Careful attention must be paid to the relationship between MCLK, FSYNC, and BCLK when using stand-alone slave configurations. When operating the device in the default mode (sampling-rate mode-1 configuration), the configurations shown in Table 6 must be met.
All of these signals (BCLK, MCLK, and FSYNC) must be synchronous
Вынь да полож синхронные сигналы и в slave-режиме.