Datasheet

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STM32F051x4 STM32F051x6 STM32F051x8 Electrical characteristics
90
High-speed internal 14 MHz (HSI14) RC oscillator (dedicated to ADC)
Figure 20. HSI14 oscillator accuracy characterization results
Table 38. HSI14 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
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 105 °C –4.2
(3)
3. Data based on characterization results, not tested in production.
-5.1
(3)
%
T
A
= –10 to 85 °C –3.2
(3)
-3.1
(3)
%
T
A
= 0 to 70 °C –2.5
(3)
-2.3
(3)
%
T
A
= 25 °C –1 - 1 %
t
su(HSI14)
HSI14 oscillator startup time - 1
(2)
-2
(2)
µs
I
DDA(HSI14)
HSI14 oscillator power
consumption
--100150
(2)
µA
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