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An engineer selects a part on unit price alone and later finds the peripheral pins conflict. The step that was omitted was

  • A.measuring the sleep current of the candidate parts
  • B.confirming the vendor's longevity commitment
  • C.benchmarking the core against the application's hot loop
  • D.checking the pin multiplexing table against the required functions

Answer: D

A datasheet's feature list counts functions across the whole device, and the multiplexing table is where it emerges that the second SPI shares pins with the converter inputs. Checking it takes an hour and saves a board respin.

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