Datasheet

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Program Description
Other signals, such as the SideTone, KeyClick, CP_IN, and BUZZ_IN can be routed to speaker 1 (SP1),
speaker 2 (SP2), and/or the loud speaker (LoudSP). Signal selection can be done in this section by
checking the corresponding checkbox.
The signals to SP1, SP2, or the ADC can be output to the TSC’s cellphone output pin, and the BUZZ_IN,
SP1 and SP2 signals can also be output the BUZZ_IN PGA.
The DAC PGA gain can be set to soft-stepping mode. In soft-step mode, the soft stepping can be set to
either 0.5–dB per one sample, or 0.5–dB per two samples.
The stereo DAC audio volume is controlled by the left (L) and right ®) volume control slides, selectable
through setting the master volume controller, in three different ways:
• Independent,
• Right channel controlled, or
• Left channel controlled.
In addition to the left and right DAC channel volume controls and mutes, the analog signals from the
SPK1, SPK2, OUT8P/OUT8N (loud speaker), and CP_OUT pins can be individually muted or unmuted.
The TSC2111 supports both capacitor-coupled (cap) and capacitorless (capless) headset interfaces
through settings in software and hardware. To use the capless outputs, Check the box Enable Capless
Headset Output, and select the CAPLESS setting on SW1 on the TSC2111EVM daughter board.
Note: The settings of SW1 and Enable Capless Headset Output must match for proper EVM
operation.
3.4.5 GPIO1 and GPIO2 Sections
The two GPIO pins on the TSC2111 are programmed for several different functions, selectable through
the GPIO1 or GPIO2 section. Refer to the data sheet for all of the functions. When a GPIO pin is used as
a digital output, its status can be controlled by the GPO Command to either logic high or low. When not
being used, the GPIO pin should be set to high impedance (Hi-Z).
3.4.6 Headset Section
The headset configuration section is in the Audio 2 tab, which is used mainly to set the headset input gain
through the headset PGA or the AGC, selectable by the Headset/AUX Input AGC ON checkbox.
By default, the AGC is OFF, and the programmable-gain amplifier (PGA) on the headset circuit is selected
for the gain control, allowing analog-input gain control from 0 dB to 59.5 dB. When the AGC is OFF,
moving the volume slide on the AGC OFF subsection adjusts the PGA on the MICIN_HED path. Checking
the Mute box mutes the headset input signal.
When the PGA changes from the current value to a newly programmed value, the change rate can be
controlled if the PGA Soft Stepping box is checked in the Head/Handset MIC PGA section, where the PGA
changes 0.5 dB at either 1 step per sample or one step per two samples.
When the box by AGC ON is checked, the AGC is enabled. Refer to the TSC2111 data sheet and the
appreciated application note(s) for setting and using the AGC.
In addition to the input-gain control, the headset microphone bias can be selected. The programmable
de-bounce features for the headset and button detect are also configured in this section. Refer to the data
sheet for the details on detection and de-bounce.
TSC2111EVM and TSC2111EVM-PDK20 SLAU178 – April 2006
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