Skip to product information
1 of 3


CH55x reset controller

CH55x reset controller

Regular price €20,00 EUR
Regular price Sale price €20,00 EUR
Sale Sold out
Tax included.

The CH55x Reset Controller is a one-touch solution for putting WCH CH554 and CH552 microcontrollers into bootloader mode. The reset controller performs a simple sequence to achieve this:

  1. Disconnects both power and USB data lines from the device
  2. Connects a 10k resistor from 3.3V to the D+ USB line
  3. Connects the power and USB data lines to the device
  4. After a short delay, disconnects the 10k resistor from the device


  • This will only work with USB-powered CH55x devices, if the device has power from a battery or other power source, the CH55x will not reset
  • Connect the computer to the 'DUT IN' micro USB port
  • Connect your WCH CH55x device to the 'DUT OUT' USB A port
  • This board was designed to work with 3.3V powered CH55x devices. It may work with 5V powered devices, but this is untested.
  • The board includes a 'control in' connection for remotely controlling the bootloader sequence, however this is not supported in the software for the device.

The design files and firmware are available on GitHub

View full details