3 one-line data mode format (multichannel), 4 dao hardware configuration – Cirrus Logic CS485xx User Manual
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Copyright 2009 Cirrus Logic, Inc.
DS734UM7
Digital Audio Output Port Description
CS485xx Hardware User’s Manual
6.2.3.3 One-line Data Mode Format (Multichannel)
The CS485xx is capable of multiplexing all digital audio outputs on one line, as illustrated in
Figure 6-6
. This
mode is available only through special request. Please contact your local Cirrus representative for further
details.
Figure 6-6. One-line Data Mode Digital Audio Formats
6.2.4 DAO Hardware Configuration
The DAO naming convention is as follows:
OUTPUT A B C D E F G
where the parameters are defined as:
A - DAO Clock Mode (Master/Slave for DAO_LRCLK and DAO_SCLK)
B - DAO1 & DAO2 Clocking Relationship
C - DAO_MCLK, DAO_SCLK, DAO_LRCLK Frequency Ratio
D - Data Format (I
2
S, Left Justified)
E - DAO_LRCLK Polarity
F - DAO_SCLK Polarity\
G - DAO TDM
Table 6-2
,
Table 6-3
,
Table 6-4
,
Table 6-5
,
Table 6-6
,
Table 6-7
, and
Table 6-8
show the different values for
each parameter as well as the hex message that needs to be sent to configure the port. When creating the
hardware configuration message, only one hex message should be sent per parameter.
Table 6-2
shows values and messages for DAO output clock mode configuration parameters.
Table 6-2. Output Clock Mode Configuration (Parameter A)
A
Value
DAO Modes (MCLK, LRCLK and
SCLK)
Hex Message
0 (Default)
DAO_MCLK - Slave
DAO_LRCLK - Slave
DAO_SCLK - Slave
0x8140001C
0x00002000
0x8140001D
0x00002000
1
DAO_MCLK - Slave
DAO_LRCLK - Master
DAO_SCLK - Master
0x8180001C
0xFFFFDFFF
0x8180001D
0xFFFFDFFF
DA O _LRC LK
DA O _SC LK
DA O _DATA
M S B
L S B
M C lo c k s
P e r C h a n n e l
M S B
L S B
M C lo c k s
P e r C h a n ne l
M C lo c k s
P e r C h a n n e l
M S B
L S B
M C lo c k s
P e r C h a n n e l
M S B
L S B
M C lo c k s
P e r C h a n n e l
M S B
L S B
M C lo c k s
P e r C h a n n e l
M S B
L S B
M S B