46.10.2 Internal Oscillators

Table 46-10. Internal Oscillator Specifications⁽¹⁾
Internal Oscillators
Operating Conditions: V_DD = V_DDMINto V_DDMAX Temperature = -40°C to +125°C
Symbol	Description	Min.	Typ. ✝	Max.	Unit	Conditions
f_OSCHF	OSCHF frequency⁽²⁾	-	1	-	MHz	FRQSEL = 1M
		-	2	-		FRQSEL = 2M
		-	3	-		FRQSEL = 3M
	Precision calibrated OSCHF frequency	-	4	-	MHz	FRQSEL = 4M
		-	8	-		FRQSEL = 8M
		-	12	-		FRQSEL = 12M
		-	16	-		FRQSEL = 16M
		-	20	-		FRQSEL = 20M
	Precision calibrated OSCHF accuracy at calibration point	-1.8%	-	+1.8%		FRQSEL = 4M to 20M, T_A = +25°C, V_DD = 3.0V
%_CAL	OSCHF tune step size	-	0.4	-	%
t_{OSCHF_ST}⁽³⁾	OSCHF wake-up from sleep startup time	-	24	-	µs	Device in Idle or Standby sleep mode, VREGCTRL.PMODE = FULL
t_{OSCHF_ST}⁽³⁾	OSCHF wake-up from sleep startup time	-	220	-	µs	Device in Power-Down sleep mode, VREGCTRL.PMODE = AUTO
f _OSC32K	Internal OSC32K frequency	-	32.768	-	kHz
t_{OSC32K_ST}⁽³⁾	OSC32K wake-up from sleep start-up time	-	950	-	µs	Device in Power-Down sleep mode, VREGCTRL.PMODE = AUTO
✝ Unless otherwise specified, data in the “Typ.” column is at T_A = 25°C and V_DD = 3.0V. These parameters are not tested and are for design guidance only. Note: To ensure these oscillator frequency tolerances, V_DD and GND must be capacitively decoupled as close to the device as possible. Recommend using 100 nF and 1 μF values in parallel. These parameters are not calibrated. Wake-up times are measured from the wake-up event to code execution.

Figure 46-2. Precision Calibrated OSCHF (f_OSCHF ≥ 4 MHz) Frequency Accuracy Over Device V_DD and Temperature⁽¹⁾

Note: