STMicroelectronics STM32F031C4, Manual

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Electrical characteristics STM32F031x4 STM32F031x6
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6.3.8 Internal clock source characteristics
The parameters given in Table 35 are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 18: General operating
conditions . The provided curves are characterization results, not tested in production.
High-speed internal (HSI) RC oscillator
Figure 18. HSI oscillator accuracy characterization results for soldered parts
Table 35. HSI oscillator characteristics
(1)
1. V
DDA
= 3.3 V, T
A
= -40 to 105°C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
f
HSI
Frequency - - 8 - MHz
TRIM HSI user trimming step - - - 1
(2)
2. Guaranteed by design, not tested in production.
%
DuCy
(HSI)
Duty cycle - 45
(2)
- 55
(2)
%
ACC
HSI
Accuracy of the HSI
oscillator
T
A
= -40 to 105°C -2.8
(3)
3. Data based on characterization results, not tested in production.
- 3.8
(3)
%
T
A
= -10 to 85°C -1.9
(3)
- 2.3
(3)
T
A
= 0 to 85°C -1.9
(3)
- 2
(3)
T
A
= 0 to 70°C -1.3
(3)
- 2
(3)
T
A
= 0 to 55°C -1
(3)
- 2
(3)
T
A
= 25°C -1
(4)
4. Factory calibrated, parts not soldered.
- 1
(4)
t
su(HSI)
HSI oscillator startup time - 1
(2)
- 2
(2)
µs
I
DDA(HSI)
HSI oscillator power
consumption
- - 80 100
(2)
µA
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