CDB42518 Cirrus Logic Inc, CDB42518 Datasheet - Page 11

• Manufacturer Part Number: CDB42518
• Description: BOARD EVAL FOR CS42518 CODEC
• Manufacturer: Cirrus Logic Inc

Specifications of CDB42518

• Main Purpose: Audio, CODEC
• Embedded: Yes, FPGA / CPLD
• Utilized Ic / Part: CS42518/16
• Primary Attributes: 6 Single-Ended Analog Inputs and 8 Outputs, S/PDIF Digital Audio Transmitter and Receiver
• Secondary Attributes: GUI, I2C, SPI Interfaces
• Product: Audio Modules
• 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: 598-1502

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Step 1 - Follow Initial Board Setup procedure as described above
Step 2 - Connect to Windows Software
Connect the computer to the board and launch the CDB425xx software.
Step 3 - Connect Signal Source
Connect the analog output from the analyzer to the Left Analog Input J7. Connect the CS8406 digital output (coax
J2 or optical OPT2) to the input of the analyzer. Set the analyzer output to 1.0 VRMS, 1 kHz. Set the analyzer input
to measure digital signal level and apply a 22-22 kHz filter.
Step 4 - Configure the Board
Using the Windows software, load the preset script “Single Speed Analog In To Digital Out.LVS”. This preset will
configure the CS42518 to use OMCK as the master clock, CX and SAI ports will be masters, and the CX (ADC)
clocks data will source the CS8406 inputs. The CS8406 will output the ADC digital data to both the optical and RCA
jacks. The single speed sample rate will be 46.875kHz based upon the 24.000MHz OMCK. You may load the similar
double speed or quad speed presets to investigate higher sample rates.
Step 5 - Measure Audio
You should now have digital audio appearing at the CX_SDOUT port and the CS8406 digital output.
3.6
To measure digital to analog performance, you will need the following:
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Step 1 - Follow Initial Board Setup procedure as described above
Step 2 - Select Output Filter Jumpers
Set all CDB42518 analog output filter jumpers to the FILT2 settings.
Step 3 - Connect to Windows Software
Connect the computer to the board and launch the CDB425xx software.
Step 4 - Connect Signal Source
Connect the S/PDIF digital output from the analyzer to the optical input connector OPT1. Connect the analog OUTA1
RCA phono jack J12 to the input of the analyzer. Set the analyzer output to 0 dBFS, 1 kHz, sample rate at 48 kHz.
Set the analyzer input to measure signal level and apply a 22-22 kHz filter.
Step 5 - Configure the Board
Using the Windows software, load the preset script “Single Speed Optical In to Analog Out.LVS”. This preset will
configure the CS42518 to use the recovered PLL clock as the master clock, the SAI port will be master, the CX port
will be slaved to the SAI port, the SAI_SDOUT will source all CX_SDIN inputs. The test source left/right data will
appear at all odd/even analog outputs. You may load the similar double speed or quad speed presets to investigate
higher sample rates, but you must be sure to supply an appropriate speed SPDIF signal.
Step 6 - Measure Audio
You should now have audio appearing at the Analog A1 output.
Analog signal source and analyzer
Digital signal source and analyzer
Windows compatible computer with parallel port cable and CDB425xx software
CS42518 Demonstration Board
+18 VDC, -18 VDC, and +5 VDC power supplies
Analog signal source and analyzer
Digital signal source and analyzer
Windows compatible computer with parallel port cable and CDB425xx software
Quick Start Guide - Digital In to Analog Out
CDB42518
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