Audio

ADC/DAC

• TWL6040 integrated 4-channel DAC, 2-channel ADC, headphone and speaker amp, microphone preamp, and vibration driver using dedicated McPDM interface for communication with the OMAP5

Jack

• 3.5mm headset TRRS (stereo audio and microphone) connector with automatic switch to go from OMTP to CTIA as seen here

Hardware:

• TS3A227ERVAR - Autonomous Audio Accessory Detection and Configuration Switch
  • Detects 3-pole or 4-pole audio accessories (headphone / microphone) and configures internal switches to route the signals accordingly.
• FDV301N - N-channel MOSFET used to generate "PLUGDET" signal when headphone jack is inserted.
• CUI SJ-43516-SMT-TR - 4-contact, 3.5mm audio jack with tip and ring switches

Volume Wheel

• Potentiometer to GPIO input in SoC, 10-Bit Resolution (allows software override of volume control)

Microphone

• Microphone located at the left edge between keyboard and D-pad.

Speakers

• Stereo speakers in base with tuned cavity behind them as per manufacturers' recommendations.

Hardware:

• Seltech GR1813L025UN8 (or compatible)