Microchip Technology DM164134 Hoja De Datos

© 2006 Microchip Technology Inc.

DS41159E-page 11

PORTA is a bidirectional I/O port.

RA0/AN0/C

VREF

RA0
AN0
C

VREF

2

2

19

3

I/O

I

O

TTL

Analog
Analog

Digital I/O.
Analog input 0.
Comparator voltage reference 
output.

RA1/AN1

RA1
AN1

3

3

20

4

I/O

I

TTL

Analog

Digital I/O.
Analog input 1.

RA2/AN2/V

REF

-

RA2
AN2
V

REF

-

4

4

21

5

I/O

I
I

TTL

Analog
Analog

Digital I/O.
Analog input 2.
A/D reference voltage 
(Low) input.

RA3/AN3/V

REF

+

RA3
AN3
V

REF

+

5

5

22

6

I/O

I
I

TTL

Analog
Analog

Digital I/O.
Analog input 3.
A/D reference voltage 
(High) input.

RA4/T0CKI

RA4

T0CKI

6

6

23

7

I/O

I

TTL/OD

ST

Digital I/O – open-drain when 
configured as output.
Timer0 external clock input.

RA5/AN4/SS/LVDIN

RA5
AN4
SS
LVDIN

7

7

24

8

I/O

I
I
I

TTL

Analog

ST

Analog

Digital I/O.
Analog input 4.
SPI™ slave select input.
Low-Voltage Detect input.

RA6

See the OSC2/CLKO/RA6 pin.

Legend: TTL = TTL compatible input 

CMOS = CMOS compatible input or output 

ST

= Schmitt Trigger input with CMOS levels 

Analog = Analog input 

I

= Input O

= Output 

P

= Power 

OD

= Open-Drain (no P diode to V

DD

)