topic Re: How maximum FPC cable distance should I use for MIPI DSI LCD ? in i.MX Processors

How maximum FPC cable distance should I use for MIPI DSI LCD ?

talel_hajsalem — Mon, 06 Dec 2021 17:32:01 GMT

Hello,

I'm working on a custom IMX8MM board, and I have an LCD display.

when using a 5cm FPC cable and its working, but when using 10cm or 20cm it does not work.

If I decrement the pixel clock it sometimes work.

How maximum length should I don't pass?

Thanks,

Talel

igorpadykov — Mon, 06 Dec 2021 23:35:06 GMT

Hi Talel

cable length depends on many factors, including cable material, signal losses in board/cable and

connectors, impedance matching, so I am afraid there is no simple formula to calculate.

One can try to find it experimentally controlling signal quality by oscilloscope or try to perform ibis modelling.

Best regards
igor