Modify STM32MP157A dev kit with STM32MP151C

CharlesBlanchard · ‎2020-11-17

Hello,

No dev kit is available for STM32MP151x microprocessors, do you know if it is possible to replace the STM32MP157 chip by a STM32MP151 one on the STM32MP157A-DK1 ?

I have read that STM32MP1 are pin to pin compatible, but I want to be sure and if someone has already done this, that would be interesting.

Thank you in advance.

Charles Blanchard

PatrickF · ‎2020-11-17

Hi,

I confirm the pin compatibility, we internaly use sockets on MB1263C (STM32MP157C-EV1 Eval board) to allo testing other references.

Note that for the sake of SW usage, some OTP are burnt (to know which ST board it is, to define the MAC address), so changing the device imply some SW tuning.

For HW point of view, it is certainly possible to replace the component, but unsoldering/resoldering a pitch 0.5 device without deterioration of PCB and side components is matter of specialist.

What is the purpose of replacing with STM32MP151 ? With minor SW adaptation (e.g. not using 2nd Cortex-A7 core and peripherals not available on MP151x), you could probably being able to use the STM32MP157A you already have as a STM32MP151A.

Another solution is trying to find a 3rd party SOM maker with the STM32MP15xx device you need.

Regards.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

View solution in original post

PatrickF · ‎2020-11-17

Hi,

I confirm the pin compatibility, we internaly use sockets on MB1263C (STM32MP157C-EV1 Eval board) to allo testing other references.

Note that for the sake of SW usage, some OTP are burnt (to know which ST board it is, to define the MAC address), so changing the device imply some SW tuning.

For HW point of view, it is certainly possible to replace the component, but unsoldering/resoldering a pitch 0.5 device without deterioration of PCB and side components is matter of specialist.

What is the purpose of replacing with STM32MP151 ? With minor SW adaptation (e.g. not using 2nd Cortex-A7 core and peripherals not available on MP151x), you could probably being able to use the STM32MP157A you already have as a STM32MP151A.

Another solution is trying to find a 3rd party SOM maker with the STM32MP15xx device you need.

Regards.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

CharlesBlanchard · ‎2020-11-17

Thank you for your reactive answer.

We have the resources to replace the components.

We need to evaluate the STM32MP151C in order to know if it is possible to replace the current MPU (not from ST) in our future designs. It imply porting our firmware to this platform so, in order to minimize risks, we would like to be as close as possible to the potential new MPU.

Thank you,

Best regards,