STM32WBA50KG datasheet(72/110 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32WBA50KG

72/110

DS14688 Rev 1

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 or pull-down generate current consumption when the

pin is externally held to the opposite level. The value of this current consumption can be

simply computed by using the pull-up/pull-down resistors values given in Section 5.3.16.

For the output pins, any internal or external pull-up or pull-down and external load must also

be considered to estimate the current consumption.

An additional current consumption is due to I/Os configured as inputs when an intermediate

voltage level is applied externally. This is caused by the input Schmitt trigger circuits used to

discriminate the input value. Unless this specific configuration is required by the application,

this supply current consumption can be avoided by configuring these I/Os in analog mode.

This is the case of ADC input pins, which must be configured as analog inputs.

Caution:

Any floating input pin can settle to an intermediate voltage level or switch inadvertently, as a

result of external electromagnetic noise. To avoid current consumption related to floating

pins, they must be configured in analog mode, or forced internally to a definite digital value.

This can be done by using pull-up/down resistors, or by configuring the pins in output mode.

IDD(Standby

with RTC)

Supply current in

Standby mode, no

IWDG,

RTC enabled

Clocked by LSI1, ULPMEN = 0

1.8 V

1.48

1.85

3.78

µA

2.4 V

1.87

2.27

4.30

3.0 V

2.31

2.78

5.06

3.3 V

2.64

3.22

5.86

3.6 V

3.17

4.02

7.27

Clocked by LSI1 / 128,

ULPMEN = 0

1.8 V

1.36

1.74

3.67

2.4 V

1.71

2.12

4.15

3.0 V

2.11

2.58

4.85

3.3 V

2.40

2.98

5.61

3.6 V

2.90

3.75

7.02

Clocked by LSE bypass

32.768 kHz, ULPMEN = 0

1.8 V

1.51

1.89

4.03

2.4 V

1.91

2.32

4.55

3.0 V

2.36

2.84

5.36

3.3 V

2.70

3.28

6.16

3.6 V

3.24

4.06

7.61

Clocked by LSE crystal

32.768 kHz in medium

low-drive, ULPMEN = 0

1.8 V

1.66

1.98

3.43

2.4 V

2.03

2.37

3.90

3.0 V

2.45

2.89

4.77

3.3 V

2.76

3.32

5.54

3.6 V

3.29

4.06

6.84

1. Evaluated by characterization, not tested in production, unless otherwise specified.

Table 43. Current consumption in Standby mode(1) (continued)

Symbol

Parameter

Conditions

Typ

Unit

-VDD

25 °C

55 °C

85 °C

STM32WBA50KG Datasheet(PDF) 72 Page - STMicroelectronics

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