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6.3 USB-MODEVM Interface Board
Kit Operation
The software should automatically find the ADS7845EVM, and a screen similar to the one in Figure 2
should appear.
Figure 2. Default Software Screen
In order to use the touch screen features, a 5-wire, resistive touch screen must be connected to J1 of the
ADS7845EVM, as described previously.
The simple diagram shown in Section 6.1 shows only the basic features of the USB-MODEVM Interface
Board. The board is designed for a TAS1020B streaming audio USB controller with an 8051-based core. It
features two positions for modular EVMs, or one double-wide serial modular EVM may be installed.
For use with the ADS7845, the ADS7845EVM is installed in the topmost EVM slot, which connects the
ADS7845 digital control interface to the SPI port, realized using the TAS1020B. Because the ADS7845
has no audio features, the lower EVM slot (which is connected to the TAS1020B digital audio interface) is
not used.
8 ADS7845EVM and ADS7845EVM-PDK SBAU122 – March 2006
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