PIC18F2450/4450
TABLE 1-2:
PIC18F2450 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Number
Pin Buffer
Type Type
Pin Name
Description
PORTA is a bidirectional I/O port.
PDIP,
QFN
SOIC
RA0/AN0
RA0
2
3
4
27
28
1
I/O
I
TTL
Analog
Digital I/O.
Analog input 0.
AN0
RA1/AN1
RA1
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
6
2
3
I/O
I
I
TTL
Analog
Analog
Digital I/O.
Analog input 3.
A/D reference voltage (high) input.
AN3
VREF+
RA4/T0CKI/RCV
RA4
I/O
I
I
ST
ST
TTL
Digital I/O.
Timer0 external clock input.
External USB transceiver RCV input.
T0CKI
RCV
RA5/AN4/HLVDIN
RA5
7
4
I/O
TTL
Digital I/O.
AN4
HLVDIN
I
I
Analog
Analog
Analog input 4.
High/Low-Voltage Detect input.
RA6
—
—
—
—
See the OSC2/CLKO/RA6 pin.
Legend: TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
= Output
CMOS = CMOS compatible input or output
I
= Input
O
P
= Power
© 2006 Microchip Technology Inc.
Advance Information
DS39760A-page 13
MICROCHIP [ MICROCHIP ]
