DRV8243-Q1: SPI_ERR Reason

Joyce Gao

Part Number: DRV8243-Q1

Hi expert,

The part number is DRV8243SQRXYRQ1.

By sending 0x0C 0x01 from MCU(S32K142) to DRV8243-Q1, it sends back 0xC0 0x01 correctly. But if send 0x0C 0x01 using another MCU S32K144 as the same, it sends back 0xE1 0x01, which indicates that SPI_ERR happens. What could be the possible reason?

Thanks.

over 1 year ago

+1 Ryan Kehr over 1 year ago

TI__Guru 54665 points

Hello,

Please see this section in the datasheet. Frame error (SPI_ERR) will occur if there are not the proper amount of clock cycles for the transaction.

Regards,

Ryan

0 Joyce Gao over 1 year ago in reply to Ryan Kehr

TI__Intellectual 1340 points

Hi Ryan,

Thanks for the reply. I've checked the SDI & SDO & SCLK signals before and they didn't seem to show wrong amount clocks. But by re-initializing the MCU SPI, it worked correctly. Maybe there's something wrong with the MCU side. Many thanks.

Regards.

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DRV8243-Q1: SPI_ERR Reason