Datasheet

STM32F050xx Electrical characteristics
Doc ID 023683 Rev 1 57/97
6.3.7 Internal clock source characteristics
The parameters given in Ta bl e 3 3 are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 15: General operating
conditions. The provided curves are characterization results, not tested in production.
High-speed internal (HSI) RC oscillator
Figure 16. HSI oscillator accuracy characterization results
Table 33. 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)
µs
I
DDA(HSI)
HSI oscillator power
consumption
- 80 100
(2)
µA
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