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STLink-V3MINI usage - Printable Version

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STLink-V3MINI usage - vdaniel - 04-03-2021

I use STLink-V3MINI.  According to documentation, it needs VCC (3.3) from the target device to recognize it.

But I noticed that the ST-LINK utility recognizes the target even when VCC is not connected.

Is it possible for the EBlink to work in the same way, ignoring if the VCC presents or not?

Thus the necessary number of STlink connector pins will become 3 instead of 4.
For some miniature applications, it will be a great advantage.

vdaniel


RE: STLink-V3MINI usage - embitz - 05-03-2021

Jump wiring the VCC sense input at the dongle is no solution?


RE: STLink-V3MINI usage - vdaniel - 05-03-2021

(05-03-2021, 11:17 AM)embitz Wrote: Jump wiring the VCC sense input at the dongle is no solution?

Hi,

Unfortunately, STLink-V3MINI has not 5V or 3.3V outputs.  So nowhere to jump.

vdaniel


RE: STLink-V3MINI usage - john.rudolph.ee - 17-03-2021

(05-03-2021, 03:17 PM)vdaniel Wrote:
(05-03-2021, 11:17 AM)embitz Wrote: Jump wiring the VCC sense input at the dongle is no solution?

Hi,

Unfortunately, STLink-V3MINI has not 5V or 3.3V outputs.  So nowhere to jump.

vdaniel



RE: STLink-V3MINI usage - vdaniel - 17-03-2021

(17-03-2021, 02:53 AM)john.rudolph.ee Wrote:
(05-03-2021, 03:17 PM)vdaniel Wrote:
(05-03-2021, 11:17 AM)embitz Wrote: Jump wiring the VCC sense input at the dongle is no solution?

Hi,

Unfortunately, STLink-V3MINI has not 5V or 3.3V outputs.  So nowhere to jump.

vdaniel

As I understand you have shorted pin 3 (T_VCC input) to pin 5 (GND).
I do not think, that it is a good solution.


RE: STLink-V3MINI usage - embitz - 18-03-2021

I think that he is jumping the VDD from CN3 to the T_VCC which is what I meant.


According eevblog post:

CN3-1 VDD
CN3-2 PA14 (SWCLK)
CN3-3 GND
CN3-4 PA13 (SWDIO)

https://www.eevblog.com/forum/microcontrollers/st-linkv3/25/


RE: STLink-V3MINI usage - vdaniel - 18-03-2021

I could not find the CN3 pinout or another reference in the STLINK-V3MINI documentation.
Please place a link to it.


RE: STLink-V3MINI usage - vorosj - 26-03-2021

I built this 3d printed box for the v3 mini, with a 3.3V LDO and 2.54mm pin headers. The yellow jumper connects the 3.3V to VTRef.


RE: STLink-V3MINI usage - embitz - 27-03-2021

Nice!


RE: STLink-V3MINI usage - john.rudolph.ee - 27-03-2021

(26-03-2021, 05:36 AM)vorosj Wrote: I built this 3d printed box for the v3 mini, with a 3.3V LDO and 2.54mm pin headers. The yellow jumper connects the 3.3V to VTRef.

I have considered using an internal resistor to tie 3V3 to VTref so if you use the VTref pin to connect to a target at a lower voltage the VTref would still do its job.  I use a 6 pin TAG-CONNECT on my custom boards.
https://www.tag-connect.com/product-category/products/cables/6-pin-target