PIC18F258 Datasheet, PDF (13/384 Pages) Microchip Technology – High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN

PIC18FXX8
TABLE 1-2: PIC18FXX8 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
RA0/AN0/CVREF
RA0
AN0
CVREF
RA1/AN1
RA1
AN1
Pin Number
PIC18F248/258 PIC18F448/458
SPDIP, SOIC PDIP TQFP PLCC
Pin
Type
2
2
19
3
I/O
I
O
3
3
20
4
I/O
I
Buffer
Type
Description
PORTA is a bi-directional I/O port.
TTL
Analog
Analog
Digital I/O.
Analog input 0.
Comparator voltage reference
output.
TTL
Analog
Digital I/O.
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 =
ST =
I=
P=
TTL compatible input
Schmitt Trigger input with CMOS levels
Input
Power
See the OSC2/CLKO/RA6 pin.
CMOS =
Analog =
O
=
OD =
CMOS compatible input or output
Analog input
Output
Open Drain (no P diode to VDD)
 2002 Microchip Technology Inc.
Preliminary
DS41159B-page 11