EFR32MG13 Mighty Gecko Multi-Protocol Wireless SoC Family Data Sheet
Electrical Specifications
4.1.12 Oscillators
4.1.12.1 Low-Frequency Crystal Oscillator (LFXO)
Table 4.37. Low-Frequency Crystal Oscillator (LFXO)
Parameter
Symbol
Test Condition
Min
—
Typ
32.768
—
Max
—
Unit
kHz
kΩ
Crystal frequency
fLFXO
Supported crystal equivalent ESRLFXO
series resistance (ESR)
—
70
Supported range of crystal
load capacitance 1
CLFXO_CL
6
8
—
—
18
40
pF
pF
On-chip tuning cap range 2
CLFXO_T
On each of LFXTAL_N and
LFXTAL_P pins
On-chip tuning cap step size SSLFXO
—
—
0.25
273
—
—
pF
nA
Current consumption after
startup 3
ILFXO
ESR = 70 kOhm, CL = 7 pF,
GAIN4 = 2, AGC4 = 1
Start- up time
tLFXO
ESR = 70 kOhm, CL = 7 pF,
GAIN4 = 2
—
308
—
ms
Note:
1. Total load capacitance as seen by the crystal.
2. The effective load capacitance seen by the crystal will be CLFXO_T /2. This is because each XTAL pin has a tuning cap and the
two caps will be seen in series by the crystal.
3. Block is supplied by AVDD if ANASW = 0, or DVDD if ANASW=1 in EMU_PWRCTRL register.
4. In CMU_LFXOCTRL register.
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