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SPI bootloader (board to board) - not getting any acknowledgement form target board

AnoopYadav
Associate II

Hello ,

I am using STM32F411RE(host) device and STM32H7S3L8 as target board . I am using spi2 from host side and spi1 for target board, after putting my target board in boot mode i am running application from my host device , i can able to see on logic analyzer that synchonization byte(0x5A) is being send followed by dummy byte(0x00).

But i am not able to get any ACK or NACK.

I have done all the hardware connections as  shown in attachment.

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