I am working with the I2S audio protocol in one of my projects and I'd like to use it in one of my final projects for a class of mine. Quite honestly though, I don't entirely understand the MCLK line. You'd think, "Oh that just stands for Master Clock" and you might be right but since everything has to do with audio and sampling rates, I get confused.
I'm using the CS42436 in software mode: in short it takes in 3 signals (that I'm questioning).
MCLK – Master Clock (Input) – Clock source for the delta-sigma modulators and digital filters.
SCLK – Serial Clock (Input) – Serial clock for the serial audio interface. Input frequency must be 256 x Fs
FS – Frame Sync (Input) – Signals the start of a new TDM frame in the TDM digital interface format.
Can somebody explain how to use these clock signals in reference to this picture?
I know the middle signal is the serial clock, but the other two I don't understand at all.