-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Somebody in the thread at some point said: > Andy Green wrote: >> Obviously this can affect WLAN module state which is supplied by IO_3V3, >> although GSM doesn't seem to use IO_3V3 any may be fine with it. > > Hmm, we have an awful lot of things hanging off IO_3V3. Are you > sure none of them go crazy when you lower their supply that much ?
I'm not even sure they don't go crazy when given 3.3V :-) > It would certainly be a very nice saving. But running half the > board way out of specs sounds quite radical to me. Actually the list of IO_3V3 customers is knowable: - CPU IO voltage (separate from core voltage) - CPU RTC rail for some reason - CPU ADC rail - DVCC_CODEC - Audio AMP - USB Host pwr control - LCM - Motion sensor IO (not core) - Glamo IO (not core) - WLAN module power Plus various static pullups on Open Drain lines not being used at that time. Its a continuum -- we can pull it to 3.0V okay because that is inside +/- 10%. What happens at 2.7, at 1.8... shouldn't we test it? :-) - -Andy -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFHtYzSOjLpvpq7dMoRAkZCAJ4kaTV+CcvHbCHwp1JrwTNeS/0WXQCfQqRu S9pjWd+HRYmEeGLv25niMEY= =YcDt -----END PGP SIGNATURE-----
