58.4.6 3 to 20 MHz Crystal Oscillator Characteristics

Table 58-22. 3 to 20 MHz Crystal Oscillator Characteristics
Symbol	Parameter	Conditions	Min.	Typ.	Max.	Unit
f_OSC	Operating Frequency	Normal mode with crystal	3	–	20	MHz
t_START	Startup Time	3 MHz, C_SHUNT = 3 pF	–	–	40	ms
		12 MHz, C_SHUNT = 7 pF with C_M = 1.6 fF	–	–	6	ms
		20 MHz, C_SHUNT = 7 pF with C_M = 1.6 fF	–	–	5.7	ms
I_DDON	Current Consumption (on VDDIO)	3 MHz	–	230	–	µA
		12 MHz	–	390	–	µA
		20 MHz	–	450	–	µA
C_L	Internal Equivalent Load Capacitance	Integrated Load Capacitance	7.5	9	10.5	pF
C_L	Internal Equivalent Load Capacitance	(X_IN and X_OUT in series)	7.5	9	10.5	pF

C_LEXT = 2 × (C_CRYSTAL – C_L – C_PCB)

where, C_PCB is the capacitance of the printed circuit board (PCB) track layout from the crystal to the pin.