CDB42438 Cirrus Logic Inc, CDB42438 Datasheet - Page 6

• Manufacturer Part Number: CDB42438
• Description: Eval Bd 108dB 6&8ch Multi-Chnl CODECs
• Manufacturer: Cirrus Logic Inc

Specifications of CDB42438

• Main Purpose: Audio, CODEC
• Embedded: Yes, FPGA / CPLD
• Utilized Ic / Part: CS42438
• Primary Attributes: 6 Single-Ended and 2 Differential Analog Inputs and 8 Outputs, S/PDIF Transmitter and Receiver
• Secondary Attributes: Graphic User Interface
• Description/function: Audio CODECs
• Operating Supply Voltage: 5 V to 12 V
• Product: Audio Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: CS42438
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 598-1500

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1.10 Analog Input
1.11 Analog Outputs
1.12 Serial Control Port
1.13 USB Control Port
Selections are made in the control port of the FPGA, accessible through the “FPGA” tab of
the Cirrus Logic FlexGUI software. Refer to register “DSP Header Control (address 07h)” on
page 20 for configuration settings
The 12-pin, 3 row header, J11, allows the user bidirectional access to the SPI/I
nals by simply removing all the shunt jumpers from the “PC” position. The user may then
choose to connect a ribbon cable to the “EXTERNAL” position. A single “GND” row for the
ribbon cable’s ground connection is provided to maintain signal integrity. Two unpopulated
pull-up resistors are also available should the user choose to use the CDB for the I
rail.
RCA connectors supply the CS42438 analog inputs through unity gain, AC-coupled single-
ended to differential circuits. The inputs may also be driven single-ended by shunting the ap-
propriate stake headers labeled “Single In”. A 1 Vrms single-ended signal into the RCA con-
nectors will drive the CS42438 inputs to full scale.
The CS42438 analog outputs may be routed either through a single-pole RC passive filter,
or a differential to single-ended 2-pole active filter.
A graphical user interface is included with the CDB42438 to allow easy manipulation of the
registers in the CS42438 (see the CS42438 data sheet for register descriptions) and FPGA
(see section 5 on page 16 for register descriptions). Connecting a cable to the RS-232 con-
nector (J7) and launching the Cirrus Logic FlexGUI software will enable the CDB42438.
Refer to “Software Mode” on page 7 for a description of the Graphical User Interface (GUI).
The USB control port connector (J12) is currently unavailable.
CDB42438
2
C control sig-
DS646DB2
2
C power