STM32F301X8(2014) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STM32F301X8
(Rev.:2014)

ARM® Cortex®-M4 32-bit MCU+FPU, up to 64 KB Flash, 16 KB SRAM, ADC, DAC, COMP, Op-Amp, 2.0 – 3.6 V

STMicroelectronics 

Electrical characteristics

STM32F301x6 STM32F301x8

6.3.7

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 has to respect the I/O characteristics in Section 6.3.14. However, the

recommended clock input waveform is shown in Figure 14.

Table 39. High-speed external user clock characteristics

Symbol

Parameter

Conditions Min Typ Max Unit

fHSE_ext

User external clock source

frequency(1)

1

8

32 MHz

VHSEH OSC_IN input pin high level voltage

0.7VDD -

VDD

V

VHSEL OSC_IN input pin low level voltage

-

VSS

- 0.3VDD

tw(HSEH)

tw(HSEL)

tr(HSE)

tf(HSE)

OSC_IN high or low time(1)

OSC_IN rise or fall time(1)

15

-

-

ns

-

-

20

1. Guaranteed by design, not tested in production.

Figure 14. High-speed external clock source AC timing diagram

9+6(+

9+6(/





WU+6(

WZ+6(+

WI+6(

7+6(

WZ+6(/

W

069

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