PIC16F720-ESLASHML datasheet(50/244 Pages) MICROCHIP

50 / 244 page

PIC16F/LF720/721

DS41430A-page 50

 2010 Microchip Technology Inc.

6.1.4

PIN DESCRIPTIONS AND

DIAGRAMS

Each PORTA 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 A/D Converter (ADC), refer to the

appropriate section in this data sheet.

6.1.4.1

RA0/AN0/ICSPDAT

Figure 6-1 shows the diagram for this pin. This pin is

configurable to function as one of the following:

• a general purpose I/O

• an analog input for the ADC

• ICSP programming data (separate controls from

TRISA)

• ICD Debugging data (separate controls from

TRISA)

6.1.4.2

RA1/AN1/ICSPCLK

Figure 6-2 shows the diagram for this pin. This pin is

configurable to function as one of the following:

• a general purpose I/O

• an analog input for the ADC

• ICSP programming clock (separate controls from

TRISA)

• ICD Debugging clock (separate controls from

TRISA)

6.1.4.3

RA2/AN2/T0CKI/INT

Figure 6-3 shows the diagram for this pin. This pin is

configurable to function as one of the following:

• a general purpose I/O

• an analog input for the ADC

• external interrupt

• clock input for Timer0

The Timer0 clock input function works independently of

any TRIS register setting. Effectively, if TRISA2 = 0,

the PORTA2 register bit will output to the pad and Clock

Timer0 at the same time.

6.1.4.4

RA3/MCLR/VPP

Figure 6-4 shows the diagram for this pin. This pin is

configurable to function as one of the following:

• a general purpose I/O

• Master Clear Reset with weak pull-up

6.1.4.5

RA4/AN3/T1G/CLKOUT

Figure 6-5 shows the diagram for this pin. This pin is

configurable to function as one of the following:

• a general purpose I/O

• analog input for the ADC

• Timer1 gate input

• clock output

6.1.4.6

RA5/T1CKI/CLKIN

Figure 6-6 shows the diagram for this pin. This pin is

configurable to function as one of the following:

• a general purpose I/O

• Timer1 Clock input

• clock input

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