Please can anyone show me a register that identifies the family "STM32F10x" of the MCU? I'm not interesting for a Unique device ID register "U_ID".

despo.1 · ‎2022-11-21

Hello,

I would need a register that systematically identify the family type of the micro "STM32F103ZDT6".

In the reference manual there is the Unique device ID register, but it gives a unique identifier to the chip, I would like an identifier that would specify the family type of the MCU "STM32F10x".

Please can anyone show me a register that identifies the family "STM32F10x"?

Thank you for your support

Tesla DeLorean · ‎2022-11-21

Isn't there a DBGMCU DEVID register?

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Peter BENSCH · ‎2022-11-21

...called DBGMCU_IDCODE at address 0xE0042000

RM0008 also says:

This code is accessible using the JTAG debug port (four to five pins) or the SW debug port (two pins) ~~or by the user software~~. It is even accessible while the MCU is under system reset.

Edit: In all variants of the STM32F103, DBGMCU_IDCODE can only be read via the debug interface and not with user code; an attempt to read it with user code will then only result in 0x00, see:

STM32F101xC/D/E, STM32F103xC/D/E = ES0340
STM32F10xx8 STM32F10xxB = ES096
STM32F10xx4 STM32F10xx6 = ES0348

Regards

/Peter

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despo.1 · ‎2022-11-22

hi guys,

thanks for the response.

The goal is to differentiate the "STM32F103ZET6" from the "GD32F103ZET6" MCU. The MCUs have the same Device identifier at address 0xE0042000 (DEV_ID).

I think it is necessary to follow the JEDEC standard, but on the datasheet I can't find out the memory address that returns me the Manufacturer's Identification Code of the STMicroelectronics.

Could you kindly give me more information about this?

Where is located the JEDEC Manufacturer in the "STM32F103ZET6"?

Does it make sense to query JEDEC to differentiate STM from other manufacturers?

Peter BENSCH · ‎2022-11-22

There are several suggestions on the web for reading the Manufacturer ID Code according to JEDEC JEP106 and thus identifying the manufacturer, e.g.

Bluepill Diagnostics (intended for STM32F103C8, but should also be usable for F103ZE)
Investigations of the ROMTABLE of blaatschaap.be

Good luck!

/Peter

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