Datasheet

DocID029968 Rev 3 135/210
STM32L452xx Electrical characteristics
186
Figure 24. HSI48 frequency versus temperature
Low-speed internal (LSI) RC oscillator
N
T
jitter
Next transition jitter
Accumulated jitter on 28 cycles
(4)
--+/-0.15
(2)
-ns
P
T
jitter
Paired transition jitter
Accumulated jitter on 56 cycles
(4)
--+/-0.25
(2)
-ns
1. V
DD
= 3 V, T
A
= –40 to 125°C unless otherwise specified.
2. Guaranteed by design.
3. Guaranteed by characterization results.
4. Jitter measurement are performed without clock source activated in parallel.
Table 61. HSI48 oscillator characteristics
(1)
(continued)
Symbol Parameter Conditions Min Typ Max Unit
06Y9







         
$YJ PLQ PD[
&

Table 62. LSI oscillator characteristics
(1)
Symbol Parameter Conditions Min Typ Max Unit
f
LSI
LSI Frequency
V
DD
= 3.0 V, T
A
= 30 °C 31.04 - 32.96
kHz
V
DD
= 1.62 to 3.6 V, T
A
= -40 to 125 °C 29.5 - 34
t
SU
(LSI)
(2)
LSI oscillator start-
up time
--80130s
t
STAB
(LSI)
(2)
LSI oscillator
stabilization time
5% of final frequency - 125 180 s
I
DD
(LSI)
(2)
LSI oscillator power
consumption
--110180nA
1. Guaranteed by characterization results.
2. Guaranteed by design.
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