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Kit Operation
Figure 23. Output Stage Configuration Tab
The Common Mode Voltage of the outputs may be set to 1.35V, 1.5V, 1.65V, or 1.8V using the Common
Mode Voltage control. The Power-On Delay of the output drivers can be set using the corresponding
control from 0µs up to 4 seconds. Ramp-Up Step Timing can also be adjusted from 0ms to 4ms.
The high power outputs of the TLV320AIC33 can be configured to go to a weak common-mode voltage
when powered down. The source of this weak common-mode voltage can be set on this tab with the
Weak Output CM Voltage Source drop-down. Choices for the source are either a resistor divider off the
AVDD_DAC supply, or a bandgap reference. See the datasheet for more details on this option.
The outputs can be set to soft-step their volume changes, using the Output Volume Soft Stepping
control, and set to step once per Fs period, once per two Fs periods, or soft-stepping can be disabled
altogether.
Headset detection features are enabled using the Enable button in the Headset Detection groupbox.
When enabled, the indicators in the HS/Button Detect groupbox will light when either a button press or
headset is detected. When a headset is detected, the type of headset is displayed in the Detection Type
indicator. Debounce times for detection are set using the Jack Detect Debounce and Button Press
Debounce controls, which offer debounce times in varying numbers of milliseconds. See the
datasheet for a discussion of headset detection.
TLV320AIC33EVM and TLV320AIC33EVM-PDK User's Guide
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SBAU114 – November 2005