The ST-LINK/V2 is an in-circuit debugger and programmer for the STM8 and STM32 microcontroller families. The single wire interface module (SWIM) and JTAG/serial wire debugging (SWD) interfaces are used to communicate with any STM8 or STM32 microcontroller located on an application board.
Much similar in architecture for debugging, the ST-LINK/V2 and the ST-LINK/V2-ISOL share the same features like digital isolation between the PC and the target application board this allows to withstands voltages of up to 1000 Vrms.
Specifically the debugger incorporates the use of USB full-speed interface to communicate with the ST Visual Develop (STVD) or ST Visual Program (STVP) software for STM8 application,and use of the USB full-speed interface to communicate with Atollic, IAR, Keil or TASKING integrated development environments for STM32 applications.
Features

5 V power supplied by a USB connector
USB 2.0 full-speed-compatible interface
USB standard A to Mini- B cable
SWIM specific features

1.65 V to 5.5 V application voltage supported on SWIM interface
SWIM low-speed and high-speed modes supported
SWIM programming speed rate: 9.7 Kbytes/s in low speed and 12.8 Kbytes/s in high speed
SWIM cable for connection to the application via an ERNI standard vertical connector (ref: 284697 or 214017) or horizontal connector (ref: 214012)
SWIM cable for connection to the application via a pin header or a 2.54 mm pitch connector

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
JTAG cable for connection to a standard JTAG 20-pin pitch 2.54 mm connector
JTAG supported
SWD and serial wire viewer (SWV) communication supported

Direct firmware update feature supported (DFU)
Status LED which blinks during communication with the PC
Operating temperature 0 to 50 degree C
1000 Vrms high isolation voltage (ST-LINK/V2-ISOL only)

Relevant Resources:
ST-LINK/V2 User Manual
ST-LINK/V2 Brief
STs Official Weblink
FAQs:
Q: What microcontrollers are supported by the ST-LINK/V2 Programmer?
A: The ST-LINK/V2 Programmer supports STM8 and STM32 microcontrollers, providing programming, debugging, and flash memory management for these STMicroelectronics MCU families.
Q: What features does the ST-LINK/V2 Programmer offer?
A: The ST-LINK/V2 offers features such as in-circuit programming and debugging, live debugging, and access to STM32 and STM8 microcontroller flash memory for development and maintenance tasks.
Q: How do I connect the ST-LINK/V2 Programmer to my microcontroller?
A: You connect the ST-LINK/V2 Programmer to your microcontroller via the SWD (Serial Wire Debug) or JTAG interface for STM32, and the SWIM (Single-Wire Interface Module) for STM8, using the provided cables.
Q: What software is compatible with the ST-LINK/V2 Programmer?
A: The ST-LINK/V2 Programmer is compatible with STM32CubeIDE, STMCubeProgrammer, and other STM32 development tools, which provide the necessary features for programming and debugging.
Q: Can the ST-LINK/V2 Programmer be used for both development and production?
A: Yes, the ST-LINK/V2 Programmer can be used for both development and production environments, offering reliable tools for debugging and programming STM8 and STM32 microcontrollers in various stages of the product lifecycle.