CS42406 Datasheet, PDF (30/50 Pages) Cirrus Logic – 24-BIT, 192kHz 2-IN 6-OUT AUDIO CODEC

CS42406
4. APPLICATIONS
4.1 Single, Double, and Quad-Speed Modes
4.1.1 ADC Serial Port
The ADC’s internal to the CS42406 can support output sample rates from 2 kHz to 200 kHz, and a base
MCLK/ADC_LRCK ratio of either 256x or 384x. The proper speed mode can be determined by the desired
output sample rate and the external MCLK/ADC_LRCK ratio, as shown in Table 1 and Table 2. Please
see section 4.2 for a discussion on how to select the desired speed mode.
Speed Mode
Single-Speed Mode
Double-Speed Mode
Quad-Speed Mode
MCLK /
ADC_SCLK /
ADC_LRCK Ratio ADC_LRCK Ratio
512x
32x, 48x, 64x
256x
32x, 48x, 64x
256x
32x, 48x, 64x
128x
32x, 48x, 64x
128x
32x, 48x, 64x
64x*
64x
Output Sample Rate Range (kHz)
43 - 50
2 - 50
86 - 100
50 - 100
172 - 200
100 - 200
* Quad-Speed Mode, 64x only available in Master Mode.
Table 1. ADC Speed Modes and the Associated Output Sample Rates (Fs) for 256x Mode
Speed Mode
Single-Speed Mode
Double-Speed Mode
Quad-Speed Mode
MCLK/ADC_LRCK ADC_SCLK/ADC_
Ratio
LRCK Ratio
768x
32x, 48x, 64x
384x
32x, 48x, 64x
384x
32x, 48x
192x
32x, 48x
192x
32x, 48x
96x*
48x
Output Sample Rate Range (kHz)
43 - 50
2 - 50
86 - 100
50 - 100
172 - 200
100 - 200
* Quad Speed Mode, 96x only available in Master Mode.
Table 2. ADC Speed Modes and the Associated Output Sample Rates (Fs) for 384x Mode
4.1.2 DAC Serial Port
4.1.2a Stand Alone Mode
The DAC’s internal to the CS42406 operate in one of four operational modes determined by the DAC_Mx
pins when in Stand Alone Mode. Sample rates outside the specified range for each mode are not support-
ed. Refer to Table 3.
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