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On Tue, Jan 16, 2018 at 9:06 PM, Richard Wilbur richard.wilbur@gmail.com wrote:
The goal is to avoid unnecessarily impeding this return current path. I'm trying to avoid making the path >~200mil and putting any major obstruction (like a huge layer void) in the way.
While browsing the A20 datasheet, I found that the HDMI section does have a power pin but not labelled the way I was asking you about.
ah ok
Page 18 mentions that VCC-HDMI is a power pin on ball #T13. On the schematic it is connected to net HVP which has power decoupling capacitor C108 which looks like "104" => 0.1uF.
yep. and a VIA to the other side (BOTTOM) C108 is about as close as you can possibly get
Looks like the path from the copper on layer 2 below the HDMI pins (balls #TUVW 22,23) on the SoC (processor) to the VCC-HDMI power pin (#T13) is ~300mil. It doesn't look overly impeded.
yehh it seems to work fine, on this design and on other boards.
l.