EFM8BB2 Datasheet, PDF (17/55 Pages) Silicon Laboratories – The EFM8BB2 highlighted features are listed below

4.1.6 Internal Oscillators
Table 4.6. Internal Oscillators
Parameter
Symbol
Test Condition
High Frequency Oscillator 0 (24.5 MHz)
Oscillator Frequency
f_HFOSC0
Full Temperature and Supply
Range
Power Supply Sensitivity
PSS_HFOS T_A = 25 °C
C0
Temperature Sensitivity
TS_HFOSC0 V_DD = 3.0 V
High Frequency Oscillator 1 (49 MHz)
Oscillator Frequency
f_HFOSC1
Full Temperature and Supply
Range
Power Supply Sensitivity
PSS_HFOS T_A = 25 °C
C1
Temperature Sensitivity
TS_HFOSC1 V_DD = 3.0 V
Low Frequency Oscillator (80 kHz)
Oscillator Frequency
f_LFOSC
Full Temperature and Supply
Range
Power Supply Sensitivity
PSS_LFOSC T_A = 25 °C
Temperature Sensitivity
TS_LFOSC V_DD = 3.0 V
Min
24
—
—
48.25
—
—
75
—
—
4.1.7 External Clock Input
Table 4.7. External Clock Input
Parameter
Symbol
Test Condition
Min
External Input CMOS Clock
f_CMOS
0
Frequency (at EXTCLK pin)
External Input CMOS Clock High t_CMOSH
9
Time
External Input CMOS Clock Low
t_CMOSL
9
Time
EFM8BB2 Data Sheet
Electrical Characteristics
Typ
Max
Unit
24.5
25
MHz
0.5
—
%/V
40
—
ppm/°C
49
49.75
MHz
0.02
—
%/V
45
—
ppm/°C
80
85
kHz
0.05
—
%/V
65
—
ppm/°C
Typ
Max
Unit
—
50
MHz
—
—
ns
—
—
ns
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