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How to use different CRCpolynomials for SPI Tx and SPI Rx?

WCarey
Associate III

I am using SPI CRC feature of STM32H563ZI.

My ST Master must transmit an 8 bit CRC with a polynomial 0x07.

It receives a 16 bit CRC from the slave (a different hardware). The ST Master must now compute a 16 bit CRC with polynomial 0x11021 and verify the received response's CRC.

Is this possible?

1 REPLY 1
WCarey
Associate III

Or is it possible to check the CRC on Rx (on the response received) only and disable transmission of CRC during Tx in the SPI CRC configuration?

Because for my master application, verifying received CRC from the slave is more important than transmitting CRC to the slave.