PIC18FXX8 Datasheet, PDF (13/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PIC18FXX8
TABLE 1-2: PIC18FXX8 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
PIC18F248/258 PIC18F448/458
SPDIP, SOIC PDIP TQFP PLCC
Pin
Type
Buffer
Type
Description
RA0/AN0/CVREF
RA0
AN0
CVREF
RA1/AN1
RA1
AN1
PORTA is a bidirectional I/O port.
2
2
19
3
I/O TTL
Digital I/O.
I Analog
Analog input 0.
O Analog
Comparator voltage reference
output.
3
3
20
4
I/O TTL
Digital I/O.
I Analog
Analog input 1.
RA2/AN2/VREF-
RA2
AN2
VREF-
RA3/AN3/VREF+
RA3
AN3
VREF+
RA4/T0CKI
RA4
T0CKI
4
4
21
5
I/O TTL
Digital I/O.
I Analog
Analog input 2.
I Analog
A/D reference voltage
(Low) input.
5
5
22
6
I/O TTL
Digital I/O.
I Analog
Analog input 3.
I Analog
A/D reference voltage
(High) input.
6
6
23
7
I/O TTL/OD Digital I/O – open-drain when
configured as output.
I
ST
Timer0 external clock input.
RA5/AN4/SS/LVDIN
7
RA5
AN4
SS
LVDIN
7
24
8
I/O TTL
Digital I/O.
I Analog
Analog input 4.
I
ST
SPI™ slave select input.
I Analog
Low-Voltage Detect input.
RA6
Legend:
TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
I = Input
P = Power
See the OSC2/CLKO/RA6 pin.
CMOS = CMOS compatible input or output
Analog = Analog input
O
= Output
OD = Open-Drain (no P diode to VDD)
 2004 Microchip Technology Inc.
DS41159D-page 11