EFM32GG330 Datasheet, PDF (24/71 Pages) List of Unclassifed Manufacturers – EFM32GG330 DATASHEET

...the world's most energy friendly microcontrollers
Figure 3.7. Calibrated LFRCO Frequency vs Temperature and Supply Voltage
42
- 40°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 perature [°C]
3.9.4 HFRCO
Table 3.12. HFRCO
Symbol
Parameter
Condition
Min
Typ
Max
Unit
28 MHz frequency band
27.5
28.0
28.5 MHz
21 MHz frequency band
20.6
21.0
21.4 MHz
f_HFRCO
Oscillation frequen-
cy, V_DD= 3.0 V,
T_AMB=25°C
14 MHz frequency band
11 MHz frequency band
7 MHz frequency band
1 MHz frequency band
13.7
10.8
6.48¹
1.15²
14.0
11.0
6.60¹
1.20²
14.3 MHz
11.2 MHz
6.72¹ MHz
1.25² MHz
t_{HFRCO_settling} Settling time after
start-up
f_HFRCO = 14 MHz
0.6
Cycles
f_HFRCO = 28 MHz
165
190 µA
f_HFRCO = 21 MHz
134
155 µA
I_HFRCO
Current consump- _{fHFRCO = 14 MHz}
tion (Production test
condition = 14MHz) ^fHFRCO ^{= 11 MHz}
106
120 µA
94
110 µA
f_HFRCO = 6.6 MHz
77
90 µA
f_HFRCO = 1.2 MHz
25
32 µA
DC_HFRCO
Duty cycle
f_HFRCO = 14 MHz
48.5
50
51 %
TUNESTEP_H- Frequency step
FRCO
for LSB change in
TUNING value
0.3³
%
1_{For devices with prod. rev. < 19, Typ = 7MHz and Min/Max values not applicable.}
2_{For devices with prod. rev. < 19, Typ = 1MHz and Min/Max values not applicable.}
3_{The TUNING field in the CMU_HFRCOCTRL register may be used to adjust the HFRCO frequency. There is enough adjustment}
range to ensure that the frequency bands above 7 MHz will always have some overlap across supply voltage and temperature. By
using a stable frequency reference such as the LFXO or HFXO, a firmware calibration routine can vary the TUNING bits and the
frequency band to maintain the HFRCO frequency at any arbitrary value between 7 MHz and 28 MHz across operating conditions.
2014-05-23 - EFM32GG330FXX - d0038_Rev1.30
24
www.silabs.com