CDB4923 Datasheet, PDF (11/50 Pages) Cirrus Logic – Evaluation Board

CDB4923 CDB49300
CS8404A CS8404A CS8404A
CS8414
Data
XMT958
CDI
DAI
Parallel Compressed Data
CS492x
CS493x
x
PCM Out
Stereo PCM
CS4340
CS4340
CS4340
CS5334
Figure 2. CDB4923/300 Data Paths
PLD
Mode
2
3
4
5
DATA_SEL2
LO
LO
HI
HI
DATA_SEL1
HI
HI
LO
LO
DATA_SEL0
LO
HI
LO
HI
CS492x/CS493xx
CMPDAT
PC
S/PDIF — CS8414
S/PDIF — CS8414
A/D — CS5334
CS492x/CS493xx
SDATAN1
A/D — CS5334
S/PDIF — CS8414
A/D — CS5334
A/D — CS5334
Table 3. PROVIDED Data Selection Modes (PLD version AB-X)
MCLK
SOURCE
DSP
CS8414
CS8414
OSC/PLL
Digital Audio Source
Description
S/PDIF - CS8414
The CS8414 (U13) delivers the payload from an IEC60958 (linear PCM) or IEC61937 (nonlinear
PCM) encoded bit-stream. The incoming S/PDIF stream is connected to either J32 or J30.
A/D - CS5334
The CS5334 (U25) delivers stereo PCM which has been encoded from the analog input signals on
J55 and J56.
PC
A compressed digital audio stream is delivered in bursty format to the parallel port of the
CS492x/CS493xx from a file on the PC. This transfer mode requires that the CDB4923/300 is in a
parallel communication mode, and the PARLLPLY.EXE program is then used to deliver com-
pressed data through the PC interface.
NOTE: This data source is valid only for compressed audio and can be used only with parallel
communication modes (i.e. INTEL or Motorola mode).
Table 4. Digital Audio Sources
DS262DB2
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