22.3.2 Timer1 Mode Resource

In Compare mode, Timer1 must be running in either Timer mode or Synchronized Counter mode. The compare operation may not work in Asynchronous Counter mode.

See Section "Timer1 Module with Gate Control" for more information on configuring Timer1.

Important: Clocking Timer1 from the system clock (F_OSC) should not be used in Compare mode. In order for Compare mode to generate the trigger event on the CCPx pin, Timer1 must be clocked from the instruction clock (F_OSC/4) or from an external clock source.

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