RM-801; RM-819 (Nokia Lumia 800) 
 
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Internal audio 
The internal audio components are used in these modes 
 
 
FM radio interface 
RM-801 supports FM RDS, I2C is the control bus from QTR8215. The line-up signal provides an analogue signal 
toQTR8215. 
 
Output music to ear-piece or loud speaker.