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This application report presents methods of interfacing the ADS8361 16-bit SAR analog-to-digital converter to the serial peripheral interface (SPI) port of TMS470 processors. The flexible clocking scheme of the TMS470 SPI port, along with its internal 16-bit shift register, provides an easy hardware/software interface to this high-speed simultaneous sampling SAR converter for a variety of motor control applications. The software associated with this application report uses the SPI port of the TMS470R1B1M to operate the ADS8361 in the user's choice of operating modes and can be downloaded free of charge from the Texas Instruments Web site.

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