CS4228A_03 Datasheet, PDF (16/32 Pages) Cirrus Logic – 24-Bit, 96 kHz Surround Sound Codec

CS4228A
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
allocations.
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
Figure 10, 11, 12 and 13. These formats are select-
ed using the DDF2:0 bits in the Serial Port Mode
register.
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 13 for channel
allocations.
LRCK
SCLK
S D IN x
Left Channel
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Right Channel
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
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 10. I²S Serial Audio Formats
LRCK
SCLK
S D IN 1/2/3
SDOUT
Left Channel
Right Channel
M SB -1 -2 -3 -4 -5 +5 +4 +3 +2 +1 LS B
M SB -1 -2 -3 -4 +5 +4 +3 +2 +1 LS B
Left Justified 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 11. Left Justified Serial Audio Formats
16