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SLWSTK6020A Datasheet, PDF (33/102 Pages) Silicon Laboratories – EFR32BG1 Blue Gecko Bluetooth® Smart SoC Family Data Sheet | |||
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4.1.11 Oscillators
4.1.11.1 LFXO
EFR32BG1 Blue Gecko Bluetooth® Smart SoCFamily Data Sheet
Electrical Specifications
Table 4.19. LFXO
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Crystal frequency
fLFXO
â
32.768
â
kHz
Supported crystal equivalent ESRLFXO
series resistance (ESR)
â
â
70
kâ¦
Supported range of crystal
load capacitance 1
CLFXO_CL
6
â
18
pF
On-chip tuning cap range 2 CLFXO_T
On each of LFXTAL_N and
LFXTAL_P pins
8
â
40
pF
On-chip tuning cap step size SSLFXO
â
0.25
â
pF
Current consumption after
startup 3
ILFXO
ESR = 30 kâ¦, CL=12.5 pF, GAIN4
â
273
â
nA
= 3, AGC4 = 1
Start- up time
tLFXO
ESR=30 kâ¦, CL=12.5 pF, GAIN4
â
308
â
ms
=2
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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