What is the difference between ST-LINK and JTAG?

3 replies
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I read on the intenet that they both are used to debug the IC.

But how they differ?

thanks

This topic has been closed for replies.

S

Sarra.SBest answer

ST Employee

Hello @YShko.1,

ST-Link is a hardware debug probe

JTAG is a standard protocol.

ST-Link is used to debug STM32 microcontrollers while JTAG is a standard protocol used to debug a wide range of microcontrollers.

You can also refer to this AN4989 to learn more about it!

Hope that helps!

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S.Ma

Principal

ST-Link is a hardware debug probe, as J-Link and I-Jet.

Most debug probe support 2 type of debug bus, the standard JTAG and the Arm 2+ wire SWD interface. Some debug probe support additonal debug feature such as virtual port com, trace, etc....

YShko.1Author

Associate III

Hey,

So base on your answare ST-LINK is a hardware debug probe which has a JTAG bus?

S