STM32F405 RGT6 CAN bootloader cannot connect via STLINK-V3SET on certain batch with bootloader ID V3.1

[AngeloHS]

Hi,

Currently we are using STM32 CAN bootloader to program the flash. All was fine until we use this batch of STM32F405 RGT6 with bootloader ID V3.1.

We can not even use STLINK-V3SET and stm32cubeprogrammer to get communicate to this batch of chip. Really strange. Maybe fake chips?

While the early batch with bootloader ID V9.1 can communicate smoothly.

What is the different with this two batches? What can I do for this batch?

Thank you,

Angelo

The batch with this problem:

[Joe WILLIAMS]

Hi AngeloHS

This post has been escalated to the ST Online Support Team for additional assistance.   Should anyone else have a similar  question about Quality, please submit your request directly to the ST Online Support Team at https://my.st.com/ols

Regards

Joe

STMicro Support