EFR32MG1B732F256 Datasheet, PDF(36/94 Page) Silicon Laboratories – EFR32MG1 Mighty Gecko SoC with Integrated Serial Flash Data Sheet

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EFR32MG1B732F256 Datasheet, PDF (36/94 Pages) Silicon Laboratories – EFR32MG1 Mighty Gecko SoC with Integrated Serial Flash Data Sheet

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4.1.11 Oscillators

4.1.11.1 LFXO

EFR32MG1 Mighty Gecko SoC with Integrated Serial Flash Data Sheet

Electrical Specifications

Table 4.18. LFXO

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Crystal frequency

fLFXO

32.768

kHz

Supported crystal equivalent ESRLFXO

series resistance (ESR)

kâ¦

Supported range of crystal

load capacitance 1

CLFXO_CL

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

Current consumption after

startup 3

ILFXO

ESR = 70 kâ¦, CL = 7 pF, GAIN4 =

273

3, AGC4 = 1

Start- up time

tLFXO

ESR=70 kâ¦, CL=7 pF, GAIN4 =2

308

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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