STM32MP151AAB3 datasheet(143/253 Pages) STMICROELECTRONICS

部件名	STM32MP151AAB3

功能描述	Arm® Cortex®-A7 800 MHz Cortex®-M4 MPU, TFT, 35 comm. interfaces, 25 timers, adv. analog

PDF	253 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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143 / 253 page

DS12500 Rev 3

143/253

STM32MP151A/D

Electrical characteristics

232

6.3.8

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 I/O.

Digital and analog bypass modes are available.

The external clock signal has to respect the Table 50: I/O static characteristics. However,

the recommended clock input waveform is shown in Figure 15 for digital bypass mode and

in Figure 16 for analog bypass mode. In analog bypass mode the clock can be a sinusoidal

waveform.

Figure 15. High-speed external clock source AC timing diagram (digital bypass)

2. Including the tSEL_VDDCORETEMPO = 234 μs.

Table 28. High-speed external user clock characteristics

(digital bypass)(1)

1. Guaranteed by design.

Symbol

Parameter

Min

Typ

Max

Unit

fHSE_ext

User external clock source frequency

MHz

VSW (VHSEH -VHSEL) OSC_IN amplitude

0.7×VDD

-VDD

VDC

OSC_IN input voltage

VSS

-0.3×VSS

tW(HSE)

OSC_IN high or low time

ai17528b

OSC_IN

External

STM32

clock source

VHSEH

tf(HSE)

tW(HSE)

90 %

10 %

THSE

tr(HSE)

tW(HSE)

fHSE_ext

VHSEL

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