Digital Audio Input Port Description
CS4953xx Hardware Users Manual
DS732UM7
Copyright 2008 Cirrus Logic, Inc
5-2
5.1.2 Supported DAI Functional Blocks
The CS4953xx DAI has many functional blocks for realizing various audio system configurations. The use of these
functions is dependent on the firmware currently available on the CS4953xx.
shows the functional block
diagram of the features currently supported with the CS4953xx DAI.
Figure 5-1. DAI Port Block Diagram
Currently supported are 4 lines of linear PCM input (DAI_DATA[3:0]) and 1 line of compressed audio or linear
PCM (DAI_DATA4). These two inputs can have their own clock domains. The firmware currently available can
operate on only one of these inputs at a time, providing for compressed data decode, stereo PCM processing, or
multichannel PCM processing. Please see AN288, “CS4953xx Firmware User’s Manual” for details about
configuring the firmware to select these different inputs to process.
5.1.3 BDI Port
Note:Currently not supported in the O/S.
The Bursty Data Input (BDI) port on the CS4953xx shares pins with the DAI port pins, and is used for input of
bursty compressed audio data. The compressed data is clocked in with a bit clock (BDI_CLK). Bursty compressed
DAI1_DATA0
PCM or Compressed Audio Input Data 0
PCM Audio Input Data 0
Serial data input that can accept PCM
audio data that is synchronous to
DAI_SCLK1/DAI_LRCLK1 or
DAO1_SCLK/DAO1_LRCLK..
135
27
Input
DAI1_DATA1
PCM Audio Input Data 1
134
26
Input
DAI1_DATA2
PCM Audio Input Data 2
132
24
Input
DAI1_DATA3
PCM Audio Input Data 3
131
23
Input
DAI2_LRCLK
Sample Rate Clock 2 PCM Audio Input
Sample Rate (LeftRight) Clock
DAI2_LRCLK is the sample rate input
clock for the serial PCM audio data on
DAI2_DATA.
140
32
Input
DAI2_SCLK
Bit Clock 2 PCM Audio Input Bit Clock
DAI2_SCLK is the bit clock input for the
serial PCM audio data on DAI2_DATA.
141
33
Input
DAI2_DATA or
DAI1_DATA4
PCM or Compressed Audio Input Data
PCM Audio Input Data
DAI2_DATA is the PCM audio data input
synchronous to DAI2_SCLK/
DAI2_LRCLK
142
34
Input
Table 5-1. Digital Audio Input Port (Continued)
Pin Name
Pin Description
LQFP-144
Pin #
LQFP-128
Pin #
Pin Type
Содержание CS4953xx
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