PCM1754-Q1: May I ask whether the SCK signal of PCM1754 can be directly connected to BCK?

Hi Jiawei

Table 1.  shows the System Clock Rates for Common Audio Sampling Frequencies and it shows SCK has be 128fs all the way to 1152fswith few limitations depending on Fs.

On the other hand BCLK= 2x24xfs=48xfs  ( 2 is L/R channel and 24 is the channel depth). So you can not use SCK from BCK.

Regards,

Arash