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6.3 USB-MODEVM Interface Board
Kit Operation
Figure 3. Interface GUI
In order to use the touch screen features, a 4-wire resistive touch screen needs to be connected to J1 of
the TSC2004EVM, as described previously. That is: the 4 wires of the touch panel should be connected to
the pins 2 (X+), 4(X–), 6(Y+), and 8(Y–) of J1A on the TSC2004EVM board.
The simple diagram shown in Figure 1 shows only the basic features of the USB-MODEVM Interface
Board. The board is designed for a TAS1020B USB controller with an 8052-based core. It features two
positions for modular EVMs, or one double-wide serial modular EVM can be installed.
For use with the TSC2004, the TSC2004EVM is installed in the topmost EVM slot, which connects the
TSC2004 digital control interface to the I
2
C port of the TAS1020B. Because the TSC2004 has no audio
features, the lower EVM slot (which is connected to the TAS1020B digital audio interface) is not used.
As configured from the factory, the board is ready to use with the TSC2004EVM. However, if external I
2
C
control is desired, the signals may be applied to J6. To view all the functions and configuration options
available on this board, see the USB-MODEVM Interface Board schematic in Section 7.2.
TSC2004EVM and TSC2004EVM-PDK8 SLAU215 – May 2007
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