Datasheet

Electrical characteristics STM32L052x6 STM32L052x8
78/143 DocID025936 Rev 8
High-speed internal 48 MHz (HSI48) RC oscillator
Low-speed internal (LSI) RC oscillator
Multi-speed internal (MSI) RC oscillator
Table 47. HSI48 oscillator characteristics
(1)
1. V
DDA
= 3.3 V, T
A
= –40 to 125 °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.
-55
(2)
%
ACC
HSI48
Accuracy of the HSI48
oscillator (factory calibrated
before CRS calibration)
T
A
= 25 °C -4
(3)
3. Guaranteed by characterization results.
-4
(3)
%
t
su(HSI48)
HSI48 oscillator startup time - - 6
(2)
µs
I
DDA(HSI48)
HSI48 oscillator power
consumption
- 330 380
(2)
µA
Table 48. LSI oscillator characteristics
Symbol Parameter Min Typ Max Unit
f
LSI
(1)
1. Guaranteed by test in production.
LSI frequency 26 38 56 kHz
D
LSI
(2)
2. This is a deviation for an individual part, once the initial frequency has been measured.
LSI oscillator frequency drift
0°C ≤ T
A
≤ 85°C
-10 - 4 %
t
su(LSI)
(3)
3. Guaranteed by design.
LSI oscillator startup time - - 200 µs
I
DD(LSI)
(3)
LSI oscillator power consumption - 400 510 nA
Table 49. MSI oscillator characteristics
Symbol Parameter Condition Typ Max Unit
f
MSI
Frequency after factory calibration, done at
V
DD
= 3.3 V and T
A
= 25 °C
MSI range 0 65.5 -
kHz
MSI range 1 131 -
MSI range 2 262 -
MSI range 3 524 -
MSI range 4 1.05 -
MHzMSI range 5 2.1 -
MSI range 6 4.2 -
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