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16-MHz RC OSCILLATOR Measured on Texas Instruments CC2540 EM reference design with TA = 25°C and VDD = 3 V PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Frequency(1) 16 MHz Uncalibrated frequency accuracy ±18% Calibrated frequency accuracy ±0.6% Start-up time 10 μs Initial calibration time(2) 50 μs (1) The calibrated 16-MHz RC oscillator frequency is the 32-MHz XTAL frequency divided by 2. (2) When the 16-MHz RC oscillator is enabled, it is calibrated when a switch from the 16-MHz RC oscillator to the 32-MHz crystal oscillator is performed while SLEEPCMD.OSC_PD is set to 0.
