Unable to Program My STM32G0B1

[Sakthi_Murugesan]

I tested PCB with BOOT_0 is Pulldown to gnd & not Pulldown to gnd & tested with both Stlink-V2 & J-Link Segger 

Even In Cube Programmer also it was not detected.
The MCU In this Board is STM32G0B1CET6 & it was bought in element14, this is the first time I try to program the MCU. 
I tried this for 5 PCBs all are having the same issues.

[SofLit]

Which board?

How you did connect st link? On board st link? External stlink? Stlink driver well installed?

Did you update the stlink firmware?

[Sakthi_Murugesan]

The Board which I am put this controller is coustom design which was design.
The st-link is External & I was update to latest version firmware.
The stlink & the jLink Segger is working for my other STM controller, Only this one is notworking.

[Tesla DeLorean]

Suggests the board design is NOT viable. Either connecting to wrong pins or not powered properly. 

Make sure VDDA is connected.

Provide salient portions of schematic. 

[SofLit]

Insufficient information.

You need to provide the schematics of your custom board so community members could help you efficiently.

[Sakthi_Murugesan]

 Here is the schematic for refence in The same design I used both STM32G0B1CBT6 & STM32G0B1CET6
The STM32G0B1CBT6 is working But with STM32G0B1CET6 not working I check in STMCUBEMX Both are pin compactable just memory size is different.

[Sakthi_Murugesan]

Did Anyone Face this kind of issue, or anyone have any solution for this?

[SofLit]

I don't see something suspecious in your schematics except the nRST pull-up resistor. No need for this resistor as there is one internal on the chip.

You can refer to the reference design provided by AN5096 / Figure 15. STM32G0 Series reference schematic:

The STM32G0B1CBT6 is working But with STM32G0B1CET6 not working I check in STMCUBEMX Both are pin compactable just memory size is different.

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This statement makes me having a doubt about the chip itself. It could be broken. Is there a possibility to desolder this chip and solder one you know that is working?

[SofLit]

Hello @Sakthi_Murugesan 

Did you solved your issue? if yes could you please tell us how? or Accept as Solution the comment that answered your question?

Thank you.

[Tesla DeLorean]

Get an endless stream of people with non-working custom boards here..

Solutions come from examining the situation in hand and testing, rather than me-too some anecdotes.

Failure to connect generally means the part is dead in the water for some reason, be it power, part orientation, shorts, misread documentation, incorrect/fake parts, etc.

That one type works and the other doesn't suggests more of a part issue.

Perhaps share a picture of the chip top marking, and the trace codes on the original ST packaging if available.