I am using ADSP21489 Ez-board, the codec is AD1939. In the datasheet of AD1939, the sample rate of ADC can be set by the ADC Control0 Register with bit 6 and bit 7. When these two bits are set to 00, sample rate is 32kHz/44.1kHz/48kHz.
I tested the actual fs clock using analog input, however the fs clock was always 48kHz.
So how to use 32kHz or 44.1kHz as the ADC sample rate?