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Home / Development Boards & Control Boards / WCH CH559 Development Board, Learning Evaluation Board, 51 Development Board, USB Development Board, Android AOA
Development Boards & Control Boards

Attributes

Brand -
Category Electronic Components / Maker DIY / Development Boards & Control Boards
Origin -
Core Architecture Enhanced 8051 Compatible
Flash Memory 61 KB
SRAM 4 KB + 256 B
USB Interface Full-Speed USB 2.0
Operating Voltage 3.3V / 5V Compatible
Main Frequency Up to 24 MHz
GPIO Count 35 Programmable Pins
Special Feature Android AOA Support
Programming Method USB Bootloader
PCB Size 55mm x 25mm

5 reviews

A

Anonymous

Mar 12, 2026

Rating: 5/5

Reliable and Cheap

Bought five for our workshop. All programmed without issues. Good value.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Great for USB projects

The built-in USB makes this so much easier than adding external converters. Works well with SDCC.

A

Anonymous

Feb 18, 2026

Rating: 4/5

Good learning board

Solid board for learning 8051 architecture. Documentation could be better translated but manageable.

A

Anonymous

Feb 09, 2026

Rating: 4/5

Nice addition to collection

Compact design. Pinout is standard enough for breadboarding. Happy with purchase.

A

Anonymous

Feb 09, 2026

Rating: 5/5

Android AOA works!

Successfully tested the Android Open Accessory feature. Great for custom peripheral projects.

5 FAQ

Q: Can I power it via USB?

A: Yes, the board can be powered directly through the micro USB port.

Q: Which IDE works best?

A: We recommend using the WCH IDE or SDCC with a text editor.

Q: Where is the schematic?

A: You can download the schematic and datasheet from the manufacturer's website link provided in the description.

Q: Does it work with Mac OS?

A: Yes, drivers are available for Windows, Mac, and Linux.

Q: Is 5V tolerant?

A: Most GPIO pins are 5V tolerant, but please check the datasheet for specific pins.

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