A
Anonymous
Mar 12, 2026
Rating: 5/5
Reliable and Cheap
Bought five for our workshop. All programmed without issues. Good value.
Description
WCH CH559 Development Board, Learning Evaluation Board, 51 Development Board, USB Development Board, Android AOA
Reviews
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 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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