WM8753
From Openmoko
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(connection summary posted by joerg) |
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* "Mono Mixer Left" and "Mono Mixer Right Playback Switch" connect the stereo DAC for mono mixing. | * "Mono Mixer Left" and "Mono Mixer Right Playback Switch" connect the stereo DAC for mono mixing. | ||
* XXX bypass, sidetone, voice | * XXX bypass, sidetone, voice | ||
| + | |||
| + | From: Joerg Reisenweber <joerg@openmoko.org> | ||
| + | To: openmoko-devel@lists.openmoko.org | ||
| + | Date: Thu, 12 Jun 2008 15:48:58 +0200 | ||
| + | |||
| + | LOUT2/ROUT2 is handset earpiece (aka receiver). | ||
| + | LOUT1/ROUT1 is routing to external amp, which there is switching between | ||
| + | headset-stereo and device-speaker-mono(GTA02)/stereo(GTA01) via | ||
| + | cpu-GPIO[HP_IN]. (what also is a function I expect to see in alsa-driver of | ||
| + | our "OEM-card", but surely NOT in WM8753-alsa-driver) | ||
| + | |||
| + | NC: OUT3 OUT4 | ||
| + | |||
| + | MONO1, MONO2: differential output routing to mic analog in of GSM | ||
| + | |||
| + | and while I'm writing... | ||
| + | MIC2,MIC2N: diff. input from handset mic | ||
| + | MIC1,MIC1N: "differential" Input from headset (ring3 jack, MIC1N:GND via 100N) | ||
| + | RXP,RXN: diff. input from GSM analog "earpiece" output | ||
| + | ACOP->AIN via 100N | ||
| + | LINE1, LINE2: to testpoint H-TP3001/2, NC | ||
| + | VXD: digital PCM to BT (mono only?) | ||
| + | DACDAT, ADCDAT: to cpu via IIS | ||
=== Neo modes === | === Neo modes === | ||
Revision as of 20:42, 12 June 2008
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
http://wolfson.co.uk/uploads/images/en/WM8753_BlockDiagram.gif
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
From: Joerg Reisenweber <joerg@openmoko.org> To: openmoko-devel@lists.openmoko.org Date: Thu, 12 Jun 2008 15:48:58 +0200 LOUT2/ROUT2 is handset earpiece (aka receiver). LOUT1/ROUT1 is routing to external amp, which there is switching between headset-stereo and device-speaker-mono(GTA02)/stereo(GTA01) via cpu-GPIO[HP_IN]. (what also is a function I expect to see in alsa-driver of our "OEM-card", but surely NOT in WM8753-alsa-driver) NC: OUT3 OUT4 MONO1, MONO2: differential output routing to mic analog in of GSM and while I'm writing... MIC2,MIC2N: diff. input from handset mic MIC1,MIC1N: "differential" Input from headset (ring3 jack, MIC1N:GND via 100N) RXP,RXN: diff. input from GSM analog "earpiece" output ACOP->AIN via 100N LINE1, LINE2: to testpoint H-TP3001/2, NC VXD: digital PCM to BT (mono only?) DACDAT, ADCDAT: to cpu via IIS
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
- The WM8753 data sheet (PDF)
- asoc-* at OpenMoko kernel patches
