EZR32WG330 Datasheet, PDF (26/87 Pages) Silicon Laboratories – Building and home automation

4.10 Oscillators
EZR32WG330 Data Sheet
Electrical Specifications
4.10.1 LXFO
Table 4.10. LFXO
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Supported nominal crystal fre-
quency
f_LFXO
─
32.768
─
kHz
Supported crystal equivalent
series resistance (ESR)
ESR_LFXO
─
30
120
kΩ
Supported crystal external load
range
C_LFXOL
X¹
─
25
pF
Duty cycle
DC_LFXO
48
50
53.5
%
Current consumption for core
I_LFXO
ESR=30 kΩ, C_L=10 pF, LFXO-
─
190
─
nA
and buffer after startup
BOOST in CMU_CTRL is 1
Start- up time
t_LFXO
ESR=30 kΩ, C_L=10 pF, 40% -
─
400
─
ms
60% duty cycle has been
reached, LFXOBOOST in
CMU_CTRL is 1
Note:
1. See Minimum Load Capacitance (C_LFXOL) Requirement For Safe Crystal Startup in energyAware Designer in Simplicity Studio.
For safe startup of a given crystal, the energyAware Designer in Simplicity Studio contains a tool to help users configure both load ca-
pacitance and software settings for using the LFXO. For details regarding the crystal configuration, the reader is referred to application
note AN0016: EFM32 Oscillator Design Consideration.
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