TJA1145 SPI communication failure

[空心木头_mm]

Hello ：

      I am using the can transceiver TJA1145T，and I can not get the right response when I send a 0xfd to it，I am sure I have the right connection among the pins，when I monitored the SDO pin of the TJA1145T,  I found it copy the information I send to it from the pin SDI sometimes，why could this happen ？Can anyone help me？

best regrads！

[TomasVaverka]

Hello Mengmeng,

Do you have an oscilloscope to check if the timing and format of the SPI message is correct? 

A very common problem is that timing parameters are violated, so please make sure everything is in accordance with the following specs:

Best regards,

Tomas

[1971439734]

I have check the format, but i still can't read back the device id, any other solutions? please

[syfchao]

hello：

     I have the same problem? do you solve it ?