EFM32G280 Datasheet, PDF (32/72 Pages) Silicon Laboratories – Wake-up Interrupt Controller

3.9.5 AUXHFRCO
Table 3.12. AUXHFRCO
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Symbol
Parameter
Condition
Min
Typ
Max
Unit
f_AUXHFRCO
Oscillation frequen-
cy, V_DD= 3.0 V,
T_AMB=25°C
14 MHz frequency band
t_{AUXHFRCO_settling}Settling time after
start-up
f_AUXHFRCO = 14 MHz
13.580
14.0
14.420 MHz
0.6
Cycles
DC_AUXHFRCO Duty cycle
f_AUXHFRCO = 14 MHz
48.5
50
51 %
TUNESTEP_AUX-Frequency step
HFRCO
for LSB change in
TUNING value
0.3¹
%
1_{The TUNING field in the CMU_AUXHFRCOCTRL register may be used to adjust the AUXHFRCO frequency. By using a stable}
frequency reference such as the LFXO or HFXO, a firmware calibration routine can vary the TUNING bits and the frequency band
to maintain the AUXHFRCO frequency at any arbitrary value in the 14 MHz range across operating conditions.
3.9.6 ULFRCO
Table 3.13. ULFRCO
Symbol
f_ULFRCO
TC_ULFRCO
VC_ULFRCO
Parameter
Condition
Oscillation frequen- 25°C, 3V
cy
Temperature coeffi-
cient
Supply voltage co-
efficient
Min
Typ
0.70
Max
Unit
1.75 kHz
0.05
%/°C
-18.2
%/V
3.10 Analog Digital Converter (ADC)
Table 3.14. ADC
Symbol
Parameter
Condition
V_ADCIN
Single ended
Input voltage range
Differential
V_ADCREFIN
Input range of exter-
nal reference volt-
age, single ended
and differential
V_{ADCREFIN_CH7} Input range of ex-
ternal negative ref-
erence voltage on
channel 7
See V_ADCREFIN
V_{ADCREFIN_CH6} Input range of ex-
ternal positive ref-
erence voltage on
channel 6
See V_ADCREFIN
V_ADCCMIN
Common mode in-
put range
I_ADCIN
Input current
2pF sampling capacitors
Min
Typ
0
-V_REF/2
1.25
Max
Unit
V_REF V
V_REF/2 V
V_DD V
0
V_DD - 1.1 V
0.625
V_DD V
0
V_DD V
<100
nA
2015-05-22 - EFM32G280FXX - d0006_Rev1.90
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