WM8753

From Openmoko

(Difference between revisions)
Jump to: navigation, search
(add neo modes)
(voice interface bluetooth info)
Line 1: Line 1:
 
'''WM8753''' (also the '''Wolfson Codec''') is the "sound card" chip in the [[Neo1973 audio subsystem]]. It has a stereo ADC for recording and a stereo DAC for playback, plus a mono "voice" DAC.
 
'''WM8753''' (also the '''Wolfson Codec''') is the "sound card" chip in the [[Neo1973 audio subsystem]]. It has a stereo ADC for recording and a stereo DAC for playback, plus a mono "voice" DAC.
  
−
It's connected to the [[S3C2410]] IIS interface for PCM data, and to the S3C2410 [[I2C]] interface for control. (Is the "voice" interface unconnected?). The stereo output ("Audio Out": LOUT1 and ROUT1) is connected to [[LM4857]] stereo input (LIN and RIN) for amplification. MONO1 and MONO2 form "GSM Line Out"; RXP and RXN form "GSM Line In". MIC1 is "Headset Mic", and MIC2 is "Call Mic".
+
It's connected to the [[S3C2410]] IIS interface for PCM "hi-fi" data, and to the S3C2410 [[I2C]] interface for control. The PCM "voice" input and output is connected to the [[Bluetooth]] chip. The stereo output ("Audio Out": LOUT1 and ROUT1) is connected to [[LM4857]] stereo input (LIN and RIN) for amplification. MONO1 and MONO2 form "GSM Line Out"; RXP and RXN form "GSM Line In". MIC1 is "Headset Mic", and MIC2 is "Call Mic".
  
 
The following output pins are not connected: LOUT2 and ROUT2, OUT3, OUT4. The following input pins are not connected: LINE1, LINE2.
 
The following output pins are not connected: LOUT2 and ROUT2, OUT3, OUT4. The following input pins are not connected: LINE1, LINE2.

Revision as of 03:13, 27 November 2007

WM8753 (also the Wolfson Codec) is the "sound card" chip in the Neo1973 audio subsystem. It has a stereo ADC for recording and a stereo DAC for playback, plus a mono "voice" DAC.

It's connected to the S3C2410 IIS interface for PCM "hi-fi" data, and to the S3C2410 I2C interface for control. The PCM "voice" input and output is connected to the Bluetooth chip. The stereo output ("Audio Out": LOUT1 and ROUT1) is connected to LM4857 stereo input (LIN and RIN) for amplification. MONO1 and MONO2 form "GSM Line Out"; RXP and RXN form "GSM Line In". MIC1 is "Headset Mic", and MIC2 is "Call Mic".

The following output pins are not connected: LOUT2 and ROUT2, OUT3, OUT4. The following input pins are not connected: LINE1, LINE2.

Contents

Routing

There are several sources connected via switches that can cut each source out:

  • "Left Mixer Left" and "Right Mixer Right Playback Switch" connect the stereo DAC for stereo mixing.
  • "Mono Mixer Left" and "Mono Mixer Right Playback Switch" connect the stereo DAC for mono mixing.
  • XXX bypass, sidetone, voice

Neo modes

  • Off: all off.
  • GSM Handset: only "Headset Mic" off.
  • GSM Headset: only "Call Mic" off.
  • GSM Bluetooth: only "Line In" and "Line Out" on.
  • Speakers: only "Audio Out" on.
  • Headphones: only "Audio Out" on.
  • Capture Handset: only "Call Mic" on.
  • Capture Headset: only "Headset Mic" on.
  • Capture Bluetooth: all off.

See also

External links

Retrieved from "http://openmoko.org/index.php?title=WM8753&oldid=21669"
Personal tools

WM8753 (also the Wolfson Codec) is the "sound card" chip in the Neo1973 audio subsystem. It has a stereo ADC for recording and a stereo DAC for playback, plus a mono "voice" DAC.

It's connected to the S3C2410 IIS interface for PCM "hi-fi" data, and to the S3C2410 I2C interface for control. The PCM "voice" input and output is connected to the Bluetooth chip. The stereo output ("Audio Out": LOUT1 and ROUT1) is connected to LM4857 stereo input (LIN and RIN) for amplification. MONO1 and MONO2 form "GSM Line Out"; RXP and RXN form "GSM Line In". MIC1 is "Headset Mic", and MIC2 is "Call Mic".

The following output pins are not connected: LOUT2 and ROUT2, OUT3, OUT4. The following input pins are not connected: LINE1, LINE2.

Routing

There are several sources connected via switches that can cut each source out:

  • "Left Mixer Left" and "Right Mixer Right Playback Switch" connect the stereo DAC for stereo mixing.
  • "Mono Mixer Left" and "Mono Mixer Right Playback Switch" connect the stereo DAC for mono mixing.
  • XXX bypass, sidetone, voice

Neo modes

  • Off: all off.
  • GSM Handset: only "Headset Mic" off.
  • GSM Headset: only "Call Mic" off.
  • GSM Bluetooth: only "Line In" and "Line Out" on.
  • Speakers: only "Audio Out" on.
  • Headphones: only "Audio Out" on.
  • Capture Handset: only "Call Mic" on.
  • Capture Headset: only "Headset Mic" on.
  • Capture Bluetooth: all off.

See also

External links