42.6.1.1 Clock Configuration

The interpolator accepts input sampling frequencies (fs) and the input DSP clock (DSPCLK) that can be configured in the CLASSD Interpolator Mode Register. GCLK must be configured in the PMC according to the desired DSPCLK so that DSPCLK = GCLK / 8.

The following table provides authorized DSPCLK / fs ratios and associated filter types.

Table 42-2. Authorized DSPCLK / fs Ratios & Filter Types
fs DSPCLK
12.288 MHz 11.2896 MHz
8 kHz 2
16 kHz 2
32 kHz 2
48 kHz 1
96 kHz 3
22.05 kHz 1
44.1 kHz 1
88.2 kHz 3
Note: Each dash (–) indicates a configuration that is not authorized and that raises the CFGERR flag in CLASSD_INTSR.