●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
● - < 0.2 µA typical standby current
