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A UART, SPI and I2C peripheral are all available on one part but share pins. The document to consult is

  • A.the reference manual's register descriptions
  • B.the errata sheet for the silicon revision
  • C.the pin multiplexing table
  • D.the electrical characteristics section of the datasheet

Answer: C

Headline peripheral counts are per-device totals and say nothing about which combinations can appear at the pins at once. The multiplexing table is where the conflict between the second SPI and the converter inputs becomes visible.

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