GTA02 Power Glitch Reason Found
Andy Green
andy at openmoko.com
Tue Feb 5 11:52:48 CET 2008
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Somebody in the thread at some point said:
>> This net experiences a great deal of glitching and noise from the
>> missing decoupling, an example during boot is attached (which didn't
>> crash the thing!). This will easily explain all the crazy shutdown
>> behaviours.
> Greeeeeeat. I'll have this rework to try the charging logic.
> Previously, GTA02 would shutdown occasionally when inserting USB wall
> charger. Maybe this rework could fix this issue.
Its possible something else goes on with that issue additionally, but
for sure now the #1 suspect for any random shutdown failure we have ever
seen is the VB_SYS decoupling issue. If we're lucky a whole class of
troubling, hard to pin down power instability scenarios will just go
away now.
- -Andy
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (GNU/Linux)
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
iD8DBQFHqEAAOjLpvpq7dMoRAoj1AJoDSzSBn/pyaunmpiHmssveA0EYEwCeKBGy
CMK44QJTFRRQRZc2+dJdqzk=
=AzQU
-----END PGP SIGNATURE-----
More information about the openmoko-kernel
mailing list