Datasheet

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I/O Connector and Signals

3-5

Operation

3.2.6 IOVDD Voltage Selection

One of the features of the TSC2101 device is that the digital IO power supply

for the TSC2101 device is flexible, ranging from 1.1 V to 3.6 V. To evaluate the

feature, the EVM has the JMP7 for the selection of the IOVDD, either 3.3 V

(JMP7 to 1 and 2 position), or 1.8 V (JMP7 to 2 and 3 position).

3.2.7 AUX Input Selection

The auxiliary analog input pins, AUX1 and AUX2, can be used to measure the

voltages applied on the pins or the resistance on the pins, selectable in the

TSC2101 control register page 1 and address 0x0C. Also, under the

resistance measurement mode, there are two operation modes, either internal

bias or external bias resistance measurement. When AUX1 is used for the

external bias resistance measurement, install the JMP9; when AUX2 is used

for the external resistance measurement, install the JMP8. Otherwise, leave

the jumper(s) uninstalled. Refer to the TSC2101 data sheet for more details.

Additionally, the AUX1 or AUX2 can be paired with the MICIN−HED or

MICIN−HND to be used as the TSC2101 audio codec’s differential

microphone input port. Refer to section 3.2.3 and the TSC2101 data sheet for

more details.

3.3 I/O Connector and Signals

The various connectors on the TSC2101EVM are described in this section.

3.3.1 Audio Connectors

The TSC2101 audio inputs and outputs are routed through the 3,5-mm jacks

or terminal blocks. Note the polarity of channel assignments for these

connectors.

Table 3−4.Audio Connectors

Reference

Designator

Name Description

Tip = mic input

J6 Mic In

Microphone input to handset

microphone in (MICIN_HND)

ring = mic bias voltage (or MICIN if

differential)

sleeve = ground

tip1 = headset microphone input

tip2= headset right output channel

J7 HEADSET Headset input/output connection

ring = headset left output channel

sleeve = audio common ground

Receiver driver (32-Ω output)

J8+ = OUT32P(SPK1)

J8 OUT32

Receiver driver (32-

Ω

output)

connection

J8− = OUT32M

Loud speaker (8-Ω output)

J9+ = OUT8P

J9 OUT8

Loud speaker (8-

Ω

output)

connection

J9− = OUT8M