DEVICE OVERVIEW

This family offers the advantages of all PIC18 microcontrollers – namely, high computational performance at an economical price – 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 μA Typical

• Idle mode Currents Down to 2.5 μA Typical

• Sleep mode Current Down to 100 μA Typical

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

• Watchdog Timer: 1.4 μA, 2V Typical

• Two-Speed Oscillator Start-up

Flexible Oscillator Structure:

• Four Crystal modes, up to 40 MHz

• 4x Phase Lock Loop (PLL) – 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 μs 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)