Datasheet

Program Description
3-29
Operation
3.5.4.9 Sidetone Section
The TSC2101 has an analog sidetone circuit. The audio outputs of the
TSC2101 includes a mix so that the sidetone can be mixed with the audio
output signals, in proportion to their respective volume settings.
The sidetone is enabled when the PowerUp box is checked. Its volume can
be adjusted by the analog volume control slider, ranging from −34.5 dB
to12 dB, and in 0.5-dB steps if the soft-stepping option is used. The sidetone
is muted when the Mute box under the slider is checked.
At the EVM power up, the sidetone is defaulted to power up.
3.5.4.10 Keyclick Section
When the Enable Key Click box is checked, a clicking sound is heard
whenever an audio-related setting is selected or checked in the Audio 1,
Audio 2 and the Audio Effects Filters screens.
The volume, frequency, and duration (length) of this keyclick can be adjusted
using the corresponding slider and selectors.
At the EVM power up, the keyclick is enabled by default.
3.5.4.11 Buzz Input Section
The buzzer input from the cell phone can be routed to TSC2101 through the
BUZZ_IN pin, if the checkbox by PowerDown is not selected. This input path
supports the PGA range of from −45 dB to 0 dB, and in 3 dB steps if the
soft-stepping option was chosen.
3.5.4.12 Audio Effects Filters Screen
The Audio Effects Filters screen displays all of the coefficients for the boost
filter function of the TSC2101. These coefficients are programmable. Refer to
the default Audio Effects Filters Screen shown in Figure 3−12.
Different filter coefficients can be loaded for left and right channels, although
usually these are set the same. Figure 3−16 shows an example with the
different left and right channel filters.