EFR32MG13 Mighty Gecko Multi-Protocol Wireless SoC Family Data Sheet
Electrical Specifications
4.1.12.2 High-Frequency Crystal Oscillator (HFXO)
Table 4.38. High-Frequency Crystal Oscillator (HFXO)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Crystal frequency
fHFXO
38.4 MHz required for radio trans-
ciever operation
38
38.4
40
MHz
Supported crystal equivalent ESRHFXO_38M4 Crystal frequency 38.4 MHz
series resistance (ESR)
—
6
—
—
60
12
Ω
Supported range of crystal
load capacitance 1
CHFXO_CL
pF
On-chip tuning cap range 2
CHFXO_T
SSHFXO
tHFXO
On each of HFXTAL_N and
HFXTAL_P pins
9
20
0.04
300
—
25
—
—
40
pF
pF
On-chip tuning capacitance
step
—
Startup time
38.4 MHz, ESR = 50 Ohm, CL =
10 pF
—
µs
Frequency tolerance for the FTHFXO
crystal
38.4 MHz, ESR = 50 Ohm, CL =
10 pF
-40
ppm
Note:
1. Total load capacitance as seen by the crystal.
2. The effective load capacitance seen by the crystal will be CHFXO_T /2. This is because each XTAL pin has a tuning cap and the
two caps will be seen in series by the crystal.
4.1.12.3 Low-Frequency RC Oscillator (LFRCO)
Table 4.39. Low-Frequency RC Oscillator (LFRCO)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
ENVREF1 = 1, T ≤ 85 °C
ENVREF1 = 1, T > 85 °C
ENVREF1 = 0, T ≤ 85 °C
ENVREF1 = 0, T > 85 °C
Oscillation frequency
fLFRCO
31.3
32.768
33.6
kHz
31.6
31.3
30
32.768
32.768
32.768
500
36.8
33.4
33.4
—
kHz
kHz
kHz
µs
Startup time
tLFRCO
ILFRCO
—
Current consumption 2
ENVREF = 1 in
CMU_LFRCOCTRL
—
342
—
nA
ENVREF = 0 in
—
494
—
nA
CMU_LFRCOCTRL
Note:
1. In CMU_LFRCOCTRL register.
2. Block is supplied by AVDD if ANASW = 0, or DVDD if ANASW=1 in EMU_PWRCTRL register.
silabs.com | Building a more connected world.
Rev. 1.4 | 84
SILICON [ SILICON ]
