PIC18F2420 MICROCHIP [Microchip Technology], PIC18F2420 Datasheet - Page 18

• Manufacturer Part Number: PIC18F2420
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2420/2520/4420/4520
TABLE 1-3:
DS39631A-page 16
MCLR/V
OSC1/CLKI/RA7
OSC2/CLKO/RA6
Legend: TTL = TTL compatible input
Note 1: Default assignment for CCP2 when configuration bit CCP2MX is set.
MCLR
V
RE3
OSC1
CLKI
RA7
OSC2
CLKO
RA6
PP
2: Alternate assignment for CCP2 when configuration bit CCP2MX is cleared.
Pin Name
PP
ST = Schmitt Trigger input with CMOS levels
O
/RE3
= Output
PIC18F4420/4520 PINOUT I/O DESCRIPTIONS
PDIP
13
14
1
Pin Number
QFN TQFP
18
32
33
18
30
31
Type
Pin
I/O
I/O
O
O
P
I
I
I
I
Preliminary
Buffer
CMOS
Type
TTL
TTL
ST
ST
ST
—
—
CMOS = CMOS compatible input or output
I
P
Master Clear (input) or programming voltage (input).
Oscillator crystal or external clock input.
Oscillator crystal or clock output.
Master Clear (Reset) input. This pin is an active-low
Reset to the device.
Programming voltage input.
Digital input.
Oscillator crystal input or external clock source input.
ST buffer when configured in RC mode;
analog otherwise.
External clock source input. Always associated with
pin function OSC1. (See related OSC1/CLKI,
OSC2/CLKO pins.)
General purpose I/O pin.
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.
= Input
= Power
Description
 2004 Microchip Technology Inc.