PIC18F252中文资料微芯科技数据手册PDF规格书

DEVICE OVERVIEW

This document contains device specific information for the following devices:

• PIC18F242 • PIC18F442

• PIC18F252 • PIC18F452

These devices come in 28-pin and 40/44-pin packages. The 28-pin devices do not have a Parallel Slave Port (PSP) implemented and the number of Analog-to Digital (A/D) converter input channels is reduced to 5. An overview of features is shown in Table 1-1.

High Performance RISC CPU:

• C compiler optimized architecture/instruction set

- Source code compatible with the PIC16 and PIC17 instruction sets

• Linear program memory addressing to 32 Kbytes

• Linear data memory addressing to 1.5 Kbytes

• Up to 10 MIPs operation:

- DC - 40 MHz osc./clock input

- 4 MHz - 10 MHz osc./clock input with PLL active

• 16-bit wide instructions, 8-bit wide data path

• Priority levels for interrupts

• 8 x 8 Single Cycle Hardware Multiplier

Peripheral Features:

• High current sink/source 25 mA/25 mA

• Three external interrupt pins

• Timer0 module: 8-bit/16-bit timer/counter with 8-bit programmable prescaler

• Timer1 module: 16-bit timer/counter

• Timer2 module: 8-bit timer/counter with 8-bit period register (time-base for PWM)

• Timer3 module: 16-bit timer/counter

• Secondary oscillator clock option - Timer1/Timer3

• Two Capture/Compare/PWM (CCP) modules.

CCP pins that can be configured as:

- Capture input: capture is 16-bit, max. resolution 6.25 ns (TCY/16)

- Compare is 16-bit, max. resolution 100 ns (TCY)

- PWM output: PWM resolution is 1- to 10-bit, max. PWM freq. @: 8-bit resolution = 156 kHz

10-bit resolution = 39 kHz

• Master Synchronous Serial Port (MSSP) module, Two modes of operation:

- 3-wire SPI™ (supports all 4 SPI modes)

- I2C™ Master and Slave mode

• Addressable USART module:

- Supports RS-485 and RS-232

• Parallel Slave Port (PSP) module

Analog Features:

• Compatible 10-bit Analog-to-Digital Converter module (A/D) with:

- Fast sampling rate

- Conversion available during SLEEP

- Linearity ≤ 1 LSb

• Programmable Low Voltage Detection (PLVD)

- Supports interrupt on-Low Voltage Detection

• Programmable Brown-out Reset (BOR)

Special Microcontroller Features:

• 100,000 erase/write cycle Enhanced FLASH program memory typical

• 1,000,000 erase/write cycle Data EEPROM memory

• FLASH/Data EEPROM Retention: > 40 years

• Self-reprogrammable under software control

• Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)

• Watchdog Timer (WDT) with its own On-Chip RC Oscillator for reliable operation

• Programmable code protection

• Power saving SLEEP mode

• Selectable oscillator options including:

- 4X Phase Lock Loop (of primary oscillator)

- Secondary Oscillator (32 kHz) clock input

• Single supply 5V In-Circuit Serial Programming™ (ICSP™) via two pins

• In-Circuit Debug (ICD) via two pins

CMOS Technology:

• Low power, high speed FLASH/EEPROM technology

• Fully static design

• Wide operating voltage range (2.0V to 5.5V)

• Industrial and Extended temperature ranges

• Low power consumption:

- < 1.6 mA typical @ 5V, 4 MHz

- 25 µA typical @ 3V, 32 kHz

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