Key facts
- Manuals
- 1
- Languages
- ZH
- Last added
- 2012-03-09
Featured LJD-51-XA+型单片机控制系统 manuals

Haiwei Li LJD-51-XA+ User 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.
Covers: Overview · Technical Specifications · Operating Principle · Hardware Interface Description · Power Supply and Voltage Levels · Pin Assignment and I/O Mapping
Latest LJD-51-XA+型单片机控制系统 manuals
Haiwei Li LJD-51-XA+ User Manual
User Manual 9 pages · 97 KB · ZHUser manual for the LJD-51-XA+ microcontroller control system by Haiwei Li, covering hardware features, connections and operation.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in LJD-51-XA+型单片机控制系统 manuals
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.
