Am Mi 11. Juni 2008 schrieb Andy Green: > Somebody in the thread at some point said: > > |> to do the same, when setup and sequenced properly (on 8753 there are). > |> I'll come back with more, when I read about it in the amp's specs > |> eventually. Which audio output is it we talk about (hp, earphone, spk? > |> BT even? GTA01/02?) > > | It is the speaker output I have set when I suspend/resume so I suspected > | the speaker amp. > | > | Thanks for the info. Any help is greatly appreciated. > > WM8753 datasheet (p89) explicitly goes through the steps to power stuff > down without pops (was reading this yesterday), but it didn't bank on an > external amp in the way. You're meant to disable the output pins and > then kill Vref, then pull power. I guess we should do that and then > disable the external amp. I'll have a go at it.
I think we should shut down 4853 first, and start last. It will do whatever it's doing on power-up/down anyway. *IF* we would create plops on 8753, no need to have 4853 up and amplify them. Anyway I didn't look to the 4853 ds actually. But OTOH what could be in here? And if we would start 4853 first, or power down last, my anti-plop scheme from above is moot. /jOERG
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