To read MC33FS8530 register has a mistake.

[Henry_Mei]

Hi,

Have a good day.

When pulling up RSTB high 50ms+ on using FS8530, then reading SBC register, and finding that it couldn't always read out the data first. After to read second frame data, the data is normal. 

Could you help to check what causes this problem?

Br,
Henry Mei

[TomasVaverka]

Hi Henry,

I do not fully understand this question.

Could you monitor the traffic on the SPI bus & RSTB pin using an o-scope or a logic analyzer and share it here to better understand what is going on?

Do you see any difference if you read main and fail-safe registers?

Also please double check that your SPI timing corresponds to the timing characteristics specified in the datasheet.

Best regards,

Tomas

[Henry_Mei]

Hi Tomas,

Powering up the system, when reading the data first is always fail by FS8x_ReadRegister(), but reading the data secondly is normal. The customer wants to know what causes this question. 

Br,

Henry Mei