EZR32LG330 Datasheet, PDF (33/87 Pages) Silicon Laboratories – Building and home automation

4.10.5 AUXHFRCO
EZR32LG330 Data Sheet
Electrical Specifications
Table 4.14. AUXHFRCO
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
28 MHz frequency band
27.5
28.0
28.5
MHz
21 MHz frequency band
20.6
21.0
21.4
MHz
Oscillation frequency, V_DD=
3.0 V, T_AMB=25 °C
f_AUXHFRCO
14 MHz frequency band
11 MHz frequency band
13.7
14.0
14.3
MHz
10.8
11.0
11.2
MHz
7 MHz frequency band
6.48¹
6.60¹
6.72¹
MHz
1 MHz frequency band
1.15²
1.20²
1.25²
MHz
Settling time after start-up
t_AUXHFR-
CO_settling
f_AUXHFRCO = 14 MHz
─
0.6
─
Cycles
Frequency step for LSB
change in TUNING value
TUNE-
STEP_AUXHFR
CO
─
0.3³
─
%
Note:
1. For devices with prod. rev. < 19, Typ = 7 MHz and Min/Max values not applicable.
2. For devices with prod. rev. < 19, Typ = 1 MHz and Min/Max values not applicable.
3. The TUNING field in the CMU_AUXHFRCOCTRL register may be used to adjust the AUXHFRCO frequency. There is enough
adjustment range to ensure that the frequency bands above 7 MHz will always have some overlap across supply voltage and
temperature. By using a stable frequency reference such as the LFXO or HFXO, a firmware calibration routine can vary the TUN-
ING bits and the frequency band to maintain the AUXHFRCO frequency at any arbitrary value between 7 MHz and 28 MHz
across operating conditions.
4.10.6 ULFRCO
Parameter
Oscillation frequency
Temperature coefficient
Supply voltage coefficient
Symbol
f_ULFRCO
TC_ULFRCO
VC_ULFRCO
Table 4.15. ULFRCO
Test Condition
25 °C, 3 V
Min
Typ
Max
Unit
0.7
1.75
kHz
─
0.05
─
%/°C
─
-18.2
─
%/V
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