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AIC3254 Control Software

Before changing a control, see the data sheet to ensure that a particular control is compatible with the

current state of the codec. As an example, some controls in the Analog Setup panel must be modified in

a particular order as described in the data sheet. Other controls must only be modified with a specific

hardware setup, such as powering up the AVDD LDO.

All controls update their status with respect to the register contents in the following conditions:

• A panel is opened.

• The Execute Command Buffer button in the Command-Line Interface is pressed.

• The Refresh button at the bottom right of a panel is pressed.

4.2 Status Flags Panel

The TLV320AIC3254 status flags can monitored in the Status Flags panel (Figure 17) which is located

below the Panel Selection Tree . Pressing the POLL button continuously reads all the registers relevant

to each flag and updates those flags accordingly. The rate at which the registers are read can be modified

by changing the value in the Polling Interval numeric control. Note that a smaller interval reduces

responsiveness of other controls, especially volume sliders, due to bandwidth limitations. By default, the

polling interval is 200 ms and can be set to a minimum of 20 ms.

The Sticky Flags tab contains indicators whose corresponding register contents clear every time a read is

performed to that register. To read all the sticky flags, click the Read Sticky Flags button.

Figure 17. Status Flags Panel

4.3 Register Tables Panel

The contents of configuration and coefficient pages of the TLV320AIC3254 can be accessed through the

The Page Number control changes to the page to be displayed in the register table. The register table

contains page information such as the register name, reset value, current value, and a bitmap of the

current value. The contents of the selected page can be exported into a spreadsheet by clicking the Dump

to Spreadsheet button.

SLAU264A–October 2008–Revised September 2012 TLV320AIC3254EVM-K

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