Datasheet

Electrical characteristics STM32F091xB STM32F091xC
74/128 DocID026284 Rev 4
High-speed internal 48 MHz (HSI48) RC oscillator
Figure 21. HSI48 oscillator accuracy characterization results
Table 43. HSI48 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
HSI48
Frequency - - 48 - MHz
TRIM HSI48 user-trimming step - 0.09
(2)
0.14 0.2
(2)
%
DuCy
(HSI48)
Duty cycle - 45
(2)
2. Guaranteed by design, not tested in production.
-55
(2)
%
ACC
HSI48
Accuracy of the HSI48
oscillator (factory calibrated)
T
A
= –40 to 105 °C -4.9
(3)
3. Data based on characterization results, not tested in production.
-4.7
(3)
%
T
A
= –10 to 85 °C -4.1
(3)
-3.7
(3)
%
T
A
= 0 to 70 °C -3.8
(3)
-3.4
(3)
%
T
A
= 25 °C -2.8 - 2.9 %
t
su(HSI48)
HSI48 oscillator startup time - - - 6
(2)
µs
I
DDA(HSI48)
HSI48 oscillator power
consumption
- - 312 350
(2)
µA
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