DS700DB1

7

CDB53L21

2. SOFTWARE MODE CONTROL

The CDB53L21 may be used with the Microsoft Windows-based FlexGUI graphical user interface, allowing software

control of the CS53L21 and FPGA registers. The latest control software may be downloaded from

www.cirrus.com/msasoftware. Step-by-step instructions for setting up the FlexGUI are provided as follows:

1.

Download and install the FlexGUI software as instructed on the Website.

2.

Connect and apply power to the +5.0 V binding post.

3.

Connect the CDB to the host PC using either a 9-pin serial or USB cable.

4.

Launch the Cirrus FlexGUI. Once the GUI is launched successfully, all registers are set to their default reset

state.

5.

Enable the CS53L21 by engaging the “Enable CS53L21” push button.

6.

Refresh the GUI by clicking on the “Update” button. The default state of all registers are now visible.

7.

Engage and then disengage the “Power Down” push button in the “ADC Basic Configurations” group. This

performs the necessary write sequence to the CS53L21 for Software Mode operation.

For standard setup:

8.

Set up the signal routing in the “General Configurations” tab as desired.

9.

Set up the CS53L21 in the “ADC Configuration”, “ADC Volume Controls” or “Mix Volume Controls” tab as

desired.

10. Begin evaluating the CS53L21.

For quick setup, the CDB53L21 may, alternatively, be configured by loading a predefined sample script file:

11. On the File menu, click "Restore Board Registers..."

12. Browse to Boards\CDB53L21\Scripts\.

13. Choose any one of the provided scripts to begin evaluation.

To create personal scripts files:

14. On the File menu, click "Save Board Registers..."

15. Enter any name that sufficiently describes the created setup.

16. Choose the desired location and save the script.

17. To load this script, follow the instructions from step 11 above.