LPC1820 and I2S interfaces

[lpcware]

Content originally posted in LPCWare by vdelabouere on Tue Sep 23 14:24:18 MST 2014
Hi all,

I have a LPC1820 based design that is using both I2S0 and I2S1 interfaces for audio codec connections. So I have 2 stereo out and 2 stereo in.
Currently one CODEC is connected to I2S0 clock signals and the other one is connected to I2S1 clock signals.

I declared I2S0 and I2S1 as master (they provide the clocks to the codecs).

How can I make sure that I2S0 and I2S1 clocks are fully in synch ?
Do I need to declare I2S1 as a slave interface and feed some I2S0 clocks into the I2S1 ones ?
Or is there any internal LPC settings that will guarantee this synchronization ?

Thanks.

Vincent

[lpcware]

Content originally posted in LPCWare by bavarian on Fri Sep 26 04:42:21 MST 2014
Well, the concept to configure one as master, providing the clock to the other block which is configured as slave should do the job.
There is no built-in mechanism between I2S0 and I2S1 for getting a phase synchronous operation.

Regards,
NXP Support Team.