PIC18F4553 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F4553

28/40/44-Pin High-Performance, Enhanced Flash, USB Microcontrollers with 12-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC18F2458/2553/4458/4553

TABLE 1-2: PIC18F2458/2553 PINOUT I/O DESCRIPTIONS

Pin Name

Pin

Number Pin

SPDIP, Type

SOIC

Buffer

Type

Description

MCLR/VPP/RE3

MCLR

VPP

RE3

1

Master Clear (input) or programming voltage (input).

I

ST

Master Clear (Reset) input. This pin is an active-low

Reset to the device.

P

Programming voltage input.

I

ST

Digital input.

OSC1/CLKI

OSC1

CLKI

9

Oscillator crystal or external clock input.

I Analog Oscillator crystal input or external clock source input.

I Analog External clock source input. Always associated with pin

function OSC1. (See OSC2/CLKO pin.)

OSC2/CLKO/RA6

OSC2

CLKO

RA6

10

Oscillator crystal or clock output.

O

—

Oscillator crystal output. Connects to crystal or resonator in

Crystal Oscillator mode.

O

—

In select modes, OSC2 pin outputs CLKO 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: Alternate assignment for CCP2 when CCP2MX Configuration bit is cleared.

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

© 2007 Microchip Technology Inc.

Preliminary

DS39887B-page 9

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