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permanent I2S MCK output

Question asked by lutz.tilo on May 28, 2012
Latest reply on Nov 13, 2013 by yu.hualing
Hi

I want to connect a PCM3168a audio codec to a STM32F407VG (Discovery board).
The problem is the Codec is only alive when MCK is provided. Without MCK the control interface (i2c) is dead.
Is use SPI3 in I2S mode for communication. Regarding documentation MCK is only active when a transfer is in progress. Does that mean the PLLI2S clock is only active when a transfer is in progress?

My idea is to use MCO2 to provide the clock output of PLLI2S instead of using the MCK feature of the I2S to provide the clock for the coded.

Will this work?

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