EFM32WG880 Datasheet, PDF (13/85 Pages) Silicon Laboratories – Operation from backup battery when main power drains out

...the world's most energy friendly microcontrollers
Symbol
Parameter
I_EM3
EM3 current
I_EM4
EM4 current
1_{Using backup RTC.}
Condition
Min
EM2 current with RTC
prescaled to 1 Hz, 32.768
kHz LFRCO, V_DD= 3.0 V,
T_AMB=85°C
V_DD= 3.0 V, T_AMB=25°C
V_DD= 3.0 V, T_AMB=85°C
V_DD= 3.0 V, T_AMB=25°C
V_DD= 3.0 V, T_AMB=85°C
3.4.1 EM1 Current Consumption
Typ
Max
Unit
3.0¹
4.0¹ µA
0.65
1.3 µA
2.65
4.0 µA
0.02
0.055 µA
0.44
0.9 µA
Figure 3.1. EM1 Current consumption with all peripheral clocks disabled and HFXO running at
48MHz
3.15
3.15
3.10
3.10
3.05
3.00
- 40°C
- 15°C
5°C
2.95
25°C
45°C
65°C
85°C
2.90
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8
Vdd [V]
3.05
3.00
2.95
2.90
–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]
Figure 3.2. EM1 Current consumption with all peripheral clocks disabled and HFRCO running
at 28MHz
1.85
1.80
1.75
1.70
- 40°C
- 15°C
5°C
1.65
25°C
45°C
65°C
85°C
1.60
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8
Vdd [V]
1.85
1.80
1.75
1.70
1.65
1.60
–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]
2014-06-13 - EFM32WG880FXX - d0197_Rev1.40
13
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