CS4228A Datasheet, PDF (15/32 Pages) Cirrus Logic – 24-Bit, 96 kHz Surround Sound Codec

CS4228A
SDIN1, SDIN2, and SDIN3 are the data input pins.
SDOUT, the data output pin, carries data from the
two 24-bit ADC’s. The serial audio port may also
be operated in One Line Data Mode in which all 6
channels of DAC data is input on SDIN1 and the
stereo ADC data is output on SDOUT. Table 1 out-
lines the serial port input to DAC channel alloca-
tions.
DAC Inputs
SDIN1
left channel
right channel
single line
SDIN2
left channel
right channel
SDIN3
left channel
right channel
DAC #1
DAC #2
All 6 DAC channels (BRM)
DAC #3
DAC #4
DAC #5
DAC #6
Table 1. Serial Audio Port Input Channel Allocations
3.6.2 Serial Audio Interface Formats
The digital audio port supports 6 formats, shown in
Figures 9, 10, 11 and 12. These formats are selected
using the DDF2:0 bits in the Serial Port Mode reg-
ister.
In One Line Data Mode, all 6 DAC channels are in-
put on SDIN1. One Line Data Mode is only avail-
able in BRM. See Figure 12 for channel
allocations.
LRCK
SCLK
SDIN1/2/3
SDOUT
Left Channel
MSB -1 -2 -3 -4 -5 +5 +4 +3 +2 +1 LSB
Right Channel
MSB -1 -2 -3 -4 +5 +4 +3 +2 +1 LSB
I2S Mode, Data Valid on Rising Edge of SCLK
Bits/Sample
SCLK Rate(s)
Notes
16
32, 48, 64, 128 Fs BRM, 48 Fs available in slave mode only
32, 64 Fs
HRM
18 to 24
48, 64, 128 Fs
64 Fs
BRM, 48 Fs available in slave mode only
HRM
Figure 9. I²S Serial Audio Formats
DS511PP1
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