Datasheet

PIC16(L)F707
DS41418B-page 62  2010-2011 Microchip Technology Inc.
6.4.1 ANSELC REGISTER
The ANSELC register (Register 6-12) is used to
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELC bit high will cause all
digital reads on the pin to be read as ‘0’ and allow
analog functions on the pin to operate correctly.
The state of the ANSELC bits has no affect on digital
output functions. A pin with TRIS clear and ANSELC
set will still operate as a digital output, but the Input
mode will be analog. This can cause unexpected
behavior when executing read-modify-write instruc-
tions on the affected port.
6.4.2 PIN DESCRIPTIONS
Each PORTC pin is multiplexed with other functions. The
pins and their combined functions are briefly described
here. For specific information about individual functions
such as the SSP, I
2
C or interrupts, refer to the appropriate
section in this data sheet.
6.4.2.1 RC0/T1OSO/T1CKI/CPSB2
These pins are configurable to function as one of the
following:
• General purpose I/O
• Timer1 oscillator output
• Timer1 clock input
• Capacitive sensing input
6.4.2.2 RC1/T1OSI/CCP2/CPSB3
These pins are configurable to function as one of the
following:
• General purpose I/O
• Timer1 oscillator input
• Capture 2 input, Compare 2 output, and PWM2
output
• Capacitive sensing input
Note: The ANSELC register must be initialized
to configure an analog channel as a digital
input. Pins configured as analog inputs
will read ‘0’.
REGISTER 6-12: ANSELC: PORTC ANALOG SELECT REGISTER
R/W-1 R/W-1 R/W-1 U-0 U-0 R/W-1 R/W-1 R/W-1
ANSC7 ANSC6 ANSC5 — — ANSC2 ANSC1 ANSC0
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 7-5 ANSC<7:5>: Analog Select between Analog or Digital Function on Pins RC<7:5>, respectively
0 = Digital I/O. Pin is assigned to port or digital special function.
1 = Analog input. Pin is assigned as analog input
(1)
. Digital input buffer disabled.
bit 4-3 Unimplemented: Read as ‘0’
bit 2-0 ANSC<2:0>: Analog Select between Analog or Digital Function on Pins RC<2:0>, respectively
0 = Digital I/O. Pin is assigned to port or digital special function.
1 = Analog input. Pin is assigned as analog input
(1)
. Digital input buffer disabled.
Note 1: When setting a pin to an analog input, the corresponding TRIS bit must be set to Input mode in order to
allow external control of the voltage on the pin.
Note: CCP2 pin location may be selected as
RB3 or RC1.