HAL_SPI_Receive with LSB LSB is always read as '0'

[YOkum.1]

Hello. I am trying to read ReRAM( FUJITSU: MB85AS4MT) by using HAL_SPI_Receive().

But the LSB is recognized as 0 even the reply from ReRAM is returning 1 to LSB.

(ex: '11111111' is recognized as '11111110', or '01010101''' is recognised '01010100' )

As far as I see the signals by the Oscilloscope, ReRAM returns the proper signal. I guess it is an STM32 board side problem. Could someone solve the issue?

System details

STM32F429 Discovery1

ReRAM : MB85AS4MT(ReRAM)

The picturs shows ReRAM read operation part, singal when ReRAM reply '11111111' but STM32 recognize it as '11111110' and my implementation.

Thank youvery much for your help.

[waclawek.jan · Accepted solution]

Maybe the Corrupted last bit of data and/or CRC, received in Master mode with delayed SCK feedback erratum?

How is OSPEEDR set for SPI_SCK pin?

JW

[YOkum.1]

Hello JW. Thank you for your reply.

The OSPEEDR set for SPI_SCK pin was "Low" as attached image.

After changing it to "Very High", it works properly. Thank you very much.