This is a Microchip Technology Inc. product manual that introduces the features and usage methods of 28/40/44 pin enhanced flash microcontroller PIC18F2423/2523/4423/4523.
The PIC18F2423, PIC18F2523, PIC18F4423 and PIC18F4523 are 28‑, 40‑ and 44‑pin enhanced‑flash microcontrollers that combine low‑cost performance with a rich set of peripherals. They include up to 13‑channel 12‑bit ADCs, multiple capture/compare/PWM modules, MSSP for SPI/I²C, and an enhanced USART supporting RS‑485, RS‑232 and LIN.
The document provides a complete description of device architecture, pin diagrams, power‑management options, memory organization, electrical characteristics, and package information. It also lists development support resources and contact details for Microchip technical assistance. This manual is written in Chinese.
| ADC channels | up to 13 |
|---|---|
| High/Low current | 25 mA / 25 mA |
| Programmable external interrupts | 3 |
| Input level‑change interrupts | 4 |
| Capture/Compare/PWM modules | up to 2 standard CCP, 1 ECCP (40/44‑pin) |
| Enhanced USART features | RS‑485, RS‑232, LIN 1.2 support |
| Idle mode current | 5.8 µA typical |
| Sleep mode current | 0.1 µA typical |
| Timer1 oscillator current | 1.8 µA at 32 kHz, 2 V |
| Watchdog timer programmable period | 4 ms to 131 s |
| Operating voltage range | 2.0 V to 5.5 V |
| Flash program memory endurance | 100 000 erase cycles |
| Data EEPROM endurance | 1 000 000 erase cycles |
| Data retention | 100 years typical |
The devices operate from 2.0 V up to 5.5 V.
It provides up to 13 channels of 12‑bit ADC.
Idle mode current is typically 5.8 µA.
The flash program memory supports up to 100 000 erase cycles.