STM32F373C8 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STM32F373C8

ARM Cortex-M4 32b MCU+FPU, up to 256KB Flash+32KB SRAM timers, 4 ADCs (12/16-bit), 3 DACs, 2 comp., 2.0-3.6 V operation

STMicroelectronics 

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STM32F373xx

Electrical characteristics

Figure 12. High-speed external clock source AC timing diagram

9+6(+

9+6(/





WU+6(

WZ+6(+

WI+6(

7+6(

WZ+6(/

W

069

Low-speed external user clock generated from an external source

In bypass mode the LSE 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 13.

Symbol

Table 39. Low-speed external user clock characteristics

Parameter(1)

Conditions

Min

Typ

Max Unit

fLSE_ext

User External clock source

frequency

VLSEH

OSC32_IN input pin high level

voltage

VLSEL

OSC32_IN input pin low level

voltage

tw(LSEH)

tw(LSEL)

tr(LSE)

tf(LSE)

OSC32_IN high or low time

OSC32_IN rise or fall time

1. Guaranteed by design.

-

-

32.768 1000 kHz

-

0.7VDD

-

VDD

V

-

VSS

-

0.3VDD

-

450

-

-

ns

-

-

-

50

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