own unique ID

[anhe-zhang]

Hi,

I am using STM32G0B1 MCU for my project. Is it true each STM32 IC has its own unique ID. For STM32G4 product has the UID facility. Is it 96-bit ID for all the stm32 families or is it different.

Which manual has to be referred for this?
If yes can I use that for serial number for the product.
Which memory location is it stored?
Can read that from IC and send it through UART?

Can anyone suggest.

Thanks

[TDK · Accepted solution]

The unique ID register on the STM32G0B1 can be read starting from 0x1FFF7590, per the reference manual:

STM32G0x1 advanced Arm®-based 32-bit MCUs - Reference manual

With HAL, you can read it using the following functions:

uint32_t w0 = HAL_GetUIDw0();
uint32_t w1 = HAL_GetUIDw1();
uint32_t w2 = HAL_GetUIDw2();

Most STM32 chips have a 96 bit unique ID like this. Although it varies.

Yes, you can use this as a serial number. It is unique for each chip.

Yes, you can read this and send it through UART.

[Amel NASRI]

Hi @anhe-zhang ,

More details about Unique ID of STM32 products can be found in the article How to obtain and use the STM32 96-bit UID and the associated discussion.

-Amel