Datasheet

DS9178 Rev 4 51/96
STM8L051F3 Electrical parameters
87
Table 17. Total current consumption in Run mode
Symbol
Para
meter
Conditions
(1)
1. All peripherals OFF, V
DD
from 1.8 V to 3.6 V, HSI internal RC osc. , f
CPU
=f
SYSCLK
Typ
Max
Unit
55 °C 85 °C
I
DD(RUN)
Supply
current
in run
mode
(2)
2. CPU executing typical data processing
All
peripherals
OFF,
code
executed
from RAM,
V
DD
from
1.8 V to 3.6 V
HSI RC osc.
(16 MHz)
(3)
3. The run from RAM consumption can be approximated with the linear formula:
I
DD
(run_from_RAM) = Freq * 90 µA/MHz + 380 µA
f
CPU
= 125 kHz
0.39 0.47 0.49
mA
f
CPU
= 1 MHz
0.48 0.56 0.58
f
CPU
= 4 MHz
0.75 0.84 0.86
f
CPU
= 8 MHz
1.10 1.20 1.25
f
CPU
= 16 MHz
1.85 1.93 2.12
(5)
HSE external
clock
(f
CPU
=f
HSE
)
(4)
f
CPU
= 125 kHz
0.05 0.06 0.09
f
CPU
= 1 MHz
0.18 0.19 0.20
f
CPU
= 4 MHz
0.55 0.62 0.64
f
CPU
= 8 MHz
0.99 1.20 1.21
f
CPU
= 16 MHz
1.90 2.22 2.23
(5)
LSI RC osc.
(typ. 38 kHz)
f
CPU
= f
LSI
0.040 0.045 0.046
LSE external
clock
(32.768 kHz)
f
CPU
= f
LSE
0.035 0.040 0.048
(5)
I
DD(RUN)
Supply
current
in Run
mode
All
peripherals
OFF, code
executed
from Flash,
V
DD
from
1.8 V to 3.6 V
HSI RC
osc.
(6)
f
CPU
= 125 kHz
0.43 0.55 0.56
mA
f
CPU
= 1 MHz
0.60 0.77 0.80
f
CPU
= 4 MHz
1.11 1.34 1.37
f
CPU
= 8 MHz
1.90 2.20 2.23
f
CPU
= 16 MHz
3.8 4.60 4.75
HSE external
clock
(f
CPU
=f
HSE
)
(4)
f
CPU
= 125 kHz
0.30 0.36 0.39
f
CPU
= 1 MHz
0.40 0.50 0.52
f
CPU
= 4 MHz
1.15 1.31 1.40
f
CPU
= 8 MHz
2.17 2.33 2.44
f
CPU
= 16 MHz
4.0 4.46 4.52
LSI RC osc.
f
CPU
= f
LSI
0.110 0.123 0.130
LSE ext. clock
(32.768
kHz)
(7)
f
CPU
= f
LSE
0.100 0.101 0.104
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