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DEVICE OVERVIEW

This family offers the advantages of all PIC18 microcontrollers ¨C namely, high computational performance at an economical price ¨C with the addition of high-endurance, Enhanced Flash program memory. On top of these features, the PIC18F2423/2523/4423/4523 family introduces design enhancements that make these microcontrollers a logical choice for many high-performance, power-sensitive applications.

Power Management Features:

? Run: CPU on, Peripherals on

? Idle: CPU off, Peripherals on

? Sleep: CPU off, Peripherals off

? Ultra Low 50 nA Input Leakage

? Run mode Currents Down to 11 ¦ÌA Typical

? Idle mode Currents Down to 2.5 ¦ÌA Typical

? Sleep mode Current Down to 100 ¦ÌA Typical

? Timer1 Oscillator: 900 nA, 32 kHz, 2V

? Watchdog Timer: 1.4 ¦ÌA, 2V Typical

? Two-Speed Oscillator Start-up

Flexible Oscillator Structure:

? Four Crystal modes, up to 40 MHz

? 4x Phase Lock Loop (PLL) ¨C Available for Crystal and Internal Oscillators

? Two External RC modes, up to 4 MHz

? Two External Clock modes, up to 40 MHz

? Internal Oscillator Block:

- Fast wake from Sleep and Idle, 1 ¦Ìs typical

- 8 user-selectable frequencies, from 31 kHz to 8 MHz

- Provides a complete range of clock speeds, from 31 kHz to 32 MHz, when used with PLL

- User-tunable to Compensate for Frequency Drift

? Secondary Oscillator using Timer1 @ 32 kHz

? Fail-Safe Clock Monitor:

- Allows for safe shutdown if peripheral clock stops

Peripheral Highlights:

? 12-Bit, Up to 13-Channel Analog-to-Digital Converter module (A/D):

- Auto-acquisition capability

- Conversion available during Sleep mode

? Dual Analog Comparators with Input Multiplexing

? High-Current Sink/Source 25 mA/25 mA

? Three Programmable External Interrupts

? Four Input Change Interrupts

? Up to Two Capture/Compare/PWM (CCP) modules, One with Auto-Shutdown (28-pin devices)

? Enhanced Capture/Compare/PWM (ECCP) module (40/44-pin devices only):

- One, two or four PWM outputs

- Selectable polarity

- Programmable dead time

- Auto-shutdown and auto-restart

? Master Synchronous Serial Port (MSSP) module Supporting 3-Wire SPI (all four modes) and I2C? Master and Slave modes

? Enhanced USART module:

- Support for RS-485, RS-232 and LIN/J2602

- RS-232 operation using internal oscillator block (no external crystal required)

- Auto-wake-up on Start bit

- Auto-Baud Detect (ABD)