Last year, WCH (Nanjing QinHeng Corp.)’s launched a CH55x family of microcontroller based on an 8-bit C51 core with a USB interface, and extra I/Os depending on the selected part number Electrodragon is now listing a tiny USB development board based on CH551 for $1.80, and the chip itself sells for as low as 1.60 RMB (0.25 USD) on Taobao. Specifications: MCU – WCH CH551 8-bit C51 micro-controller USB – 1x USB type A port I/Os – 18 through holes exposing all I/Os from the MCU including GPIOs, USB, 3.3V, 5V GND Misc – On-board power led, user LED (P3.0) Power – 5V via USB port (or pin?) You won’t need an external hardware – such as a USB to TTL board – to program the boards since the MCU supports USB. To enter into programming mode, short connect the two pins in the middle of the board (DL) with […]
$1.80 CH551 Mini Development Board Features 8-bit C51 Core, USB Interface, and I/Os
