PIC16F707-ESLASHML datasheet(60/284 Pages) MICROCHIP

60 / 284 page

PIC16F707/PIC16LF707

DS41418A-page 60

Preliminary

 2010 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, I2C 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’.

ANSELC: PORTC ANALOG SELECT REGISTER

R/W-1

U-0

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.

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