DEVICE OVERVIEW

This document contains device specific information for the following four devices:

1. PIC18C242

2. PIC18C252

3. PIC18C442

4. PIC18C452

These devices come in 28-pin and 40-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.

The following two figures are device block diagrams sorted by pin count: 28-pin for Figure 1-1 and 40-pin for Figure 1-2. The 28-pin and 40-pin pinouts are listed in Table 1-2 and Table 1-3, respectively.

High Performance RISC CPU:

• C compiler optimized architecture/instruction set

   - Source code compatible with the PIC16CXX instruction set

• Linear program memory addressing to 2 Mbytes

• Linear data memory addressing to 4 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 interrupt on Address bit

• 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

   - DNL = ±1 LSb, INL = ±1 LSb

• Programmable Low Voltage Detection (LVD) module

   - Supports interrupt-on-low voltage detection

• Programmable Brown-out Reset (BOR)

Special Microcontroller Features:

• 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

• In-Circuit Serial Programming (ICSP™) via two pins

CMOS Technology:

• Low power, high speed EPROM technology

• Fully static design

• Wide operating voltage range (2.5V to 5.5V)

• Industrial and Extended temperature ranges

• Low power consumption