Datasheet

DocID17943 Rev 6 91/134
STM8L15xx8, STM8L15xR6 Electrical parameters
121
Figure 22. LSE oscillator circuit diagram
Internal clock sources
Subject to general operating conditions for V
DD
, and T
A
.
High speed internal RC oscillator (HSI)
In the following table, data are based on characterization results, not tested in production,
unless otherwise specified.
4. t
SU(LSE)
is the startup time measured from the moment it is enabled (by software) to a stabilized 32.768 kHz oscillation.
This value is measured for a standard crystal resonator and it can vary significantly with the crystal manufacturer.
OSC_OUT
OSC_IN
f
LSE

C
L1
C
L2
R
F
STM8
Resonator
Consumption
control
g
m
R
m
C
m
L
m
C
O
Resonator
MS32624V1
Table 33. HSI oscillator characteristics
Symbol Parameter
Conditions
(1)
Min. Typ. Max. Unit
f
HSI
Frequency V
DD
= 3.0 V 16 MHz
ACC
HSI
Accuracy of HSI
oscillator (factory
calibrated)
V
DD
= 3.0 V, T
A
= 25 °C -1
(2)
1
(2)
%
V
DD
= 3.0 V, 0 °C ≤ T
A
≤ 55 °C -1.5 1.5 %
V
DD
= 3.0 V, -10 °C ≤ T
A
≤ 70 °C -2 2 %
V
DD
= 3.0 V, -10 °C ≤ T
A
≤ 85 °C -2.5 2 %
V
DD
= 3.0 V, -10 °C ≤ T
A
≤ 125 °C -4.5 2 %
1.65 V ≤ V
DD
≤ 3.6 V,
-40 °C ≤ T
A
≤ 125 °C
-4.5 3 %
TRIM
HSI user trimming
step
(3)
Trimming code ≠ multiple of 16 0.4 0.7 %
Trimming code = multiple of 16 ± 1.5 %
t
su(HSI)
HSI oscillator setup
time (wakeup time)
3.7 6
(4)
µs
I
DD(HSI)
HSI oscillator power
consumption
100 140
(4)
µA
1. V
DD
= 3.0 V, T
A
= -40 to 125 °C unless otherwise specified.
2. Tested in production.