No battery Vsys issue is USB overcurrent?
andy at openmoko.com
Mon Jun 30 18:29:06 CEST 2008
-----BEGIN PGP SIGNED MESSAGE-----
Somebody in the thread at some point said:
| Am Mo 30. Juni 2008 schrieb Andy Green:
|> Somebody in the thread at some point said:
|> | I didn't see why it shouldn't be coincidence. The fact is we get a
|> | dropout on Vsys, keep adding caps you can stop it dipping below a
|> | critical level in the 30us. If you want to talk coincidence ;-) there
|> | is a third great story to explain it that didn't pan out: 30us is a
|> | commonly used filter period in pcf50633 and is also the duration of the
|> Of course 30us ~= 1/32kHz, we're saying it's for "one pcf clock" that
|> Vsys is disrupted -- probably highly significant if we can figure out
| So to proof this, you might change the RTC-crystal freq? Just an idea.
No need, everything that happens on there is synchronous to pcf50633
32kHz clock... these two in the pic are locked together.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
-----END PGP SIGNATURE-----
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 9741 bytes
Desc: not available
Url : http://lists.openmoko.org/pipermail/openmoko-kernel/attachments/20080630/7b5dfa91/attachment.gif
More information about the openmoko-kernel