STM32G030F6 datasheet(47/94 Pages) STMICROELECTRONICS

47 / 94 page

DS12991 Rev 1

47/94

STM32G030x6/x8

Electrical 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

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 notably the case of ADC input pins which should be

configured as analog inputs.

Caution:

Any floating input pin can also 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 either be configured in analog mode, or forced internally to a definite

digital value. This can be done either by using pull-up/down resistors or by configuring the

pins in output mode.

I/O dynamic current consumption

In addition to the internal peripheral current consumption measured previously (see

Table 31: Current consumption of peripherals, the I/Os used by an application also

contribute to the current consumption. When an I/O pin switches, it uses the current from

the I/O supply voltage to supply the I/O pin circuitry and to charge/discharge the capacitive

load (internal or external) connected to the pin:

where

ISW is the current sunk by a switching I/O to charge/discharge the capacitive load

VDDIO1 is the I/O supply voltage

fSW is the I/O switching frequency

C is the total capacitance seen by the I/O pin: C = CINT+ CEXT + CS

CS is the PCB board capacitance including the pad pin.

The test pin is configured in push-pull output mode and is toggled by software at a fixed

frequency.

On-chip peripheral current consumption

The current consumption of the on-chip peripherals is given in the following table. The MCU

is placed under the following conditions:

•

All I/O pins are in Analog mode

•

The given value is calculated by measuring the difference of the current consumptions:

–

when the peripheral is clocked on

–

when the peripheral is clocked off

•

Ambient operating temperature and supply voltage conditions summarized in Table 18:

Voltage characteristics

•

The power consumption of the digital part of the on-chip peripherals is given in the

following table. The power consumption of the analog part of the peripherals (where

applicable) is indicated in each related section of the datasheet.

ISW

VDDIO1 fSW C

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