There is a mistake in the PCM4220 datasheet revision B. The next-to-last sentence of page 18 reads: "When PCMEN (pin 16) is driven high, the PCM output is disabled." However, the first two sentences of page 19 read: "The PCM4220 supports 24-bit linear PCM output data when the PCMEN input (pin 16) is forced high. The PCM output is disabled when PCMEN is forced low." I am assuming that PCMEN=0 results in a disabled serial port, which is consistent with the pin's naming convention.
Thank you for pointing out that mistake. The PCMEN pin specification (active high) is indeed correct. We will fix the error in the data sheet.
Regards,
Nick