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AD7495CB 데이터시트(PDF) 7 Page - Analog Devices |
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AD7495CB 데이터시트(HTML) 7 Page - Analog Devices |
7 / 13 page EVAL-AD7475/AD7495CB REV. 0 –7– Figure 3 AD7898 Main Screen - Histogram Mode Setup Screen The Setup Screen is responsible for allowing the user to load the AD7475/AD7495 configuration file for the evaluation board. The configuration file will give the software detailed information about the AD7475/AD7495 evaluation board and part connected to the Evaluation Board Controller such as number of bits, maximum sampling rate, power supply requirements etc. The AD7475/AD7495 configuration file also tells the software the name of the DSP program file which it should download to the Evaluation Board Control- ler. These files are supplied by Analog Devices with the evaluation board. Figure 4 shows the Setup Screen. SETTING UP THE EVALUATION BOARD CONTROLLER The following text describes how the evaluation board Evaluation Board Controller and how AD7475/AD7495 software should be set up for the user to begin using the complete system. The Evaluation Board Controller and AD7475/AD7495 evaluation board should be connected together (via the 96 way connector). The power should be applied to the Evaluation Board Controller. At this stage the red LED should be flashing which indicates that the Evalu- ation Board Controller is functional and ready to receive instructions. The AD7475/AD7495 software which should have been installed should be loaded before the printer port cable is connected between the Evaluation Board Controller and the PC. This will ensure that the printer port has been initialized properly. The printer port cable can then be connected between the PC and the Evaluation Board Con- troller. Running the AD7475/AD7495 Software With the hardware setup the user is now in a position to use the software to control the Evaluation Board Controller and evaluation board. In the software the user should select the File menu and click on Setup. This will display the setup form. A window on the left of the setup form list all the available configuration files. The configuration files are text based files which contain information about the particular evaluation board to be tested - AD7475/AD7495.cfg. The information will cover such things as the part name, number of samples to be taken, default and maximum sampling frequency power supply settings etc. The configuration file also contains the name of the DSP program file which is to be downloaded to the Evaluation Board Controller. The user should select the AD7475.cfg configuration file and click Load. The AD7475.cfg file will work for both the AD7475 and the AD7495. The Evaluation Board Controller will be reset and the DSP program will be downloaded. When the download has been completed the power supply settings indicated in the configuration file are set and the user may hear some of the relays clicking. The pull-down menus items such as number of samples and sampling frequency will have been set to the default values specified by the configuration file. The user is free to change these at will. Once all the settings had been decided the user can click Close to return to the main form. |
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