cs4228a Cirrus Logic, Inc., cs4228a Datasheet - Page 16

• Manufacturer Part Number: cs4228a
• Description: 24-bit, 96 Khz Surround Sound Codec
• Manufacturer: Cirrus Logic, Inc.

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.
16
DAC Inputs
SDIN1
SDIN2
SDIN3
Table 1. Serial Audio Port Input Channel Allocations
S D IN 1/2/3
L R C K
S D IN x
S C L K
S D O U T
L R C K
S C L K
right channel
right channel
right channel
I2S Mode, Data Valid on Rising Edge of SCLK
Bits/Sample
16
18 to 24
left channel
left channel
left channel
single line
Left Justified Mode, Data Valid on Rising Edge of SCLK
Bits/Sample
16
18 to 24
M SB -1 -2 -3 -4 -5
1 5 1 4 1 3 1 2 1 1 1 0
DAC #1
DAC #2
All 6 DAC channels (BRM)
DAC #3
DAC #4
DAC #5
DAC #6
L e ft C h a n n e l
+5 +4
L e ft C h a n n e l
SCLK Rate(s)
32, 48, 64, 128 Fs
32, 64 Fs
48, 64, 128 Fs
64 Fs
Figure 11. Left Justified Serial Audio Formats
SCLK Rate(s)
32, 48, 64, 128 Fs
32, 64 Fs
48, 64, 128 Fs
64 Fs
+3 +2 +1 LS B
9
8
Figure 10. I
7
6
5
4
3
2
S Serial Audio Formats
2
Notes
BRM, 48 Fs available in slave mode only
HRM
BRM, 48 Fs available in slave mode only
HRM
1
Notes
BRM, 48 Fs available in slave mode only
HRM
BRM, 48 Fs available in slave mode only
HRM
3.6.2
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.
0
M SB -1 -2 -3 -4
Serial Audio Interface Formats
1 5 14 1 3 1 2 1 1 1 0
+5 +4
R ig h t C h a n n e l
R ig h t C h a n n e l
+3 +2 +1 LS B
9
8
7
6
5
CS4228A
4
3
2
1
0