STM32F302CCT6TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F302CCT6TR

ARM Cortex-M4F 32b MCU+FPU, up to 256KB Flash+48KB SRAM 4 ADCs, 2 DAC ch., 7 comp, 4 PGA, timers, 2.0-3.6 V operation

STMicroelectronics 

Electrical characteristics

STM32F302xx/STM32F303xx

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 38. High-speed external user clock characteristics

Symbol

Parameter

Conditions Min Typ Max Unit

fHSE_ext

User external clock source

frequency(1)

VHSEH OSC_IN input pin high level voltage

VHSEL OSC_IN input pin low level voltage

tw(HSEH)

tw(HSEL)

OSC_IN high or low time(1)

tr(HSE)

tf(HSE)

OSC_IN rise or fall time(1)

1. Guaranteed by design, not tested in production.

1

8

32 MHz

0.7VDD -

VDD

V

VSS

- 0.3VDD

15

-

-

ns

-

-

20

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

6(3%(

6(3%,





TR(3%

T7(3%(

TF(3%

4(3%

T7(3%,

T

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Doc ID 023353 Rev 5

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