MC33664 conected to MC33771 or MCU by SPI

[wenfengyao]

Regarding the above picture, I have the following questions
1. Why are SPI_TX and SCLK_TX the same line?
2. Should there be SPI_RX not shown in this diagram?
3. If I connect two MC33664, does SPI DATA need two wires or can I use the same wire?

[wenfengyao]

Thank you for your help

[JozefKozon · Accepted solution]

Dear Jacky,

the Figure 38. in the MC33771C datasheet is incorrect. For the connection of the loop-back daisy chain please refer to the Figure 2. in the UM11334. Please also refer to this link. You might find it useful.

With Best Regards,

Jozef