I2S as you suspect is digital audio or CD-ROM data that is
transmitted from the CD DSP to either the DAC or CD-ROM decoder.

The signals are typically MISC, SCLK, WCLK, DATA, GND corresponding
to pin 1~5.

MISC can either be a 16.9344MHz clock or C2 error correction flag.
SCLK is the bit clock, data is valid at every rising of SCLK.
WCLK is the Left/Right channel clock (Low for left, high for right)
DATA is 16-bit in a 24-bit frame per channel. The MSB comes on the
2nd rising SCLK.

Regards,
Peter Tiang

----- Original Message -----
From: Thomas Brandon <tom@PSY.UNSW.EDU.AU>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, July 19, 1999 9:25 AM
Subject: [OT] I2S vs I2C


> While looking at my Sound Blaster Live I noticed it has an I2S port. I
have
> also seen this on some sound related chips. After some preliminary
> investigations I found out it is a format used to transfer digital audio
> between DSPs and the like. Can anyone provide some info on I2S.
>
> For example,
>     Is the protocol similar to I2C?
>     What speed is it?
>     Can you use it with a PIC?
>     Can you convert it to I2C in anyway?
>
> Thanks,
> Tom.
>