EMI test fail what are the possible ways to bring down the emi emission

[Jagath]

Whtat are major causes for emi emission.

during emi test we are getting spike about 3db at 180Mhz, The product has wifi, sdram, spi flash. the mcu Stm32f446zej has 24Mh crystal and system core clock is 180Mhz.

how to use Spread spectrum clock generator for reducing the emi emission. if any example projects to explain this will be usefull

Thank you

jagath

[Tesla DeLorean]

Thought they had an application note. Perhaps check with local FAE or sales rep to review design.

Look at supplies, how you route power. Watch for pins outputting clocks or data bits at high rates. Reduce speed/slew rate drive settings on pins and reduce based on loading rather than arbitrary frequency setting.​