STM32L151X8 datasheet(69/133 Pages) STMICROELECTRONICS

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STM32L151x6/8/B STM32L152x6/8/B

Electrical characteristics

104

6.3.5

Wakeup time from Low power mode

The wakeup times given in the following table are measured with the MSI 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 the MSI oscillator in the range configured before

entering Stop mode

•

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 13.

Table 25. Low-power mode wakeup timings

Symbol

Parameter

Conditions

Typ Max(1)

1. Guaranteed by characterization results, unless otherwise specified

Unit

tWUSLEEP

Wakeup from Sleep mode

fHCLK = 32 MHz

0.36

µs

tWUSLEEP_LP

Wakeup from Low power

sleep mode

fHCLK = 262 kHz

Flash enabled

fHCLK = 262 kHz

Flash switched OFF

tWUSTOP

Wakeup from Stop mode,

regulator in Run mode

fHCLK = fMSI = 4.2 MHz

8.2

Wakeup from Stop mode,

regulator in low power

mode

fHCLK = fMSI = 4.2 MHz

Voltage Range 1 and 2

8.2

9.3

fHCLK = fMSI = 4.2 MHz

Voltage Range 3

7.8

11.2

fHCLK = fMSI = 2.1 MHz

fHCLK = fMSI = 1.05 MHz 15.5

fHCLK = fMSI = 524 kHz

fHCLK = fMSI = 262 kHz

fHCLK = fMSI = 131 kHz

105

118

fHCLK = MSI = 65 kHz

210

237

tWUSTDBY

Wakeup from Standby

mode

FWU bit = 1

fHCLK = MSI = 2.1 MHz

103

Wakeup from Standby

mode

FWU bit = 0

fHCLK = MSI = 2.1 MHz

2.5

3.2

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