ST Link V2 and V3 VS STM32G0B

[grisom13]

Hello,

I have a STM32G0B1KBU3N MCU for my USB-C PD board. I am a new with this so learning. I am currently finished assemble my own PCB and have some issue with programming the controller. I can program controller with ST link V3-minie but have Zero luck to go connect with ST LInk v2. Is my controller supports only V3 hardware? I saw in the Programmer menu with V2 hardware there is only 4 kHz frequency and V3 hardware offers 8 kHz (same as controller internal clock) am I right? Thank you.

 

[Karl Yamashita]

Show a schematic of your STM32 connections.  

[grisom13]

[mfgkw]

1. In your schematic I see no RST connection to the ST-Link 

2. Is the Jumper JP9 for 3.3V to ST-Link closed?

3. What do you mean with "St Link v2"? Is it a genuine ST-Link from ST or some fake "ST-Link v2 mini"?

[grisom13]

Hello,

1 - Yes, there is no RST on a schematic (didn't know its required). But the wire is added to RST pin on STM32. And here hence is a question: STM Programmer offers "Hardware reset". Is this with a manual Reset switch? Or I am missing something?

 

2 - Yes I put the jumper to my diagram because I didn't know if ST link supply power. When I found out its not the JP9 jumper was closed and I can see 3.3V in "Target voltage section"

 

3 - All product come from Mouser. So yes genuine. The V2 white plastic Programmer hardware can't connect to my STM32 chip. The V3-minie that is a bare PCB - I can connect to my SMT32 controller and upload firmware. Any ideas why V2 cant do the job? Thank you 

[Karl Yamashita]

So how did you connect the ST-Link V2 20-pin to your 4-pin header? You must have some sort of custom harness/adapter. Double check to be sure SWDIO and SWCLK are not swapped.