On 10 August 2017 at 10:45, Luke Kenneth Casson Leighton lkcl@lkcl.net wrote:
crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Thu, Aug 10, 2017 at 9:38 AM, mike.valk@gmail.com mike.valk@gmail.com wrote:
2017-08-10 10:18 GMT+02:00 Luke Kenneth Casson Leighton lkcl@lkcl.net:
On Thu, Aug 10, 2017 at 9:01 AM, mike.valk@gmail.com mike.valk@gmail.com wrote:
2017-08-09 15:23 GMT+02:00 Luke Kenneth Casson Leighton <lkcl@lkcl.net
:
Make sure the'res as much solid GND on the layer above and below the traces, again shielding.
these are layer 1 and layer 6, and layer 2 and 5 are solid GND.
I was referring mostly to layer 3 and 4. The diff pair is either on 3 or 4.
no.
If it is on 3 a slab of GND should be on 4 and vice versa.
It's
- Vsuply + components
- Ground
- HF
- HF
- Ground
- Vsuply + componnents
Right?
no.
- SIG1 + components
- Ground
- SIG3
- POWR
- Ground
- SIG6 + componnents
this is what we have been using for our design more or less and that came with freescale reference design as well.
there's only 3 signal layers: 1, 3 and 6. there are NO HDMI diffpairs on layer 3. i'm not happy about the fact that i have to use vias *at all* but there's no choice: layer 1 the 24mhz XTAL and the PMIC are in the way, and when you get to the DC3 connector the signals *have* to go round the back (layer 6) anyway.
l.