PIC18F2420 MICROCHIP [Microchip Technology], PIC18F2420 Datasheet - Page 14

• 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 1-2:
DS39631A-page 12
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
PIC18F2420/2520 PINOUT I/O DESCRIPTIONS
PDIP,
SOIC
Pin Number
10
1
9
QFN
26
6
7
Type
Pin
I/O
I/O
O
O
P
I
I
I
I
CMOS
Buffer
Type
TTL
TTL
ST
ST
ST
—
—
Preliminary
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 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.
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.)
General purpose I/O pin.
CMOS = CMOS compatible input or output
I
P
= Input
= Power
Description
 2004 Microchip Technology Inc.