PIC18F2480/2580/4480/4580
TABLE 1-3:
Pin Name
PIC18F4480/4580 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Number
Pin Buffer
Type Type
Description
PDIP QFN TQFP
PORTA is a bidirectional I/O port.
RA0/AN0/CVREF
RA0
2
19
19
I/O
I
O
TTL
Analog
Analog
Digital I/O.
Analog Input 0.
Analog comparator reference output.
AN0
CVREF
RA1/AN1
RA1
3
4
20
21
20
21
I/O
I
TTL
Analog
Digital I/O.
Analog Input 1.
AN1
RA2/AN2/VREF-
RA2
I/O
TTL
Digital I/O.
AN2
VREF-
I
I
Analog
Analog
Analog Input 2.
A/D reference voltage (low) input.
RA3/AN3/VREF+
RA3
5
22
22
I/O
TTL
Digital I/O.
AN3
VREF+
I
I
Analog
Analog
Analog Input 3.
A/D reference voltage (high) input.
RA4/T0CKI
RA4
6
7
23
24
23
24
I/O
I
TTL
ST
Digital I/O.
Timer0 external clock input.
T0CKI
RA5/AN4/SS/
HLVDIN
RA5
I/O
TTL
Analog
TTL
Digital I/O.
Analog Input 4.
SPI slave select input.
High/Low-Voltage Detect input.
AN4
SS
HLVDIN
I
I
I
Analog
RA6
RA7
See the OSC2/CLKO/RA6 pin.
See the OSC1/CLKI/RA7 pin.
Legend: TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
= Output
I2C = I2C™/SMBus input buffer
CMOS = CMOS compatible input or output
I
= Input
O
P
= Power
© 2009 Microchip Technology Inc.
DS39637D-page 19
MICROCHIP [ MICROCHIP ]
