MC33771-MC33772 - MC33664 SPI

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MC33771-MC33772 - MC33664 SPI

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SNL
Contributor I

Hello,

We are using 2th party MCU to communicate with MC33664 through SPI master and slave. 
On the slave side we are having a problem on reading the message. 

 if there is an method of dealing with this 3nS pulse between the two 5-byte  blocks of data returned from the 33771B. If we can increase the time in between or if we can remove the echo message complately. 
Our problem is we are not able to read the second response (we are able to read back the echo part but the second part of the response(meaningful part with data) we are not able to read back due to the SPI interface of the MCU we are using. 

Is there any method for removing this echo part from the responses?

thank you. 
(We have the NDA, We have the datasheets, we have the EVMs etc)

Slave.png

 

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Q_man
NXP Employee
NXP Employee

The MC33771B will always send a response to a write Request!

Q_man_0-1644918601100.png

There is no option to disable the response to change the timing.

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