-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Somebody in the thread at some point said: | On 8/19/08, Joerg Reisenweber <[EMAIL PROTECTED]> wrote: | |> This power removal is done by U1705, and it should relyably cut power when we |> disable IO_3V3 what is quite normal for shutoff. |> No special kernel action required. | | This is in a lot of cases a faulty assumtion.
When IO_3V3 goes down it goes down... the pcf50633 has special arrangement to bring down "off" regulators to 0V. IMO it doesn't make any harm to see MOSFET switches on the power rails to whole GSM side so there is no question. This was done on a previous prototype I saw in .tw, but the low Rdson switch they used had built-in currently limit (1.6A IIRC?) that got triggered at low temperature and highest TX setting destroying TX action. So they removed it from PA side... maybe we can bring this back in the future. - -Andy -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iEYEARECAAYFAkir2DIACgkQOjLpvpq7dMrYNACffNKw+ZnuFTDpXdPIKNmIR/UM WMwAnjJ5rqz5n2yoAlYtnTVp5QqX9D3I =yery -----END PGP SIGNATURE----- _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
