA<5:4>: Analog Select Between Analog or Digital Function on Pin RA<5:4> bits
1 = Analog input. Pin is assigned as analog input
(1)
.
0 = Digital I/O. Pin is assigned to port or special function.
bit 3 Unimplemented: Read as ‘0’
bit 2-0 ANSA<2:0> Analog Select Between Analog or Digital Function on Pin RA<2:0> bits
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 5-6: WPUA: WEAK PULL-UP PORTA REGISTER
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — WPU5 WPU4 WPU3 WPU2 WPU1 WPU0
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 5-0 WPU<5:0>: Weak Pull-up Control bits
1 = Pull-up enabled
0 = Pull-up disabled
Note 1: Global RAPU
must be enabled for individual pull-ups to be enabled.
2: The weak pull-up device is automatically disabled if the pin is in Output mode (TRISA = 0).
3: The RA3 pull-up is enabled when configured as MCLR
in the Configuration Word, otherwise it is disabled
as an input and reads as ‘0’.