PIC18F23K22-ESLASHML datasheet(13/496 Pages) MICROCHIP

13 / 496 page

 2010 Microchip Technology Inc.

Preliminary

DS41412C-page 13

PIC18(L)F2X/4XK22

1.0

DEVICE OVERVIEW

This document contains device specific information for

the following devices:

This family offers the advantages of all PIC18

microcontrollers

–

namely,

high

computational

performance at an economical price – with the addition

of high-endurance, Flash program memory. On top of

these

features,

the

PIC18(L)F2X/4XK22

family

introduces design enhancements that make these

microcontrollers a logical choice for many high-

performance, power sensitive applications.

1.1

New Core Features

1.1.1

nanoWatt TECHNOLOGY

All of the devices in the PIC18(L)F2X/4XK22 family

incorporate a range of features that can significantly

reduce power consumption during operation. Key

items include:

• Alternate Run Modes: By clocking the controller

from the Timer1 source or the internal oscillator

block, power consumption during code execution

can be reduced by as much as 90%.

• Multiple Idle Modes: The controller can also run

with its CPU core disabled but the peripherals still

active. In these states, power consumption can be

reduced even further, to as little as 4% of normal

operation requirements.

• On-the-fly Mode Switching: The power-

managed modes are invoked by user code during

operation, allowing the user to incorporate power-

saving ideas into their application’s software

design.

• Low Consumption in Key Modules: The

power requirements for both Timer1 and the

Watchdog Timer are minimized. See

Section 27.0 “Electrical Characteristics”

for values.

1.1.2

MULTIPLE OSCILLATOR OPTIONS

AND FEATURES

All of the devices in the PIC18(L)F2X/4XK22 family

offer ten different oscillator options, allowing users a

wide range of choices in developing application

hardware. These include:

• Four Crystal modes, using crystals or ceramic

resonators

• Two External Clock modes, offering the option of

using two pins (oscillator input and a divide-by-4

clock output) or one pin (oscillator input, with the

second pin reassigned as general I/O)

• Two External RC Oscillator modes with the same

pin options as the External Clock modes

• An internal oscillator block which contains a

16 MHz HFINTOSC oscillator and a 31 kHz

LFINTOSC oscillator, which together provide 8

user selectable clock frequencies, from 31 kHz to

16 MHz. This option frees the two oscillator pins

for use as additional general purpose I/O.

• A Phase Lock Loop (PLL) frequency multiplier,

available to both external and internal oscillator

modes, which allows clock speeds of up to

64 MHz. Used with the internal oscillator, the PLL

gives users a complete selection of clock speeds,

from 31 kHz to 64 MHz – all without using an

external crystal or clock circuit.

Besides its availability as a clock source, the internal

oscillator block provides a stable reference source that

gives the family additional features for robust

operation:

• Fail-Safe Clock Monitor: This option constantly

monitors the main clock source against a

reference signal provided by the LFINTOSC. If a

clock failure occurs, the controller is switched to

the internal oscillator block, allowing for continued

operation or a safe application shutdown.

• Two-Speed Start-up: This option allows the

internal oscillator to serve as the clock source

from Power-on Reset, or wake-up from Sleep

mode, until the primary clock source is available.

• PIC18F23K22

• PIC18LF23K22

• PIC18F24K22

• PIC18LF24K22

• PIC18F25K22

• PIC18LF25K22

• PIC18F26K22

• PIC18LF26K22

• PIC18F43K22

• PIC18LF43K22

• PIC18F44K22

• PIC18LF44K22

• PIC18F45K22

• PIC18LF45K22

• PIC18F46K22

• PIC18LF46K22

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