PIC18F23K20 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F23K20

28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology

Microchip Technology 

PIC18F2XK20/4XK20

TABLE 1-2: PIC18F2XK20 PINOUT I/O DESCRIPTIONS

Pin Name

Pin Number

Pin Buffer

PDIP,

SOIC

QFN

Type

Type

Description

MCLR/VPP/RE3

MCLR

VPP

RE3

1 26

Master Clear (input) or programming voltage (input)

I ST

Active-low Master Clear (device Reset) input

P

Programming voltage input

I ST

Digital input

OSC1/CLKIN/RA7

OSC1

CLKIN

RA7

9

6

Oscillator crystal or external clock input

I ST

Oscillator crystal input or external clock source input

ST buffer when configured in RC mode; CMOS otherwise

I CMOS External clock source input. Always associated with pin

function OSC1. (See related OSC1/CLKIN, OSC2/CLKOUT

pins)

I/O TTL

General purpose I/O pin

OSC2/CLKOUT/RA6

OSC2

CLKOUT

RA6

10 7

Oscillator crystal or clock output

O—

Oscillator crystal output. Connects to crystal or

resonator in Crystal Oscillator mode

O—

In RC mode, OSC2 pin outputs CLKOUT which has 1/4 the

frequency of OSC1 and denotes the instruction cycle rate

I/O TTL General purpose I/O pin

Legend: TTL = TTL compatible input

ST = Schmitt Trigger input with CMOS levels

O = Output

CMOS = CMOS compatible input or output

I

= Input

P

= Power

Note 1: Default assignment for CCP2 when Configuration bit CCP2MX is set.

2: Alternate assignment for CCP2 when Configuration bit CCP2MX is cleared.

DS41303G-page 16

 2010 Microchip Technology Inc.

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