STMicroelectronics STM32F042C4, Manual

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STM32F042xx Electrical characteristics
94
6.3.8 Internal clock source characteristics
The parameters given in Table 38 are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 21: General operating
conditions . The provided curves are characterization results, not tested in production.
High-speed internal (HSI) RC oscillator
Figure 19. HSI oscillator accuracy characterization results
Table 38. 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 (factory
calibrated)
T
A
= –40 to 105 °C –3.8
(3)
3. Data based on characterization results, not tested in production.
- 4.6
(3)
%
T
A
= –10 to 85 °C –2.9
(3)
- 2.9
(3)
%
T
A
= 0 to 70 °C –2.3
(3)
- 2.2
(3)
%
T
A
= 25 °C –1 - 1 %
t
su(HSI)
HSI oscillator startup
time
1
(2)
- 2
(2)
μ s
I
DDA(HSI)
HSI oscillator power
consumption
- 80 100
(2)
μ A
-36
-!8
-).
4; #=
!