PIC18F242 MICROCHIP [Microchip Technology], PIC18F242 Datasheet - Page 12

• Manufacturer Part Number: PIC18F242
• Description: 28/40-pin High Performance, Enhanced FLASH Microcontrollers with 10-Bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18FXX2
TABLE 1-2:
DS39564C-page 10
MCLR/V
NC
OSC1/CLKI
OSC2/CLKO/RA6
RA0/AN0
RA1/AN1
RA2/AN2/V
RA3/AN3/V
RA4/T0CKI
RA5/AN4/SS/LVDIN
RA6
Legend: TTL = TTL compatible input
MCLR
V
OSC1
CLKI
OSC2
CLKO
RA6
RA0
AN0
RA1
AN1
RA2
AN2
V
RA3
AN3
V
RA4
T0CKI
RA5
AN4
SS
LVDIN
REF
REF
Pin Name
PP
PP
-
+
ST = Schmitt Trigger input with CMOS levels
O = Output
OD = Open Drain (no P diode to V
REF
REF
-
+
PIC18F2X2 PINOUT I/O DESCRIPTIONS
Pin Number
DIP
10
—
1
9
2
3
4
5
6
7
SOIC
10
—
1
9
2
3
4
5
6
7
Type
Pin
I/O
I/O
I/O
I/O
I/O
I/O
I/O
—
O
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
DD
Analog
Analog
Analog
Analog
Analog
Analog
ST/OD
Analog
Analog
Buffer
CMOS
)
Type
TTL
TTL
TTL
TTL
TTL
TTL
ST
ST
ST
ST
ST
—
—
—
Master Clear (input) or high voltage ICSP programming
enable pin.
These pins should be left unconnected.
Oscillator crystal or external clock input.
Oscillator crystal or clock output.
PORTA is a bi-directional I/O port.
Digital I/O.
Analog input 1.
Digital I/O.
Analog input 2.
A/D Reference Voltage (Low) input.
Digital I/O.
Analog input 3.
A/D Reference Voltage (High) input.
Digital I/O. Open drain when configured as output.
Timer0 external clock input.
Digital I/O.
Analog input 4.
SPI Slave Select input.
Low Voltage Detect Input.
See the OSC2/CLKO/RA6 pin.
Master Clear (Reset) input. This pin is an active low
RESET to the device.
High voltage ICSP programming enable pin.
Oscillator crystal input or external clock source input.
ST buffer when configured in RC mode, CMOS otherwise.
External clock source input. Always associated with
pin function OSC1. (See related OSC1/CLKI,
OSC2/CLKO pins.)
Oscillator crystal output. Connects to crystal or
resonator in Crystal Oscillator mode.
In RC mode, OSC2 pin outputs CLKO which has 1/4
the frequency of OSC1, and denotes the instruction
cycle rate.
General Purpose I/O pin.
Digital I/O.
Analog input 0.
CMOS = CMOS compatible input or output
I = Input
P = Power
Description
© 2006 Microchip Technology Inc.