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descriptor data on PCM2706 self-powered
Hello TI support Team,
I made a first USB DAC with PCM2706, it's Bus-powered. I modified Device descriptor data and it's working perfectly.
The sound is good enough for me but sometimes with ASIO4ALL drivers i can heard some 'glitch' (one for about 2 hours of listening).
So I would like to build another one which is self-powered. But from the datasheet :
- PSEL : Power source select (LOW: self-power, HIGH: bus-power)
- A condition of PSEL pin = High and HOST pin = High is needed to modify the descriptor data.
- the descriptor data modification in self-powered configuration (PSEL = Low) is not supported.
It is really impossible to manage to configure device descriptor data in self-powered mode ?
Can we put PSEL High at start up, and PSEL Low after device configuration ?
Thanks for your response,
and thank you for your work.
The PSEL pin is not meant to be changed dynamically and TI cannot guarantee any performance if it is changed in this manner. Unfortunately descriptor changes are only able to be executed and guaranteed in bus-powered mode.
Do you think use the PCM2706 in self-powered mode will resolve my problem of 'glitch' ?
Or maybe there is another reason you know ?
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