hamsternz
commented
8 years ago Hi!
You can send me an email if you like, but here is a brief description.
I2S is a way to send multi-channel audio streams (usually stereo) between devices, usually on the same PCB. It can use either three or four signals.
- MCLK - this is the common master clock. It is usually 256 or 384 times the sample rate of the stream (for either 16-bit or 24-bit samples)
- BCLK - this is the bit clock, and usually runs a 32x the sample rate, for 16-bit audio data, or 48x for 24-bit samples.
- LRCLK - This signal is asserted while the first channel's samples are being transferred (ie. at the sample rate),
-SDAT - The serial data stream, as signed samples in MSB-first order.
All the three clock signals must be derived from the same master clock. The only slightly tricky bit, is that SDAT is usually delayed one bit-time with respect to LRCLK.
The datasheet for the part used is at http://www.analog.com/media/en/technical-documentation/data-sheets/SSM2518.pdf
The Analog Device datasheets are very detailed - you will find all the information you need in there. It would take just as many pages to explain to the same level of detail that is in datasheet,
please explain me I2S bitstream used in pmodamp3 design...please help!!