WCH CH552T E8051 8-BIT USB MCU TSSOP-20 from Rabid's Electronics Emporium on Tindie
U-ec6 Usb Debug Adapter For C8051f Mcu Compatible With Ec3/ec5 Usb Emulator Downloader Programmer With Usb Cable Jtag Line - Instrument Parts & Accessories - AliExpress
CH552 CH554 USB MCU Mini DEV Board [CH55x Series] – ElectroDragon
Amazon.com: Aihjcnele Attiny85 Digispark Kickstarter USB Module Development Board Compatible IDE for Arduino General Micro USB MCU Development Module Compatible with UNO R3 PWM I2C SPI ADC I/O with Cable Wire :
USB iNode MCU USB microcontroller - NodeMCU ESP32 Botland - Robotic Shop
Oktava Shop - MCU-02 pro - USB large diaphragm condenser mic
Compact 8-bit MCU boards controlled/powered through USB connection
MCU Peripherals Tips Tricks for Using USB in Embedded Applications Part I | DigiKey
CH559 USB MCU Mini DEV Board [CH55x Series] – ElectroDragon
Mackie MCU Pro Expandable USB/MIDI Control Surface MCU PRO B&H
Automatic Mcu Stc 51 Microcontroller Downloader Auto Programmer / 3.3v 5v Universal / Dual Voltage Usb To Ttl Download Cable - Instrument Parts & Accessories - AliExpress
usb device - USB Full Speed driver with MCU in DIP package - Electrical Engineering Stack Exchange