Internal Clock Source Characteristics; Table 38. Hsi Oscillator Characteristics; Figure 19. Hsi Oscillator Accuracy Characterization Results - STMicroelectronics STM32F042G4 Manual

STM32F042xx
6.3.8

Internal clock source characteristics

The parameters given in
temperature and supply voltage conditions summarized in
conditions. The provided curves are characterization results, not tested in production.
High-speed internal (HSI) RC oscillator
Symbol
f
HSI
TRIM
DuCy
(HSI)
ACC
HSI
t
su(HSI)
I
DDA(HSI)
1. V = 3.3 V, T
DDA
2. Guaranteed by design, not tested in production.
3. Data based on characterization results, not tested in production.
Table 38 are derived from tests performed under ambient

Table 38. HSI oscillator characteristics

Parameter
Frequency
HSI user trimming step
Duty cycle
Accuracy of the HSI
oscillator (factory
calibrated)
HSI oscillator startup
time
HSI oscillator power
consumption
= –40 to 105 °C unless otherwise specified.
A

Figure 19. HSI oscillator accuracy characterization results

DocID025832 Rev 2
Table 21: General operating
Conditions
T = –40 to 105 °C
A
T = –10 to 85 °C
A
T = 0 to 70 °C
A
T = 25 °C
A
Electrical characteristics
(1)
Min Typ Max
- 8 -
(2)
- - 1
(2) (2)
45 - 55
(3) (3)
–3.8 - 4.6
(3) (3)
–2.9 - 2.9
(3) (3)
–2.3 - 2.2
–1 - 1
(2) (2)
1 - 2
(2)
- 80 100
Unit
MHz
%
%
%
%
%
%
μs
μA
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