Preliminary
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3.9.4 HFRCO
Table 3.11. HFRCO
Symbol
Parameter
Condition
Min
Typ
Max
Unit
21 MHz frequency band
14 MHz frequency band
11 MHz frequency band
7 MHz frequency band
1 MHz frequency band
fHFRCO = 14 MHz
21
14
MHz
MHz
MHz
MHz
MHz
Cycles
Oscillation frequen-
cy, VDD= 3.0 V,
TAMB=25°C
fHFRCO
11
6.6
1.2
0.6
tHFRCO_settling Settling time after
start-up
fHFRCO = 21 MHz
fHFRCO = 14 MHz
fHFRCO = 11 MHz
fHFRCO = 6.6 MHz
fHFRCO = 1.2 MHz
fHFRCO = 14 MHz
93
77
72
63
22
50
0.3
µA
µA
µA
µA
µA
%
Current consump-
tion
IHFRCO
DCHFRCO
Duty cycle
48.5
51
TUNESTEPH- Frequency step
%
for LSB change in
FRCO
TUNING value
Figure 3.21. Calibrated HFRCO 11 MHz Band Frequency vs Supply Voltage and Temperature
11.15
11.10
11.05
11.00
10.95
10.90
10.85
10.80
11.20
11.15
11.10
11.05
11.00
10.95
10.90
10.85
10.80
1.8 V
3 V
3.8 V
- 40°C
25°C
85°C
1.8
2.2
2.6
3.0
3.4
3.8
–40
–15
5
25
45
65
85
Vdd [V]
Temperature [°C]
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2013-10-09 - EFM32ZG108FXX - d0063_Rev0.60
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