EFM32WG990 Datasheet, PDF (32/80 Pages) List of Unclassifed Manufacturers – The EFM32 MCUs are the world’s most energy friendly microcontrollers.

Preliminary
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Figure 3.23. Calibrated LFRCO Frequency vs Temperature and Supply Voltage
42
-4 0 ° C
25°C
40
85°C
38
36
34
32
30
1.8
2.2
2.6
3.0
3.4
3.8
Vdd [V]
42
40
38
36
34
32
30
–4 0
1.8 V
3V
3.8 V
–1 5
5
25
45
65
85
Tem perat ure [ ° C]
3.9.4 HFRCO
Table 3.13. HFRCO
Symbol
Parameter
Condition
28 MHz frequency band
21 MHz frequency band
f_HFRCO
Oscillation frequency, V_DD= ^{14 MHz frequency band}
3.0 V, T_AMB=25°C
11 MHz frequency band
7 MHz frequency band
1 MHz frequency band
t_{HFRCO_settling} Settling time after start-up
I_HFRCO
Current consumption
DC_HFRCO
Duty cycle
TUNESTEP_H- Frequency step for LSB
FRCO
change in TUNING value
f_HFRCO = 14 MHz
f_HFRCO = 28 MHz
f_HFRCO = 21 MHz
f_HFRCO = 14 MHz
f_HFRCO = 11 MHz
f_HFRCO = 6.6 MHz
f_HFRCO = 1.2 MHz
f_HFRCO = 14 MHz
Min
Typ
Max
Unit
28
MHz
21
MHz
14
MHz
11
MHz
6.6
MHz
1.2
MHz
0.6
Cycles
106
µA
93
µA
77
µA
72
µA
63
µA
22
µA
48.5
50
51 %
0.3
%
2013-05-06 - EFM32WG990FXX - d0203_Rev1.10
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