STM32L081CB datasheet(62/110 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L081xx

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DocID027513 Rev 4

6.3.5

Wakeup time from low-power mode

The wakeup times given in the following table are measured with the MSI or HSI16 RC

oscillator. The clock source used to wake up the device depends on the current operating

mode:



Sleep mode: the clock source is the clock that was set before entering Sleep mode



Stop mode: the clock source is either the MSI oscillator in the range configured before

entering Stop mode, the HSI16 or HSI16/4.



Standby mode: the clock source is the MSI oscillator running at 2.1 MHz

All timings are derived from tests performed under ambient temperature and VDD supply

voltage conditions summarized in Table 20.

Table 35. Peripheral current consumption in Stop and Standby mode(1)

Symbol

Peripheral

Typical consumption, TA = 25 °C

Unit

VDD=1.8 V

VDD=3.0 V

IDD(PVD / BOR)

-0.7

1.2

µA

IREFINT

1.7

LSE Low drive(2)

0.11

0,13

LSI

0.27

0.31

-IWDG

0.2

0.3

LPTIM1, Input 100 Hz

0.01

0,01

LPTIM1, Input 1 MHz

LPUART1

0,5

RTC

0.16

0,3

1. LPTIM, LPUART peripherals can operate in Stop mode but not in Standby mode.

LSE Low drive consumption is the difference between an external clock on OSC32_IN and a quartz between OSC32_IN

and OSC32_OUT.-

Table 36. Low-power mode wakeup timings

Symbol

Parameter

Conditions

Typ

Max

Unit

tWUSLEEP Wakeup from Sleep mode

fHCLK = 32 MHz

Number

of clock

cycles

tWUSLEEP_

Wakeup from Low-power sleep mode,

fHCLK = 262 kHz

fHCLK = 262 kHz

Flash memory enabled

fHCLK = 262 kHz

Flash memory switched OFF

910

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