Datasheet

Electrical characteristics STM32F401xD STM32F401xE
80/135
Figure 25. Typical application with a 32.768 kHz crystal
6.3.9 Internal clock source characteristics
The parameters given in Table 39 and Table 40 are derived from tests performed under
ambient temperature and V
DD
supply voltage conditions summarized in Table 14.
High-speed internal (HSI) RC oscillator
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Table 39. HSI oscillator characteristics
(1)
1. V
DD
= 3.3 V, T
A
= –40 to 105 °C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
f
HSI
Frequency - 16 - MHz
ACC
HSI
Accuracy of the HSI
oscillator
User-trimmed with the RCC_CR
register
(2)
2. Guaranteed by design, not tested in production
--1%
Factory-
calibrated
T
A
= –40 to 105 °C
(3)
3. Guaranteed by characterization, not tested in production
–8 - 4.5 %
T
A
= –10 to 85 °C
(3)
–4 - 4 %
T
A
= 25 °C –1 - 1 %
t
su(HSI)
(2)
HSI oscillator
startup time
-2.24µs
I
DD(HSI)
(2)
HSI oscillator
power consumption
-6080µA
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