On Wed, Aug 23, 2017 at 8:04 PM, Richard Wilbur <richard.wil...@gmail.com> wrote: > On Aug 22, 2017, at 10:09, Luke Kenneth Casson Leighton <l...@lkcl.net> wrote: >> SATA was on a very preliminary version of EOMA68. it was cut a long time >> ago. > > Sorry for bringing up old news.
ey no problem it's all interesting stuff >> MicroSD card reading (and other SD/MMC / SDIO compatible interfaces). >> i *think* it's a max datarate of 50mhz.... > > Sounds like SD0 is high-frequency single-ended > so it might warrant a ground shield trace--if there's room. there is... just! > But I would rather maintain the 15mil differential pair trace to any > other trace spacing because I'm guessing the coupling to > differential pairs will be small. (It is not parallel to differential > signals for a significant distance, is it?) nono - they run round the back of the vias (attached) - yellow, 6 lines. l.
_______________________________________________ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
