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federico.massimi
Visitor II
January 9, 2023
Question

STLink V3 kit STDC14 connection.

  • January 9, 2023
  • 1 reply
  • 13026 views

Hi, I'm making a board on which I want to use the STDC14 connector of the STlink V3 programmer for the SWO interface of my MCU.

But I have some questions about the pinout, in the manual I find this table:

0693W00000Y7gU8QAJ.png1 - PIN 3 (T_VCC): this pin must be connected to the power supply of my board or is it a power supply that comes from stlinkv3? My board is powered externally, should I connect this pin to my board's VCC or should I leave it unconnected?

2 - PIN 11 (GNDDetect): I don't understand what this pin is for, should I connect it to the ground of my board or should I leave it unconnected?

Last question, where can I find a reference schematic for SWO interface with ESD protections and short circuit protections and all necessary protections?

Thanks in advance.

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    A
    AScha.3
    Super User
    January 9, 2023
    1. see " (2) " : connect, is input to sensing/test VCC on target; connect to target VCC .
    2. dont know why, its for sensing ground.  connect to target GND and pin 5, 7 GND to target.
    3. see: https://hackaday.io/project/179054-custom-st-link-v20-v21-v30

     

     

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