|fDCO, FLL||FLL lock frequency, 16 MHz, 25°C||Measured at MCLK, Internal trimmed REFO as reference||3 V||–1.0%||1.0%|
|FLL lock frequency, 16 MHz, –40°C to 85°C||3 V||–2.0%||2.0%|
|FLL lock frequency, 16 MHz, –40°C to 85°C||Measured at MCLK, XT1 crystal as reference||3 V||–0.5%||0.5%|
|fDUTY||Duty cycle||Measured at MCLK, XT1 crystal as reference||3 V||40%||50%||60%|
|Jittercc||Cycle-to-cycle jitter, 16 MHz||3 V||0.25%|
|Jitterlong||Long-term jitter, 16 MHz||3 V||0.022%|
|tFLL, lock||FLL lock time||3 V||120||ms|
Section 188.8.131.52 lists the characteristics of the REFO.