Datasheet

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STM32F070xB STM32F070x6 Electrical characteristics
75
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 21: General operating
conditions. The provided curves are characterization results, not tested in production.
High-speed internal (HSI) RC oscillator
High-speed internal 14 MHz (HSI14) RC oscillator (dedicated to ADC)
Table 35. HSI oscillator characteristics
(1)
1. V
DDA
= 3.3 V, T
A
= -40 to 85°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 85°C - ±5 - %
T
A
= 25°C - ±1
(3)
3. With user calibration.
-%
t
SU(HSI)
HSI oscillator startup time - 1
(2)
-2
(2)
μs
I
DDA(HSI)
HSI oscillator power
consumption
- - 80 - μA
Table 36. HSI14 oscillator characteristics
(1)
1. V
DDA
= 3.3 V, T
A
= -40 to 85 °C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
f
HSI14
Frequency - 14 - MHz
TRIM HSI14 user-trimming step - - 1
(2)
2. Guaranteed by design, not tested in production.
%
DuCy
(HSI14)
Duty cycle 45
(2)
-55
(2)
%
ACC
HSI14
Accuracy of the HSI14
oscillator (factory calibrated)
T
A
= –40 to 85 °C - ±5 %
t
su(HSI14)
HSI14 oscillator startup time 1
(2)
-2
(2)
μs
I
DDA(HSI14)
HSI14 oscillator power
consumption
- 100 - μA
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