imx8m mini MIPI_CLK

[darcyxu]

imx8m mini output of Mipi_ CLK signal is not very stable like below，is it normal？

darcyxu_1-1617100054698.png

darcyxu_2-1617100186226.png

darcyxu_3-1617100222457.png

other CPU output MIPI_CLK is stable ， like below：

darcyxu_4-1617100279916.png

darcyxu_5-1617100337344.png

How to optimize and let imx8m Mini output stable signal？

[igorpadykov]

Hi Darcy

for stable signal it is necessary to check mipi layout described in sect.3.5. Trace impedance recommendations, sect.3.4.7. High-speed routing recommendations

i.MX 8M Mini Hardware Developer’s Guide

Also pay attention to attached mipi cables and connectors, they also should have proper

impedance matching.

Best regards
igor