Question Is it possible to connect an external microcontroller to the EVAL-AD7734? If so, how can I disable the internal ADuC824BS controller? Answer Two possible ways to implement external microcontroller communications are: 1. If you want to drive the on-board AD7734 from an external controller using the MM74HC573, put on links LK28 and LK29. That would keep the ADuC824 in download mode (to release the SPI bus) and enable the MM74HC573 buffers. 2. If you want to drive the on-board AD7734 from an external controller, bypassing the MM74HC573, use position J3 to access the interface signals (you can solder a standard 10-pin header there) and put on link LK28 to keep the ADuC824 in download mode. Leave the LK29 open to keep the MM74HC573 disabled.

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The AD7732 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with total conversion times of 500...
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