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EVAL-AD73360LEB Datasheet(PDF) 5 Page - Analog Devices |
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EVAL-AD73360LEB Datasheet(HTML) 5 Page - Analog Devices |
5 / 9 page EVAL-AD7360(L)EB REV. 0 – 5 – When the DSP program is running the user can click Take Samples. This will cause the the PC to send a com- mand to the DSP on the evaluation board. The DSP will bring the SE and RESET lines of the AD73360(L) high and begin programming the device. The AD73360(L) is configured in Frame-Sync Loop Back and is programmed to operate in Data Mode. After allowing some time for the reference to settle the AD73360(L) will store the required number of samples to the data memory of the DSP. Once completed the DSP will bring the RESET and SE of the AD73360(L) low and begin uploading the data to the PC. When the data has been transferred the PC will graph the data and calculate the FFT. It should be noted that the number of channels selected at the top of the demonstra- tion window should match the number of ADC channels powered up on the AD73360(L). THE BASIC MODE SCREEN The Basic Mode Screen as shown in Figure 2 allows the user to download their own programs to the evaluation board, send it commands and upload data memory for saving or analysis. Downloading Programs The user has the option of downloading a program to the evaluation board in one of two ways. The first is to down- load the program but not to run it until the Run button is clicked. The second is to download and automatically run the program. If the user is using a modified version of the BASIC.DSP program the LED on FL2 will flash a num- ber of times to indicated that the program has been down- loaded and run successfully. Sending Commands A command can be sent to the evaluation board which can be used to determine which action is to be performed. The command is made up of an Identifier Byte and a 16 bit Control Word. The Identifier Byte is stored in data memory location 0x3FDB and the Control Word is stored in data memory location 0x3FDA. The BASIC.DSP pro- gram will read the Identifier Byte and flash the LED that number of times. Uploading Data If the user has acquired ADC data from the AD73360(L) which is stored in data memory it can be uploaded to the PC. Clicking the Upload Data button will display the screen shown in Figure 6. The user can select the start address and the number of words to upload. The uploaded data can be saved to a file or to a list box on the Basic Mode Screen. The user also has the option to save/display the data in decimal or hexidecimal format. Reset Board This button allows the user to reset the evaluation board if required. Get Software Version This button will read the version number of the boot pro- gram which is store on the evaluation board. This is a useful indication that the communication routines are fully working as it involves 2-way communication to be suc- cessful. Figure 6. the Upload Data Screen |
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