7Semi ST-LINK/V2.1 and ST-LINK/V2 Debugger Programmer USB, Original STM Chip

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The ST-LINK/V2.1 and ST-LINK/V2 from 7SEMI is a USB-based programmer and in-circuit debugger designed for STM32 microcontrollers. It allows developers to program and debug STM32 microcontrollers via the SWD (Serial Wire Debug) or JTAG (Joint Test Action Group) interfaces.. STM32 applications can communicate with the STM32CubeIDE software tool or third-party integrated development environments via the USB full-speed interface.

The ST-LINK/V2.1 and ST-LINK/V2 tool features a high-performance embedded ST-LINK/V2 server that supports firmware upgrade and allows the user to easily change the target MCU by simply connecting the corresponding adapter board. The tool supports a wide range of STM32 microcontrollers and is compatible with major third-party IDEs such as Keil, IAR, and Eclipse.

The ST-LINK/V2.1 and ST-LINK/V2 provides real-time debugging and allows developers to set breakpoints, step through code, and monitor variables in real-time. It also provides access to the MCU's memory and peripherals, which enables the user to analyze the behavior of the system and identify issues.

  • 500mA self-recover fuse to protect your USB Port
  • Original STM32 128KB memory chip 
  • Dual supply output 5V and 3V for external MCU.
  • Support VCP (Virtual COM port) for serial debugging 
  • Direct firmware update support (DFU)
  • Support fast output over dedicated Single Wire Output (SWO).
  • USB 2.0 full speed compatible interface.
  • JTAG/serial wire debugging (SWD) specific features 
    • 1.65 V to 3.6 V application voltage supported on the JTAG/SWD interface and 5 V tolerant inputs.
    • Supports JTAG communication. 
    • Supports serial wire debug (SWD) and serial wire viewer (SWV) communication.  
  • Status LED, which blinks during communication with the PC
  • Operating temperature from 0 to 50C 
Development Environment
The ST-LINK/V2.1 implementations embed an STM32 32-bit microcontroller based on the Arm Cortex‑M processor.
System requirements
Windows OS (7, 8 and 10), Linux 64-bit, or macOS
Development toolchains
  • STM32 microcontrollers
  • IAR Systems – EWARM (Windows Only)
  • Keil - MDK-ARM (Windows Only)
  • STMicroelectronics - STM32CubeIDE
  • STMicroelectronics - STM32CubeProgrammer (STM32CubeProg)
  • STMicroelectronics - STM32CubeMonitor
Related Software

ST-LINK/V2.1 Programmer Pinouts

Connection With Target MCU STM32/STM8


7SEMI ST-LINK Firmware upgrade instructions using STM32CubeProgrammer (Download)

ST-LINK/V2 is a versatile in-circuit debugger and programmer for the STM32 microcontroller families. It features a USB interface for communication with a host PC and a JTAG/SWD interface for connection to the target microcontroller. The ST-LINK/V2 supports a range of debugging features, including real-time variable watching, code stepping, and breakpoints. It also supports flash programming and erasing, as well as the ability to read and write memory and registers. With its compact size and easy-to-use interface, the ST-LINK/V2 is an essential tool for any developer working with STM32 microcontrollers.

Extra Information


Warranty Information

All the products supplied by Evelta are genuine and original. We offer 14 days replacement warranty in case of manufacturing defects. For more details, please visit our cancellation and returns page.