• CH559 has more features and bigger flash size.
  • Support USB hub, two USB transceiver, one is normal speed (female A USB pin “DP DM” and micro USB), one is high speed (On board marked “HS USB, pin HP HM”).
  • All lead out pins.
  • On board power led, four programming leds IO P1.4-P1.7.
  • Fuse protection on input power pins 3.3V and 5V.
  • 2*3 jumper select 3.3V / 5V and ON/OFF, both 5V or 3.3V can work by chip.
  • Lead out pinheader 1×4: serial UART port, logic level complaint.
  • On board optional crystal reserved.
  • USB directly programming. To enter into flash bootloader mode, hold down PROG button, and press RESET button.
  • New version improve the USB part, and board layout

All documentation please find at CH55X wiki page or this page V2 , or customer github.

WCH CH55x Series:

Additional information

Weight 0.015 kg

2 reviews for CH559 USB MCU Mini DEV Board [CH55x Series]

  1. 5 out of 5 (verified owner)

    Used the board successfully with atc1441 CH559sdccUSBHost project from github to handle joystick input.

    The only minor issue with my boards is that the printed io silkscreen seem to be one pin off toward USB port side of the board. For example Uart at pin P3.1 (tx) and P3.0 (rx) must be plugged near io silkscreen P3.0 and P4.7

  2. 3 out of 5

    Chao (store manager)

    Hi, if there is any silk print readability problem, please take a look at here:
    Thank you!

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