DS702DB2

5

CDB3308

2. PC SOFTWARE CONTROL

The CDB3308 is designed for use with the Microsoft Windows based FlexGUI graphical user interface. This inter-

face provides comprehensive control over the CS3308’s internal registers via a PC’s USB or RS-232 port.

The FlexGUI software may be downloaded and installed from www.cirrus.com/msasoftware.

Step-by-step instructions for using the FlexGUI are provided as follows:

1.

Download and install the FlexGUI software from www.cirrus.com/msasoftware.

2.

Connect the CDB3308 to a host PC using the supplied USB cable or a 9-pin serial cable.

3.

Apply positive power, negative power, and ground to the VA+, VA-, and GND binding posts respectively.

4.

Launch the FlexGUI software. The GUI will load and be displayed.

5.

Un-check the “Power Down CS3308” check box to allow audio to pass through the device.

2.1

CS3308 Controls Tab

The CS3308 Controls tab provides a high-level intuitive interface to many of the configuration options of the

CS3308. Control over the state of the CS3308’s MUTE and RESET input pins is also provided.

The Master X Mask check boxes are used to map each channel to the master controls. These check-boxes

reflect the state of their associated Master X Mask bits; when checked, the channel is un-masked.

The sliders facilitate control over the Ch X Volume registers, providing gain and attenuation in ½ dB steps.

The +¼ dB Gain check boxes are used to add an additional ¼ dB of gain to the volume level displayed for

each channel.

See the CS3308 datasheet for complete internal register descriptions.

Figure 1. CS3308 Controls Tab