STM32L4S5AI datasheet(156/275 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L4S5xx, STM32L4S7xx and STM32L4S9xx

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DocID030322 Rev 2

tWUSTBY

Wakeup time

from Standby

mode to Run

mode

Range 1

Wakeup clock MSI = 8 MHz

30.7

47.8

µs

Wakeup clock MSI = 4 MHz

40.4

55.6

tWUSTBY

SRAM2

Wakeup time

from Standby

with SRAM2 to

Run mode

Range 1

Wakeup clock MSI = 8 MHz

32.1

49.1

Wakeup clock MSI = 4 MHz

41.5

55.5

tWUSHDN

Wakeup time

from

Shutdown

mode to Run

mode

Range 1

Wakeup clock MSI = 4 MHz

265.0 339.4

1. Guaranteed by characterization results.

Table 45. Regulator modes transition times(1)

1. Guaranteed by characterization results.

Symbol

Parameter

Conditions

Typ

Max

Unit

tWULPRUN

Wakeup time from Low- power run

mode to Run mode(2)

2. Time until REGLPF flag is cleared in PWR_SR2.

Code run with MSI 2 MHz

μs

tVOST

Regulator transition time from

Range 2 to Range 1 or

Range 1 to Range 2(3)

3. Time until VOSF flag is cleared in PWR_SR2.

Code run with MSI 24 MHz

Table 46. Wakeup time using USART/LPUART(1)

1. Guaranteed by characterization results.

Symbol

Parameter

Conditions

Typ

Max

Unit

tWUUSART

tWULPUART

Wakeup time needed to calculate

the maximum USART/LPUART

baudrate allowing to wakeup up

from stop mode when

USART/LPUART clock source is

HSI

Stop mode 0

1.7

μs

Stop mode 1/2

8.5

Table 44. Low-power mode wakeup timings(1) (continued)

Symbol

Parameter

Conditions

Typ

Max

Unit

STM32L4S5AI Datasheet(PDF) 156 Page - STMicroelectronics

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