i.MX6UL SPI signals strength

[surendrajadhav]

Hi,

I am using 4 SPI ports of i.MX6UL. These signals are travelling from CPU board to base board and approximate distance is 20 CM. Let me know if I need buffer IC to drive signals strength of SPI signals. SPI is running on 3.3V.

The max. operating frequency of SPI would be 26MHz.

Regards,

Surendra

[Yuri]

Hello,

  As usually, the situation depends on environment : how PCB traces
are implemented; what cable , connector is used. To be completely accurate,
You need to perform signals simulation to check their integrity.   
Buffers may be recommended in order to be fully on safe side.  

Have a great day,

Yuri

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[surendrajadhav]

Let me add few more things to above query.

The each SPI has only one slave connected to it. I also have provision to add buffer on base board.

Regards,

Surendra