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6.3 USB-MODEVM Interface Board
Kit Operation
Figure 2. Default Software Screen
In order to use the touch screen features, a 4-wire resistive touch screen will need to be connected to J1
of the TSC2003EVM, as described earlier.
The simple diagram shown in Figure 1 shows only the basic features of the USB-MODEVM Interface
board. The board is built around a TAS1020B streaming audio USB controller with an 8051-based core.
The board features two positions for modular EVMs, or one double-wide serial modular EVM may be
installed.
For use with the TSC2003, the TSC2003EVM is installed in the topmost EVM slot, which connects the
TSC2003 digital control interface to the I
2
C port realized using the TAS1020B. Since the TSC2003 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 TSC2003EVM. However, if external SPI
control is desired, the signals may be applied to J15, as long as the SW2 is set so that USB SPI control is
disabled. To view all the functions and configuration options available on this board, see the
USB-MODEVM Interface Board schematic in Section 9 .
TSC2003EVM and TSC2003EVM-PDK User's Guide8 SBAU109 – March 2005