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Trimming Oscillator Frequencies | Cypress Semiconductor

Trimming Oscillator Frequencies

Last Updated:

November 22, 2013

The IMO trim register increment is approximately 80kHz per step. You can directly write to the trim register (IMO_TR), but you cannot read from it since it's a write only register. To get the initial value, you would need to perform a supervisor call. The frequency reference is an oscillator in the ICE.