PIC18F1220ESLASHSSSQTP datasheet(7/308 Pages) MICROCHIP

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DS39605F-page 5

PIC18F1220/1320

1.0

DEVICE OVERVIEW

This document contains device specific information for

the following devices:

This family offers the advantages of all PIC18 microcon-

trollers – namely, high computational performance at an

economical price – with the addition of high endurance

Enhanced Flash program memory. On top of these fea-

tures, the PIC18F1220/1320 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 PIC18F1220/1320 family incor-

porate 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 are

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.

• Lower Consumption in Key Modules: The power

requirements for both Timer1 and the Watchdog

Timer have been reduced by up to 80%, with typical

values of 1.1 and 2.1

μA, respectively.

1.1.2

MULTIPLE OSCILLATOR OPTIONS

AND FEATURES

All of the devices in the PIC18F1220/1320 family offer

nine 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 provides an

8 MHz clock (±2% accuracy) and an INTRC source

(approximately 31 kHz, stable over temperature and

VDD), as well as a range of 6 user-selectable clock

frequencies (from 125 kHz to 4 MHz) for a total of

8 clock frequencies.

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 internal oscillator. If a clock fail-

ure occurs, the controller is switched to the internal

oscillator block, allowing for continued low-speed

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. This allows for

code execution during what would otherwise be the

clock start-up interval and can even allow an appli-

cation to perform routine background activities and

return to Sleep without returning to full power

operation.

1.2

Other Special Features

• Memory Endurance: The Enhanced Flash cells for

both program memory and data EEPROM are rated

to last for many thousands of erase/write cycles –

up to 100,000 for program memory and 1,000,000

for EEPROM. Data retention without refresh is

conservatively

estimated

greater

than

40 years.

• Self-programmability: These devices can write to

their own program memory spaces under internal

software control. By using a bootloader routine

located in the protected Boot Block at the top of pro-

gram memory, it becomes possible to create an

application that can update itself in the field.

• Enhanced CCP module: In PWM mode, this

module provides 1, 2 or 4 modulated outputs for

controlling half-bridge and full-bridge drivers. Other

features include auto-shutdown, for disabling PWM

outputs on interrupt or other select conditions and

auto-restart, to reactivate outputs once the condition

has cleared.

• Enhanced USART: This serial communication

module features automatic wake-up on Start bit and

automatic baud rate detection and supports RS-232,

RS-485 and LIN 1.2 protocols, making it ideally

suited for use in Local Interconnect Network (LIN)

bus applications.

• 10-bit A/D Converter: This module incorporates

programmable acquisition time, allowing for a

channel to be selected and a conversion to be

initiated without waiting for a sampling period and

thus, reduce code overhead.

• Extended Watchdog Timer (WDT): This enhanced

version incorporates a 16-bit prescaler, allowing a

time-out range from 4 ms to over 2 minutes that is

stable across operating voltage and temperature.

• PIC18F1220

• PIC18F1320

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