STM32L031X4 datasheet(65/126 Pages) STMICROELECTRONICS

65 / 126 page

DS10668 Rev 6

65/126

STM32L031x4/6

Electrical characteristics

On-chip peripheral current consumption

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

MCU is placed under the following conditions:

•

all I/O pins are in input mode with a static value at VDD or VSS (no load)

•

all peripherals are disabled unless otherwise mentioned

•

the given value is calculated by measuring the current consumption

–

with all peripherals clocked off

–

with only one peripheral clocked on

Table 34. Peripheral current consumption in Run or Sleep mode(1)

Peripheral

Typical consumption, VDD = 3.0 V, TA = 25 °C

Unit

Range 1,

VCORE=1.8 V

VOS[1:0] = 01

Range 2,

VCORE=1.5 V

VOS[1:0] = 10

Range 3,

VCORE=1.2 V

VOS[1:0] = 11

Low-power

sleep and run

APB1

WWDG

322

µA/MHz (fHCLK)

LPUART1

6.5

5.5

I2C1

9.5

7.5

LPTIM1

8.5

6.5

TIM2

10.5

8.5

USART2

14.5

9.5

APB2

ADC1(2)

5.553.5

µA/MHz (fHCLK)

SPI1

2.5

TIM21

7.5

5.5

TIM22

765

DBGMCU

1.5

0.5

SYSCFG

2.5

1.5

Cortex-

M0+ core

I/O port

GPIOA

3.5

2.5

µA/MHz (fHCLK)

GPIOB

3.5

2.5

GPIOC

8.5

6.5

5.5

GPIOH

1.5

0.5

AHB

CRC

1.5

µA/MHz (fHCLK)

FLASH

0(3)

DMA1

6.5

8.5

All enabled

101

PWR

2.5

µA/MHz (fHCLK)

1. Data based on differential IDD measurement between all peripherals off an one peripheral with clock enabled, in the following

conditions: fHCLK = 32 MHz (range 1), fHCLK = 16 MHz (range 2), fHCLK = 4 MHz (range 3), fHCLK = 64kHz (Low-power

run/sleep), fAPB1 = fHCLK, fAPB2 = fHCLK, default prescaler value for each peripheral. The CPU is in Sleep mode in both cases.

No I/O pins toggling. Not tested in production.

2. HSI oscillator is off for this measure.

3. Current consumption is negligible and close to 0 µA.

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