STM32F091CB datasheet(62/127 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F091xB STM32F091xC

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DocID026284 Rev 3

I/O system current consumption

The current consumption of the I/O system has two components: static and dynamic.

I/O static current consumption

All the I/Os used as inputs with pull-up generate current consumption when the pin is

externally held low. The value of this current consumption can be simply computed by using

the pull-up/pull-down resistors values given in Table 53: I/O static characteristics.

For the output pins, any external pull-down or external load must also be considered to

estimate the current consumption.

Additional I/O current consumption is due to I/Os configured as inputs if an intermediate

voltage level is externally applied. This current consumption is caused by the input Schmitt

Table 33. Typical current consumption, code executing from Flash memory,

running from HSE 8 MHz crystal

Symbol

Parameter

fHCLK

Typical consumption in

Run mode

Typical consumption in

Sleep mode

Unit

Peripherals

enabled

Peripherals

disabled

Peripherals

enabled

Peripherals

disabled

IDD

Current

consumption

from VDD

supply

48 MHz

26.7

15.1

16.4

3.8

36 MHz

20.4

11.8

12.7

3.3

32 MHz

18.5

11.0

11.4

3.0

24 MHz

14.6

8.7

9.0

2.3

16 MHz

10.2

6.1

6.4

1.8

8 MHz

5.1

3.3

3.2

1.2

4 MHz

3.3

2.2

2.3

1.1

2 MHz

2.2

1.7

1.1

1 MHz

1.6

1.4

1.1

500 kHz

1.4

1.2

1.0

IDDA

Current

consumption

from VDDA

supply

48 MHz

172

μA

36 MHz

131

32 MHz

119

24 MHz

16 MHz

8 MHz

2.7

4 MHz

2.7

2 MHz

2.7

1 MHz

2.7

500 kHz

2.7

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