-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Somebody in the thread at some point said: > Hi Andy: > >> Also check all the supply rails like V-DBB, V-IO, V-FLASH (hmm), >> V_SRAM, V-SIM, V_RTC (hmm) and V-ABB to find ones that have >=1.8V >> in suspend, then try to remove any pullup to these rails, eg, if >> V-SIM has >= 1.8V, try to remove R1010 as a test. > > I power off GSM modem and set RX, TX, CTS, and RTS to output Low. The > VBAT is 0.004. V-DBB, V-IO, V-FLASH,V-SRAM,V-SIM,V-RTC,and V-ABB are > almost zero. I found total current is 4~5mA. It is better than before > (8~9mA).
Hi Allen - In my travels trying to understand another problem I came across R1519 on the CPU schematic -- it pulls TX_MODEM up by 10K to 3.3V. Do we really need this? We can save <=330uA if the GSM stuff is powered down by removing it. Hey it sounds like nothing but it is up to 6% of that 5mA suspend current. Plus it can be source of the 2V on GSM Vdd you were trying to track down? - -Andy -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFHqzLiOjLpvpq7dMoRAl61AJ4yfIOYVveIlmArA8R18C+CpwGilwCcCxXp e11VuXJa1DtKt8hlR9gdw38= =yHin -----END PGP SIGNATURE-----
