Am I doing SPI connections and stitching vias correctly?

[tdengineer]

SPI trace length < 9mm



SPI Via size 0.3mm x 0.6mm



Stitching Ground Via Size 0.2mm x 0.4mm



I'm estimating .5ns or 500ps rise time



Frequency estimate 2-3 GHZ



I did the best I can I don't know if there is something I could be doing better.

I would like to reduce noise as much as possible.

very sensitive EEG signal electrode traces 10H distance away. 10H = 10x distance from spi trace to ground plane.

I heard Rick Hartley say 20H was necessary

 

[keyth72]

I found this post by searching to see any anyone mentioned Rick Hartley on this forum.. this just so happened to be a recent post! I don't know that many people on this forum are designing microcontroller boards and SPI connections, but I happen to be interested in this too. I haven't done any math on it, I've just been placing ground vias as "close" to signal vias as I can without violating manufacturing specifications. Is this for some kind of display?

Edit: Nvm saw a previous post with part numbers, 8 channel codec with wireless STM32? What are you up to?