CDB3308 Cirrus Logic Inc, CDB3308 Datasheet - Page 4

• Manufacturer Part Number: CDB3308
• Description: BOARD EVAL FOR CS3308 VOL CTRL
• Manufacturer: Cirrus Logic Inc

Specifications of CDB3308

• Main Purpose: Audio, Volume Control
• Embedded: No
• Utilized Ic / Part: CS3308
• Primary Attributes: 8 Single-Ended Analog Inputs and Outputs, USB or RS232 Interface
• Secondary Attributes: Graphic User Interface
• Description/function: Audio DSPs
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS3308
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1496

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1.5
1.6
1.7
The 10-pin, 2 column header, J88, provides unidirectional output access to the CS3308’s SPI MOSI and
CCLK signals, as well as its AD0, ENOut, and MUTE signals. All of the signals re-driven versions of those
present directly on their respective I/O pins on the CS3308. This header may be used to connect the serial
control signals between 2 or more CDB3308’s (out of J88 on one and in to J17 on another) for multiple
CS3308 SPI serial control evaluation.
RCA connectors supply the CS3308 analog inputs through single-ended passive circuits with no input filter-
ing. Refer to the CS3308 data sheet for the maximum input signal level.
Each analog input may be AC or DC coupled to its respective RCA connector. This selection is made via
the 2-pin headers labeled “DC Couple Input” and placed adjacent to each input connector on the board. To
DC couple an input connector, place a shunt across the respective header. To AC couple an input connec-
tor, remove the shunt from the respective header. By default, the input connectors are AC coupled to the
CS3308’s inputs.
The CS3308 analog outputs are routed through single-ended passive circuits with no output filtering and
connected to RCA jacks for easy evaluation.
Each analog output may be AC or DC coupled to its respective RCA connector. This selection is made via
the 2-pin headers labeled “DC Couple Output” and placed adjacent to each output connector on the board.
To DC couple an output connector, place a shunt across the respective header. To AC couple an output
connector, remove the shunt from the respective header. By default, the output connectors are AC coupled
to the CS3308’s outputs.
USB and RS-232 connections are provided to facilitate software control of the CS3308’s internal registers.
A graphical user interface is available for the CDB3308 to allow easy manipulation of the CS3308’s internal
registers. See the CS3308 datasheet for complete internal register descriptions.
To enable the CDB3308, simply connect the supplied USB cable from an available USB port on a PC to the
USB connector (J37), or alternatively connect a 9-pin serial cable from an available COM port on a PC to
the RS-232 connector (J42) and launch the Cirrus Logic FlexGUI software.
Refer to
Analog Inputs
Analog Outputs
PC Interfaces
“PC Software Control” on page 5
for a description of the Graphical User Interface (GUI).
CDB3308
DS702DB2