AN2857 datasheet(21/31 Pages) STMICROELECTRONICS

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AN2857

Power consumption and wakeup time measurements and results

Doc ID 15241 Rev 3

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5.1.2

Power consumption results in run mode

Note:

The results given above are different from those in the datasheets because a different

reference code is used. The reference code used for Flash and RAM execution is the same.

Table 5.

Power consumption results in run mode, code executed from Flash

Symbol

Parameter

Condition

VDD = 3.3 V

VDD = 5 V

Unit

ITOT

Supply current in

run mode

HSE crystal

fCPU = fMASTER = 24 MHz

11.0

11.4

HSE external clock

fCPU = fMASTER = 24 MHz

10.8

HSE crystal

fCPU = fMASTER = 16 MHz

8.4

9.0

HSE external clock

fCPU = fMASTER = 16 MHz

8.2

HSI

fCPU = fMASTER = 16 MHz

8.1

HSI

fCPU = fMASTER/128 = 125 kHz

1.1

LSI

fCPU = fMASTER = 128 kHz

0.55

Table 6.

Power consumption results in run mode, code executed from RAM

Symbol

Parameter

Condition

VDD = 3.3 V

VDD = 5 V

Unit

ITOT

Supply current in

run mode

HSE crystal

fCPU = fMASTER = 24 MHz

5.2

5.6

HSE external clock

fCPU = fMASTER = 24 MHz

5.0

HSE crystal

fCPU = fMASTER = 16 MHz

3.7

4.1

HSE external clock

fCPU = fMASTER = 16 MHz

3.5

HSI

fCPU = fMASTER = 16 MHz

3.4

HSI

fCPU = fMASTER/128 = 125 kHz

1.0

LSI

fCPU = fMASTER = 128 kHz

0.47

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