Haiwei Li LJD-51-XA+ User Manual

This product is a user manual for the LJD-51-XA+ type single chip microcomputer control system.

Haiwei Li LJD-51-XA+ User Manual - cover page
Brand
LJD-51-XA+型单片机控制系统
Category
Other Electronics
Document type
User Manual
Language
Chinese
Pages
9
File format
PDF
File size
97 KB
Published
09 March, 2012
Updated
30 September, 2023
MD5 checksum
D21848ACF06A7E7A912E83C69C2CFE4D
PDF
Haiwei Li LJD-51-XA+ User Manual PDF

About this manual

The LJD-51-XA+ control system is built around an 89S52‑compatible microcontroller and provides extensive I/O, serial communication and analog interfaces. It is intended for rapid prototyping, industrial control and educational projects, offering a compact board layout and built‑in software tools.

The manual describes the system architecture, pin assignments, power requirements, and step‑by‑step procedures for configuring ports, communication ports (RS232/RS485), LCD and printer interfaces, as well as troubleshooting tips. This manual is written in Chinese.

What's inside

  • Overview
  • Technical Specifications
  • Operating Principle
  • Hardware Interface Description
  • Power Supply and Voltage Levels
  • Pin Assignment and I/O Mapping
  • Communication Ports (RS232/RS485)
  • LCD and Printer Interfaces
  • Application Examples

Specifications

Serial ports2 independent RS232/RS485 ports
General‑purpose I/O40 I/O pins
Operating temperature-20 °C to +70 °C
Operating humidity5 % to 95 %
Board dimensions150 mm × 115 mm

Frequently asked questions

How many I/O pins are available on the board?

The board provides 40 general‑purpose I/O pins.

What communication interfaces are supported?

Two independent serial ports support RS232 and RS485, and a separate modem port can be added.

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