STM8S105C4 datasheet(57/121 Pages) STMICROELECTRONICS

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STM8S105x4/6

Electrical characteristics

10.3.1

VCAP external capacitor

The stabilization for the main regulator is achieved by connecting an external capacitor

CEXT to the VCAP pin. CEXT is specified in Table 18. Care should be taken to limit the series

inductance to less than 15 nH.

Figure 12. External capacitor CEXT

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

Table 20. Total current consumption with code execution in run mode at VDD = 5 V

Symbol

Parameter

Conditions

Typ

Max(1)

Unit

IDD(RUN)

Supply

current in

Run mode,

code

executed

from RAM

fCPU = fMASTER = 16 MHz

HSE crystal osc. (16 MHz)

3.2

HSE user ext. clock

(16 MHz)

2.6

3.2

HSI RC osc. (16 MHz)

2.5

3.2

fCPU = fMASTER /128 = 125 kHz

HSE user ext. clock

(16 MHz)

1.6

2.2

HSI RC osc. (16 MHz)

1.3

2.0

fCPU = fMASTER /128 =

15.625 kHz

HSI RC osc. (16 MHz/8)

0.75

fCPU = fMASTER = 128 kHz

LSI RC osc. (128 kHz)

0.55

IDD(RUN)

Supply

current in

Run mode,

code

executed

from Flash

fCPU = fMASTER = 16 MHz

HSE crystal osc. (16 MHz)

7.7

HSE user ext. clock

(16 MHz)

7.0

8.0

HSI RC osc. (16 MHz)

7.0

8.0

fCPU = fMASTER = 2 MHz

HSI RC osc. (16 MHz/8)(2)

1.5

fCPU = fMASTER /128 = 125 kHz HSI RC osc. (16 MHz)

1.35

2.0

fCPU = fMASTER /128 =

15.625 kHz

HSI RC osc. (16 MHz/8)

0.75

fCPU = fMASTER = 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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