// 55FC * 8us == 440us / 21.3 === 20.65 steps. could be too short. Go for 56FC instead
// 32FC * 8us == 256us / 21.3 == 12.018 steps. ok
// 16FC * 8us == 128us / 21.3 == 6.009 steps. ok
// 55FC * 8us == 440us / 21.3 === 20.65 steps. could be too short. Go for 56FC instead
// 32FC * 8us == 256us / 21.3 == 12.018 steps. ok
// 16FC * 8us == 128us / 21.3 == 6.009 steps. ok