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Optical I/O for WM8804 Board
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gfvalvo  
#1 Posted : Friday, March 31, 2017 3:02:30 PM(UTC)
gfvalvo

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Hi all. I’m considering a project for which the WM8804 S/PDIF Transceiver Board seems ideal. I need Optical TOSLINK input and output with the I2S port connected to a microcontroller.

So, is there a nice solution that outfits the WM8804 board with optical I/O modules? It would be preferable if these modules mounted directly to the board rather than separately and jumpered in.

I found this module on the web site:
http://twistedpearaudio.com/digital/torx.aspx
But, I’m not sure how it would mount. Also, should it be configured for TTL or Consumer-Level when connected to the WM8804 board?

Even if that module would work, it’s only a receiver. I still need an optical transmitter.

Any recommendations would be appreciated.

Thanks.

Greg
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Brian Donegan  
#2 Posted : Tuesday, April 4, 2017 8:01:14 PM(UTC)
Brian Donegan

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The Toslink module should be set for consumer mode (just changes the output voltage swing). It will not mount directly to the board, though you could rig something up with a little creativity :)

We do not sell a transmitter. Sorry.
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hug963  
#3 Posted : Monday, August 26, 2019 4:32:10 PM(UTC)
hug963

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Hi,

I'm considering a WM8804 transceiver board too.
I already have a Toslink receiver that I would re-use.

They seem to feed the optical receiver directly to the input in the evaluation board (page 3): https://statics.cirrus.c...Schematic_and_Layout.pdf

So do you think it is necessary to change the output voltage of the optical receiver?

Thanks!
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Brian Donegan  
#4 Posted : Monday, August 26, 2019 5:10:57 PM(UTC)
Brian Donegan

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Yes, though you would want to remove R1 and jumper C10. I could do that when I build it though.
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