ƒmaster = 2 Mhz tonePeriod ∈ [ 0 ; 4095 ]
ƒtone = ƒmaster / ( 16 * TonePeriod ) tonePeriod = ƒmaster / ( 16 * ƒtone )
ƒtone = 125,000 / TonePeriod tonePeriod = 125,000 / ƒtone