9.3.9.8 Changes in Clock Sources and Sample Rates

In slave mode, when changing clock sources, the PCM186x requires at least three BCK clocks of no clock or data for the device to reconfigure after clocks resume (if the device is in auto clock config mode).

For example, auto clock config mode: StateA = 48 kHz, change to StateB = 44.1 kHz

For changing from state A to State B:

• Leaving State A
• Hold clocks (or HiZ from external) for 3 BCK minimum
• Change clocks
• Allow ~100 µs (at least 3 BLKs at 48 kHz) for the device to reconfigure
• Data ramp back in on zero-crossing ramp (if zero crossing has not been disabled in software mode)
• Transition to State B complete

In master mode, simply switching the I/O pins on the hardware-controlled devices, or changing the sampling rate register should change the sampling rate.