The STLINK-V3MINI is a stand-alone debugging and programming mini probe for STM32 microcontrollers. The JTAG/SWD interfaces are used to communicate with any STM32 microcontroller located on an application board. The STLINK-V3MINI also provides a Virtual COM port interface allowing the host PC to communicate with the target microcontroller through one UART. The STLINK-V3MINI is a portable version, easyto-use debugger//programmer including STDC14 interface with its flat cable.
• Stand-alone probe • Approximately 15 x 30 mm high-density integration PCB • Delivered with 1.27 mm pitch STDC14 debug connector and STDC14 to STDC14 flat cable • Self-powered through a USB connector (Micro-B) • USB 2.0 high-speed compatible interface • Direct firmware update support (DFU) • JTAG / serial wire debugging (SWD) specific features: – 3 V to 3.6 V application voltage support and 5 V tolerant inputs – JTAG communication support – SWD and serial wire viewer (SWV) communication support • Virtual COM port (VCP) specific features: – 3 V to 3.6 V application voltage support on the UART interface and 5 V tolerant inputs – VCP frequency up to 15 MHz • Drag-and-drop Flash programming • Two color LEDs: communication, power • Includes STDC14 signals protection
https://www.st.com/content/st_com/en/products/development-tools/hardware-development-tools/hardware-development-tools-for-stm32/stlink-v3mini.html