[Arm-netbook] EOMA68-A20 2.7.4 pre-production prototypes received and working

[mike.valk at gmail.com]

2017-06-15 21:01 GMT+02:00 Luke Kenneth Casson Leighton <lkcl at lkcl.net>:

> okaay so the HDMI connection isn't so hot on these 2.7.4 boards.  it
> works... but there is significant line-interference under certain
> circumstances, even for 720p50.  1080p60 there is huge amounts of
> interference resulting in green horizontal lines.  *sigh* i'll just
> have to have another go at the layout... blech.


How about having GND tracks parallel to each Tx/Rx pair. Creating a sink
for EM signals to drain into instead of crossing over.

---GND----0
---Tx------[ ]
---Rx------[ ]
---GND----0
---Tx------[ ]
---Rx------[ ]
---GND----o