Product Overview

The STC89C52RC core development board is a compact minimum system board for classic 51-series microcontrollers. Equipped with STC89C52RC main chip, onboard CH340 USB-to-serial circuit, supporting one-line power supply and program downloading via Micro USB interface. All IO ports are fully led out, integrated reset circuit, crystal oscillator circuit and power indicator circuit. Compatible with STC89 and STC12 series chips. It is the ideal experimental platform for beginners to learn 51 single-chip programming, electronic competition development and small embedded project production.

Core Product Advantages

1. Classic STC89C52RC 51 Microcontroller 8051 core, 8K Flash program memory, 512 bytes RAM, rich internal peripherals including timer, UART serial port, external interrupt. Wide user community, massive open-source routines, low learning threshold.
2. Onboard CH340 USB Serial Chip, Convenient Download Built-in CH340 chip, users only need to install the driver, then directly download programs through Micro USB cable, no extra serial downloader required.
3. Full IO Pin Out, Rich Expansion Potential All P0~P3 parallel ports, power and GND pins are led out via standard 2.54mm pin headers, easy to connect sensors, LCD screens, relays and other peripheral modules.
4. Complete Basic Peripheral Circuit Integrated manual reset button, power indicator LED, main crystal oscillator circuit, stable power filter circuit. Only need to connect USB cable to run normally after soldering pin headers.
5. Dual Chip Compatibility The hardware layout supports both STC89 series and STC12 series microcontrollers, users can replace the chip according to project demands.
6. Compact Size, Easy Embedding Small PCB form factor, reserved mounting holes, easy to embed into small experimental devices and DIY equipment. Comes with pin header accessories for soldering.

Full Technical Specifications

Parameter	Detailed Data
Main Chip	STC89C52RC (Compatible with STC89 / STC12 series)
Core Architecture	8051 8-bit microcontroller
Flash Memory	8K Bytes
RAM	512 Bytes
USB Serial Chip	CH340
Interface Type	Micro USB power & download; 2.54mm IO pin header
IO Resources	P0, P1, P2, P3 full pin breakout
Onboard Circuit	Reset circuit, crystal oscillator circuit, power indicator
Supply Voltage	DC 5V via Micro USB
PCB Version	V6.0
Accessories	Straight pin headers, female socket pin header

Operation Guide

1. Solder the pin headers to the board according to your usage needs.
2. Install CH340 driver on your computer.
3. Connect the board to PC with Micro USB cable, select the corresponding serial port in programming software.
4. Compile and download the 51 MCU program, press the RESET button to restart the chip after downloading.

Application Scenarios

• 51 single-chip microcomputer beginner learning & university electronic teaching experiment
• Electronic competition preliminary control core, smart car, sensor acquisition project
• Small embedded DIY projects, intelligent light, temperature and humidity monitoring controller
• Product prototype verification, simple industrial automatic control module development

Important Notes

1. The IO port level is 5V, do not directly connect 3.3V device signal without level conversion, to avoid chip damage.
2. Do not short-circuit VCC and GND pins during wiring.
3. The pin headers need to be soldered manually by users.
4. Different batches of PCB silkscreen may have minor differences, which will not affect function.