I'm working with a PXA270 driving a small LCD, running CE 5, and we're trying to get the transition to deep sleep mode to look nice, rather than having the screen left with a nasty residual image.
LCD datasheets all recommend outputting a few frames of completely black or white data, but I can't think of any way around this without filling the frame buffer and somehow forcing windows to re-paint the screen on resume. Nasty.
I'm guessing that just disabling the LCD controller will stop it outputting anything at all, and so the LCD will be as stuck as it would be if you just disabled it or removed power.
Anybody got any bright ideas on this one?
Thanks and best regards,