37.9.4 Internal RC Oscillator (OSCHF)

Table 37-16. Internal RC Oscillator (OSCHF) Electrical Specifications
Standard operating conditions: VDDIO = AVDD = 1.8V to 5.5V (Unless otherwise stated)

Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial

Param. No.SymbolCharacteristicsMin.Typ.Max.UnitsConditions
OSCHF_1fOSCHFPrecision calibrated OSCHF oscillator frequency-5—5%fOSCHF ≥ 4 MHz

-40°C ≤ TA ≤ 0°C

-2—2%fOSCHF ≥ 4 MHz

0°C ≤ TA ≤ +60°C

-3—3%fOSCHF ≥ 4 MHz

+60°C ≤ TA ≤ +85°C

OSCHF_2(1)fOSCHFOSCHF oscillator frequency—1—MHzOSCCTRL.OSCHFCTRL.FRQSEL = 0x00
—2—MHzOSCCTRL.OSCHFCTRL.FRQSEL = 0x01
—3—MHzOSCCTRL.OSCHFCTRL.FRQSEL = 0x02
OSCHF_5OSCHFDutyOSCHF oscillator duty cycle40—60%
OSCHF_6OSCHFDutyOSCHF oscillator tune step size—0.4—%
OSCHF_7OSCHFSTOSCHF oscillator start-up time—2430µsSUPC.VREG.RUNSTDBY = 0
—120180µsSUPC.VREG.RUNSTDBY = 1
Note:
  1. These OSCHF settings are not calibrated.