INTERFACING TO THE EVALUATION BOARD Interfacing to the evaluation board is via a standard USB connector, J1. J1 is used to connect the evaluation board to the USB port of a PC. A standard USB connector cable is included with the AD7793 evaluation board to allow the evaluation board to interface with the USB port of the PC. Because the board is powered via the USB connector, there is no need for an external power supply, although if preferred, one may be connected via J3.
Communication between the AD7793 and the PC is via the USB/SPI interface. The on-board USB controller (U2) handles this communication.
To set up the USB/SPI interface, use the following procedure:
Install the AD7793 evaluation board software using the supplied AD7793 evaluation board CD before connecting the board to the PC.
After the AD7793 evaluation board software is installed, connect the board to the PC via J1 on the AD7793 evaluation board and via the USB port on the PC using the supplied USB connector cable. The PC automatically finds the new USB device and identifies it as the AD779x Evaluation Board.
Follow the on-screen instructions that appear. During the installation process if the Hardware Installation Wizard appears as shown in Figure 2, select Continue Anyway to successfully complete the installation of the AD7793 evaluation board.
Figure 2. Hardware Installation Window
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