VN9D5F20F SPI error problem

[FPros.1]

Hi everyone,

I am implementing the communication between MCU SPC582B and High side driver VN9D5D20F.

SPI signals seem fine to me, see next image:

Spi Clk frequency = 625kHz  (range is 0Mhz to 8Mhz)
CS transaction time = 71us
Time between bytes = 7us

Transaction 1 = read CTRL (en = 1, parity = 1, GSBN = 1)
Transaction 2 = read SOCR (all zeroes, GSBN = 1)
Transaction 3 = GSB = 20h (SPIE = 1)

On the third transaction, I can't understand why reading SOCR register cause the driver to throw the SPI error (clk count is adequate and SDI is not stuck.

I can't figure out what I am doing wrong.

Any help would be very much appreciated.

Thanks,

FP

[FPros.1 · Accepted solution]

I was not specifying correctly the parity bit during transmission.

The parity bit had to be computed based on the first 23 bit of the frame.

Regards,

FP