Difference in utilization factor for STM32H753 and STM32H743

[DJ_IND]

Hi,

I am using STM32H743ZI Nucleo 144 board for one of my application. As per the observations I got the utilization factor with STM32H743 is 35% where as with STM32H752 it was 60%. We have not initialized any crypto or secure features on STM32H753 but still i can see drastic change in the utilization factor. Have you observed this before? Any suggestions to check? 

[KDJEM.1 · Accepted solution]

Hello @DJ_IND ;

Are you running the same firmware?

The STM32H753 and STM32H743 MCUs are pin to pin compatible. The difference that the STM32H753 provides the cryptographic HW acceleration features (CRYPT, AES, TDES, HMAC and HASH) while STM32H743 devices don't.

So, STM32H743 firmware can run on STM32H753.

Thank you.

Kaouthar