Datasheet

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STM8S105x4/6 Electrical characteristics
90
10.3.1 VCAP external capacitor
The stabilization for the main regulator is achieved by connecting an external capacitor
C
EXT
to the V
CAP
pin. C
EXT
is specified in Table 18. Care should be taken to limit the series
inductance to less than 15 nH.
Figure 12. External capacitor C
EXT
1. ESR is the equivalent series resistance and ESL is the equivalent inductance.
10.3.2 Supply current characteristics
The current consumption is measured as illustrated in Figure 10: Pin input voltage.
Total current consumption in run mode
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5/HDN
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&
Table 20. Total current consumption with code execution in run mode at V
DD
= 5 V
Symbol Parameter Conditions Typ
Max
(1)
Unit
I
DD(RUN)
Supply
current in
Run mode,
code
executed
from RAM
f
CPU
= f
MASTER
= 16 MHz
HSE crystal osc. (16 MHz) 3.2 -
mA
HSE user ext. clock
(16 MHz)
2.6 3.2
HSI RC osc. (16 MHz) 2.5 3.2
f
CPU
= f
MASTER
/128 = 125 kHz
HSE user ext. clock
(16 MHz)
1.6 2.2
HSI RC osc. (16 MHz) 1.3 2.0
f
CPU
= f
MASTER
/128 =
15.625 kHz
HSI RC osc. (16 MHz/8) 0.75 -
f
CPU
= f
MASTER
= 128 kHz
LSI RC osc. (128 kHz) 0.55 -
I
DD(RUN)
Supply
current in
Run mode,
code
executed
from Flash
f
CPU
= f
MASTER
= 16 MHz
HSE crystal osc. (16 MHz) 7.7 -
mA
HSE user ext. clock
(16 MHz)
7.0 8.0
HSI RC osc. (16 MHz) 7.0 8.0
f
CPU
= f
MASTER
= 2 MHz
HSI RC osc. (16 MHz/8)
(2)
1.5 -
f
CPU
= f
MASTER
/128 = 125 kHz HSI RC osc. (16 MHz) 1.35 2.0
f
CPU
= f
MASTER
/128 =
15.625 kHz
HSI RC osc. (16 MHz/8) 0.75 -
f
CPU
= f
MASTER
= 128 kHz
LSI RC osc. (128 kHz) 0.6 -
1. Data based on characterization results, not tested in production.
2. Default clock configuration measured with all peripherals off.
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