STM32H523VCU6 datasheet(114/228 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32H523xx

114/228

DS14540 Rev 1

5.3.7

External clock source characteristics

High-speed external user clock generated from an external source

In bypass mode the HSE oscillator is switched off and the input pin is a standard GPIO.

The external clock signal must respect the Table 38 in addition to Table 56. The external

clock can be low-swing (analog) or digital. In case of a low-swing analog input clock, the

clock squarer must be activated (refer to RM0481).

tWUSTOP

Wake-up time from

Stop mode

SVOS3, HSI 64 MHz, flash memory in normal mode

4.0

4.8

µs

SVOS3, HSI 64 MHz, flash memory in low-power mode

7.9

11.5

SVOS4, HSI 64 MHz, flash memory in normal mode

13.8

16.0

SVOS4, HSI 64 MHz, flash memory in low-power mode

17.7

21.9

SVOS5, HSI 64 MHz, flash memory in low-power mode

31.4

36.8

SVOS3, CSI 4 MHz, flash memory in normal mode

25.5

31.0

SVOS3, CSI 4 MHz, flash memory in low power mode

27.7

34.2

SVOS4, CSI 4 MHz, flash memory in normal mode

35.3

40.8

SVOS4, CSI 4 MHz, flash memory in low-power mode

37.5

44.0

SVOS5, CSI 4 MHz, flash memory in low-power mode

51.2

58.9

tWUSTBY

Wake-up time from

Standby mode

VCAP capacitors discharged

506.0 653.6

1. Evaluated by characterization - Not tested in production.

Table 37. Low-power mode wake-up timings(1) (continued)

Symbol

Parameter

Conditions

Typ

Max

Unit

Table 38. High-speed external user clock characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSE_ext

User external clock

source frequency

External digital/analog

clock

425

MHz

VHSEH

Digital OSC_IN input

high-level voltage

External digital clock

0.7 VDD

-VDD

VHSEL

Digital OSC_IN input

low-level voltage

VSS

0.3 VDD

tw(HSEH)/tw(HSEL) (2)

Digital OSC_IN input

high or low time

External digital clock

STM32H523VCU6 Datasheet(PDF) 114 Page - STMicroelectronics

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