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2013-06-28 - EFM32G230FXX - d0005_Rev1.60
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3.9.4 HFRCO
Table 3.12. HFRCO
Symbol
Parameter
Condition
Min
Typ
Max
Unit
28 MHz frequency band
28
MHz
21 MHz frequency band
21
MHz
14 MHz frequency band
14
MHz
11 MHz frequency band
11
MHz
7 MHz frequency band
6.6
1
MHz
fHFRCO
Oscillation frequency, VDD=
3.0 V, TAMB=25°C
1 MHz frequency band
1.2
2
MHz
tHFRCO_settling
Settling time after start-up
fHFRCO = 14 MHz
0.6
Cycles
fHFRCO = 28 MHz
106
A
fHFRCO = 21 MHz
93
A
fHFRCO = 14 MHz
77
A
fHFRCO = 11 MHz
72
A
fHFRCO = 6.6 MHz
63
A
IHFRCO
Current consumption
fHFRCO = 1.2 MHz
22
A
DCHFRCO
Duty cycle
fHFRCO = 14 MHz
48.5
50
51
%
fHFRCO = 14 MHz
±0.01
3
%/°C
fHFRCO = 28 MHz
±0.005
3
%/°C
fHFRCO = 21 MHz
±0.01
3
%/°C
fHFRCO = 11 MHz
±0.02
3
%/°C
fHFRCO = 6.6 MHz
±0.02
3
%/°C
TCHFRCO
Temperature coefficient,
VDD= 3.0 V
fHFRCO = 1.2 MHz
±0.06
3
%/°C
fHFRCO = 14 MHz
±0.32
4
%/V
fHFRCO = 28 MHz
±0.52
4
%/V
fHFRCO = 21 MHz
±0.25
4
%/V
fHFRCO = 11 MHz
±0.28
4
%/V
fHFRCO = 6.6 MHz
±0.3
4
%/V
VCHFRCO
Supply voltage coefficient,
TAMB=25°C
fHFRCO = 1.2 MHz
±15
4
%/V
TUNESTEPH-
FRCO
Frequency step for LSB
change in TUNING value
0.3
%
17 MHz for devices with prod. rev. < 19.
21 MHz for devices with prod. rev. < 19.
3Calculated using (max(-40°C - 85°C) - min(-40°C - 85°C)) / f_
HFRCO / (85°C - (-40°C))
4Calculated using (max(1.8V - 3.8V) - min(1.8V - 3.8V)) / f_
HFRCO / (3.8V - 1.8V))