EFM32WG842 Datasheet, PDF (16/78 Pages) Silicon Laboratories – Operation from backup battery when main power drains out

...the world's most energy friendly microcontrollers
Figure 3.7. EM1 Current consumption with all peripheral clocks disabled and HFRCO running
at 1.2MHz
0.138
0.136
0.134
0.132
- 40°C
- 15°C
5°C
25°C
45°C
65°C
85°C
0.130
0.128
0.126
0.124
0.122
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8
Vdd [V]
0.160
0.155
0.150
0.145
0.140
0.135
0.130
0.125
0.120
0.115
–4 0
2.0V
2.2V
2.4V
2.6V
2.8V
3.0V
3.2V
3.4V
3.6V
3.8V
–1 5
5
25
45
65
85
Tem perature [°C]
3.4.2 EM2 Current Consumption
Figure 3.8. EM2 current consumption. RTC¹ prescaled to 1kHz, 32.768 kHz LFRCO.
3.5
- 40.0°C
- 15.0°C
3.0
5.0°C
25.0°C
45.0°C
65.0°C
2.5
85.0°C
2.0
1.5
1.0
0.5
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8
Vdd [V]
3.5
Vdd= 2.0V
Vdd= 2.2V
3.0
Vdd= 2.4V
Vdd= 2.6V
Vdd= 2.8V
Vdd= 3.0V
2.5
Vdd= 3.2V
Vdd= 3.4V
Vdd= 3.6V
2.0
Vdd= 3.8V
1.5
1.0
0.5
–4 0
–2 0
0
20
40
60
80
Tem perature [°C]
1_{Using backup RTC.}
2014-06-13 - EFM32WG842FXX - d0196_Rev1.40
16
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