Datasheet

EVM Operation

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Table 5. Power Selection Options - JMP1

SHUNT ON PINS VDD VOLTAGE FROM J3 PIN

1-2 +1.8VD 7

2-3 +3.3VD 9

Removed +1.2VD and +3.6VD External

4.2 Stand-Alone Operation

When used as a stand-alone EVM, power can be applied to TP6 (V

), referenced to TP12 (GND).

CAUTION

Verify that all power supplies are within the safe operating limits shown on the

TSC2008 data sheet (SBAS406) before applying power to the EVM.

4.3 USB-MODEVM Interface Power

The USB-MODEVM interface board can be powered from several different sources:

• USB

• 6VDC-10 VDC AC/DC external wall supply (not included)

• Laboratory power supply

When powered from the USB connection, JMP6 should have a shunt from pins 1-2 (this is the default

factory configuration). When powered from 6VDC-10 VDC, either through the J8 terminal block or J9

barrel jack, JMP6 should have a shunt installed on pins 2-3. If power is applied in any of these ways,

onboard regulators generate the required supply voltages, and no further power supplies are necessary.

If laboratory supplies are used to provide the individual voltages required by the USB-MODEVM interface

board, JMP6 should have no shunt installed. Voltages then are applied to J2 (+5VA), J3 (+5VD), J4

(+1.8VD), and J5 (+3.3VD). The +1.8VD and +3.3VD also can be generated on the board by the onboard

regulators from the +5VD supply; to enable this supply, the switches on SW1 need to be set to enable the

regulators by placing them in the ON position (lower position, looking at the board with text reading

right-side up). If +1.8VD and +3.3VD are supplied externally, disable the onboard regulators by placing

SW1 switches in the OFF position.

Each power supply voltage has an LED (D1-D7) which lights when the power supplies are active.

5 EVM Operation

The following section provides information on the analog input, digital control, and general operating

conditions of the TSC2008EVM.

5.1 Analog Input

The analog input sources (touch screen and auxiliary input) can be applied directly to J1 (top or bottom

side) or through signal-conditioning modules available for the modular EVM system.

5.2 Digital Control

The digital control signals can be applied directly to J2 (top or bottom side). The modular TSC2008EVM

also can be connected directly to a DSP or microcontroller interface board, such as the USB-MODEVM

interface board if purchased as part of the TSC2008EVM-PDK. See the product folder for the TSC2008 for

a current list of compatible interface and/or accessory boards.

5.3 Default Jumper Locations

Table 6 provides a list of jumpers found on the EVM and their factory default conditions.

TSC2008EVM and TSC2008EVM-PDK User's Guide SLAU248–May 2008

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