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5 EVM Operation

5.1 Analog Input

5.2 Digital Control

5.3 Default Jumper Locations

EVM Operation

Table 4. VREF Selection Options – JMP1

Shunt on Pins VREF Selection

1-2 External from J1.20

2-3 On the board from SNSVDD

Removed External from TP3

CAUTION

Verify that the external reference voltage is within the safe operating limits

shown on the TSC2004 data sheet before applying power to the EVM.

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

conditions of the TSC2004EVM.

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.

The digital control signals can be applied directly to J2 (top or bottom side). The modular TSC2004EVM

also can be connected directly to a DSP or microcontroller interface board, such as the HPA449, or to the

USB-MODEVM Interface Board if purchased as part of the TSC2004EVM-PDK. For a current list of

compatible interface and/or accessory boards for the EVM or the TSC2004, see the relevant product

folder on the TI Web site.

Table 5 provides a list of jumpers found on the EVM and their factory default conditions.

Table 5. List of Jumpers

Jumper Description Default Shunt Position

JMP1 Reference Voltage Selection – 2-3 (onboard or SNSVDD)

1-2: external VREF

2-3: on-board SNSVDD

JMP2 Analog Power or SNSVDD Select – 2-3 (+3.3VD)

1-2: +1.8VD

2-3: +3.3VD

JMP3 EEPROM Address Select – Installed (FW from EEPROM

on TSC2004EVM board)

Installed: firmware for the motherboard from the EEPROM onboard the

TSC2004EVM

Removed: firmware for the motherboard from the EEPROM on motherboard

JMP4 IOVDD Power Select – 3-4 (= SNSVDD)

2-4: IOVDD from J3.7 (+1.8VD)

3-4: IOVDD from SNSVDD

4-6: IOVDD from J3.9 (+3.3VD)

JMP5 TSC2004 I

C Address Bit A0. Uninstalled A0 = 1. Installed (A0 = 0)

JMP6 TSC2004 I

C Address Bit A1. Uninstalled A1 = 1. Installed (A1 = 0)

SLAU215 – May 2007 TSC2004EVM and TSC2004EVM-PDK 5

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