STM32H747AI datasheet(138/252 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32H747xI/G

128/242

DS12930 Rev 1

6.3.8

Wakeup time from low-power modes

The wakeup times given in Table 49 are measured starting from the wakeup event trigger up

to the first instruction executed by the CPU:

•

For Stop or Sleep modes: the wakeup event is WFE.

•

WKUP (PC1) pin is used to wakeup from Standby, Stop and Sleep modes.

All timings are derived from tests performed under ambient temperature and VDD=3.3 V.

Table 49. Low-power mode wakeup timings(1)

Symbol

Parameter

Conditions

Typ(2)

Max(2)

Unit

tWUSLEEP(3)

Wakeup from Sleep

CPU

clock

cycles

tWUSTOP(3)

Wakeup from Stop

VOS3, HSI, Flash memory in normal mode

4.4

5.6

µs

VOS3, HSI, Flash memory in low-power

mode

VOS4, HSI, Flash memory in normal mode

VOS4, HSI, Flash memory in low-power

mode

VOS5, HSI, Flash memory in normal mode

VOS5, HSI, Flash memory in low-power

mode

VOS3, CSI, Flash memory in normal mode

VOS3, CSI, Flash memory in low power

mode

VOS4, CSI, Flash memory in normal mode

VOS4, CSI, Flash memory in low-power

mode

VOS5, CSI, Flash memory in normal mode

VOS5, CSI, Flash memory in low-power

mode

tWUSTOP_

KERON

(3)

Wakeup from Stop,

clock kept running

VOS3, HSI, Flash memory in normal mode

2.6

3.4

VOS3, CSI, Flash memory in normal mode

tWUSTDBY(3)

Wakeup from Standby

mode

390

500

1. The wakeup timings is valid for both CPUs.

2. Guaranteed by characterization results.

3. The wakeup times are measured from the wakeup event to the point in which the application code reads the first instruction.

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