Datasheet

Program Description
3-8
3.4.5 Audio Interface Circuitry
A mono electret microphone can be connected to J5. This jack provides both
audio and bias connections. Bias for the microphone can be supplied either
from the TSC2100’s mic bias circuitry or from an external resistor (R11). R11
is not installed on the TSC2100EVM, but can be installed by the user. Internal
or external bias is selected by JMP2.
There is also a small on-board microphone on the EVM, parallel to J5. Without
an external electrical microphone, voice can be input to the TSC2100 through
this microphone.
The TSC2100 has a built-in headphone amplifier. J6 is the jack for connection
to the amplifier and for driving a 16-Ω load at over 25 mW.
Another audio output jack (J7) is parallel to J6 and provides a secondary
connection to the TSC2100 built-in headphone amplifier (with ac coupling).
3.5 Program Description
After installing the software for the TSC2100EVM as described in Section 2.3,
you may begin using it to evaluate and develop with the TSC2100.
3.5.1 Human Interface Screen
The program’s interface is a simple, five-tab interface. Clicking on a tab takes
you to the functions associated with that tab. The program begins on the
Human Interface screen (the default) as shown in Figure 3−1.