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2.10.1.11 - Period Measurement (16-Bit, Modes 12 & 13)

Similar to the 32-bit edge-to-edge timing modes described above (modes 2 & 3), except that hardware capture registers are used to record the edge times. This limits the times to 16-bit values, but is accurate to the resolution of the clock, and not subject to any errors due to firmware processing delays.

Note that the minimum measurable period is limited by the edge rate limit discussed in Section 2.10.2.