Max seep of the SD slot?
Joerg Reisenweber
joerg at openmoko.org
Sat Jul 26 04:06:05 CEST 2008
Am Fr 25. Juli 2008 schrieb BlueStar88:
> What about fixing the rate on the sd-card side to far lower level, not
> only while ideling, even if accessing? Lets say 5MHz. Would it make any
> sense and would it decrase the clock noise significally enough, to be
> able to just ignore the hardware patch?
To add to Andy's prev comment, the noise isn't exactly relating to
clock-*speed* but rather to signal rise- and fall-time of the low-high-low
transitions. Those aren't affected by mere closck-speed, but actually are by
adding caps or changing drive-power.
Think of it like hitting a bell once a second or every 3 seconds doesn't
change the frequency or amplitude of the bell's tone itself.
Anyway fiddling with sd-clock-freq won't hurt, just report your results. Maybe
we find something unexpected ;-)
cheers
jOERG
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 194 bytes
Desc: This is a digitally signed message part.
Url : http://lists.openmoko.org/pipermail/community/attachments/20080726/c5fde529/attachment.pgp
More information about the community
mailing list