Audio: Difference between revisions - Pyra Wiki

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==Jack==
<onlyinclude>
=== ADC/DAC ===
* [https://www.ti.com/lit/ds/symlink/twl6040.pdf 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 [https://en.wikipedia.org/wiki/OMTP OMTP] to [https://en.wikipedia.org/wiki/CTIA_%E2%80%93_The_Wireless_Association CTIA] as seen [https://en.wikipedia.org/wiki/Phone_connector_%28audio%29#TRRS_standards here]
* 3.5mm headset TRRS (stereo audio and microphone) connector with automatic switch to go from [https://en.wikipedia.org/wiki/OMTP OMTP] to [https://en.wikipedia.org/wiki/CTIA_%E2%80%93_The_Wireless_Association CTIA] as seen [https://en.wikipedia.org/wiki/Phone_connector_%28audio%29#TRRS_standards here]


==Volume Wheel==
Hardware:
* Potentiometer (or rotary encoder?) connected to general-purpose input in SoC (allows software override of volume control)
* [https://www.mouser.co.uk/ProductDetail/Texas-Instruments/TS3A227ERVAR?qs=%2Fha2pyFaduj3Cknap0145MPlxdRx5A2CetC%252Bo0d9of68d%2FCRevIM5w%3D%3D TS3A227ERVAR] - Autonomous Audio Accessory Detection and Configuration Switch
Source: https://pyra-handheld.com/boards/threads/were-still-alive.77184/page-15#post-1372429
** Detects 3-pole or 4-pole audio accessories (headphone / microphone) and configures internal switches to route the signals accordingly.
* [https://www.mouser.co.uk/ProductDetail/ON-Semiconductor-Fairchild/FDV301N?qs=%2Fha2pyFadujAYpqpxz9xOxyu2NXFF4PQT%2FJhMIZ7j6w%3D FDV301N] - N-channel MOSFET used to generate "PLUGDET" signal when headphone jack is inserted.
* [https://www.mouser.co.uk/ProductDetail/CUI-Devices/SJ-43516-SMT-TR?qs=WyjlAZoYn53r%252BAeL8NnrFw%3D%3D CUI SJ-43516-SMT-TR] - 4-contact, 3.5mm audio jack with tip and ring switches


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


==Speakers==
=== Speakers ===
* Stereo speakers in base with tuned cavity behind them as per manufacturers' recommendations.
* Stereo speakers in base with tuned cavity behind them as per manufacturers' recommendations.</onlyinclude>
 
Hardware:
* Seltech GR1813L025UN8 (or compatible)

Latest revision as of 21:16, 1 April 2021

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)
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