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CDB4391A Datasheet(PDF) 6 Page - Cirrus Logic

Part No. CDB4391A
Description  Evaluation Board for CS4391A
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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CDB4391A Datasheet(HTML) 6 Page - Cirrus Logic

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CDB4391A
6
DS600DB1
8. CONTROL PORT SOFTWARE
The CDB4391A is shipped with Windows based software for interfacing with the CS4391A control port
via the DB25 connector, P1. The software can be used to communicate with the CS4391A in either SPI
or I2Cmode; however, in SPI mode the CS4391A registers are write-only. Note: The CDB4391A must
be configured for control port mode as shown in Table 4.
Further documentation for the software is available on the distribution diskette. The documentation is
available in the plain text format file, README.TXT.
9. DSD OPERATION
The CDB4391A supports Direct Stream Digital (DSD) operation through the header for external clocks
and data, J9. The CS4391A must be placed into the DSD mode and the jumpers HDR1 through HDR6 must
be placed into the external clock positions.
Table 2. System Connections
CONNECTOR
INPUT/OUTPUT
SIGNAL PRESENT
+5V (J6)
Input
+ 5 Volt power
+5V (J1)
Input
+ 4.75 to + 5.25 Volt power for the CS4391A
VL
Input
+ 1.8 to +5.5 digital interface voltage (Note that VL should not
exceed the voltage applied to the +5V J1 terminal)
VEE
Input
-12 to -9V negative supply for the op-amp
VCC
Input
+9 to +12V positive supply for the op-amp
GND
Input
Ground connection from power supply
Coax Input
Input
Digital audio interface input via coax
Optical Input
Input
Digital audio interface input via optical
J9
Input/Output
I/O for master, serial, left/right clocks and serial data
Parallel Port
Input/Output
Parallel connection to PC for SPI / I2C control port signals
HDR9
Input/Output
I/O for SPI / I2C control port signals
AOUTA
Output
Channel A line level analog output
AOUTB
Output
Channel B line level analog output


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