PIC18LF4331 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF4331

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

Microchip Technology 

PIC18F2331/2431/4331/4431

TABLE 1-3: PIC18F4331/4431 PINOUT I/O DESCRIPTIONS

Pin Name

Pin Number

Pin Buffer

PDIP TQFP QFN Type Type

Description

MCLR/VPP/RE3

MCLR

VPP

RE3

1 18 18

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. Available only when MCLR is disabled.

OSC1/CLKI/RA7

OSC1

CLKI

RA7

13 30 32

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/CLKI, OSC2/CLKO

pins.)

I/O TTL General purpose I/O pin.

OSC2/CLKO/RA6

OSC2

CLKO

RA6

14 31 33

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 CLKO, which has 1/4 the

frequency of OSC1 and denotes the instruction cycle rate.

I/O TTL General purpose I/O pin.

Legend:

Note 1:

TTL = TTL compatible input

CMOS = CMOS compatible input or output

ST = Schmitt Trigger input with CMOS levels

I

= Input

O = Output

P

= Power

RC3 is the alternate pin for T0CKI/T5CKI; RC4 is the alternate pin for SDI/SDA; RC5 is the alternate pin

for SCK/SCL; RC7 is the alternate pin for SDO.

2: RD4 is the alternate pin for FLTA.

3: RD5 is the alternate pin for PWM4.

 2010 Microchip Technology Inc.

DS39616D-page 19

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