Datasheet

Electrical characteristics STM32L031x4/6
72/126 DS10668 Rev 6
6.3.7 Internal clock source characteristics
The parameters given in Table 41 are derived from tests performed under ambient
temperature and V
DD
supply voltage conditions summarized in Table 20.
High-speed internal 16 MHz (HSI16) RC oscillator
Table 41. 16 MHz HSI16 oscillator characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
HSI16
Frequency V
DD
= 3.0 V - 16 - MHz
TRIM
(1)(2)
1. The trimming step differs depending on the trimming code. It is usually negative on the codes which are
multiples of 16 (0x00, 0x10, 0x20, 0x30...0xE0).
HSI16 user-
trimmed resolution
Trimming code is not a multiple of
16
- ± 0.4 0.7 %
Trimming code is a multiple of 16 - - ± 1.5 %
ACC
HSI16
(2)
2. Guaranteed by characterization results.
Accuracy of the
factory-calibrated
HSI16 oscillator
V
DDA
= 3.0 V, T
A
= 25 °C –1
(3)
3. Guaranteed by test in production.
-1
(3)
%
V
DDA
= 3.0 V, T
A
= 0 to 55 °C –1.5 - 1.5 %
V
DDA
= 3.0 V, T
A
= -10 to 70 °C –2 - 2 %
V
DDA
= 3.0 V, T
A
= -10 to 85 °C –2.5 - 2 %
V
DDA
= 3.0 V, T
A
= -10 to 105 °C –4 - 2 %
V
DDA
= 1.65 V to 3.6 V
T
A
= -40 to 125 °C
–5.45 - 3.25 %
t
SU(HSI16)
(2)
HSI16 oscillator
startup time
- - 3.7 6 µs
I
DD(HSI16)
(2)
HSI16 oscillator
power consumption
- - 100 140 µA
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