31 Jul
2012
31 Jul
'12
5:46 p.m.
On Sat, Jul 28, 2012 at 10:39:59PM +0800, Shawn Guo wrote:
On Fri, Jul 27, 2012 at 07:18:42PM +0800, Dong Aisheng wrote:
LINE_IN also needs VAG_POWER on or we may hear noise when directly route LINE_IN to Headphone Mux.
The following is what I see from sgtl5000 data sheet about VAG_POWER.
VAG is the internal voltage reference for the ADC and DAC.
Are you seeing any info that requires VAG_POWER in route of LINE_IN to Headphone Mux? Or it's only a result from your testing?
Given the name I rather suspect that's a datasheet error and the same reference is used by other bits of the chip. Just guessing, though.