CS8406 Cirrus Logic, CS8406 Datasheet - Page 14
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CS8406
Manufacturer Part Number
CS8406
Description
192 KHZ DIGITAL AUDIO INTERFACE TRANSMITTER
Manufacturer
Cirrus Logic
Datasheet
1.CS8406.pdf
(43 pages)
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14
4. THREE-WIRE SERIAL INPUT AUDIO PORT
A 3-wire serial audio input port is provided. The interface format can be adjusted to suit the at-
tached device through the control registers. The following parameters are adjustable:
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Figure 7 shows a selection of common input formats with the corresponding control bit settings.
In master mode, the left/right clock and the serial bit clock are outputs, derived from the OMCK
input pin master clock.
In slave mode, the left/right clock and the serial bit clock are inputs. The left/right clock must be
synchronous to the OMCK master clock, but the serial bit clock can be asynchronous and dis-
continuous if required. The left/right clock should be continuous, but the duty cycle can be less
than the specified typical value of 50% if enough serial clocks are present in each phase to clock
all the data bits.
Master or slave
Serial clock frequency
Audio data resolution
Left or right justification of the data relative to left/right clock
Optional one-bit cell delay of the first data bit
Polarity of the bit clock
Polarity of the left/right clock. (By setting the appropriate control bits, many formats are pos-
sible).
CS8406
DS580F1