Datasheet

DS10668 Rev 6 65/126
STM32L031x4/6 Electrical characteristics
96
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 V
DD
or V
SS
(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, V
DD
= 3.0 V, T
A
= 25 °C
Unit
Range 1,
V
CORE
=1.8 V
VOS[1:0] = 01
Range 2,
V
CORE
=1.5 V
VOS[1:0] = 10
Range 3,
V
CORE
=1.2 V
VOS[1:0] = 11
Low-power
sleep and run
APB1
WWDG3222
µA/MHz (f
HCLK
)
LPUART1 8 6.5 5.5 6
I2C1 11 9.5 7.5 9
LPTIM1 10 8.5 6.5 8
TIM2 10.5 8.5 7 9
USART2 14.5 12 9.5 11
APB2
ADC1
(2)
5.553.54
µA/MHz (f
HCLK
)
SPI1 4 3 3 2.5
TIM21 7.5 6 5 5.5
TIM227656
DBGMCU 1.5 1 1 0.5
SYSCFG 2.5 2 2 1.5
Cortex-
M0+ core
I/O port
GPIOA 3.5 3 2.5 2.5
µA/MHz (f
HCLK
)
GPIOB 3.5 2.5 2 2.5
GPIOC 8.5 6.5 5.5 7
GPIOH 1.5 1 1 0.5
AHB
CRC 1.5 1 1 1
µA/MHz (f
HCLK
)
FLASH 0
(3)
0
(3)
0
(3)
0
(3)
DMA1 10 8 6.5 8.5
All enabled 101 83 66 85
PWR 2.5 2 2 1 µA/MHz (f
HCLK
)
1. Data based on differential I
DD
measurement between all peripherals off an one peripheral with clock enabled, in the following
conditions: f
HCLK
= 32 MHz (range 1), f
HCLK
= 16 MHz (range 2), f
HCLK
= 4 MHz (range 3), f
HCLK
= 64kHz (Low-power
run/sleep), f
APB1
= f
HCLK
, f
APB2
= f
HCLK
, 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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