STM32F030K8T6TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STM32F030K8T6TR

Value-line ARM®-based 32-bit MCU with up to 256-KB Flash, timers, ADC, communication interfaces, 2.4-3.6 V operation

STMicroelectronics 

Electrical characteristics

STM32F030x4/x6/x8/xC

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 15.

Symbol

Table 32. Low-speed external user clock characteristics

Parameter(1)

Min

Typ

Max

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)

OSC32_IN high or low time

tr(LSE)

tf(LSE)

OSC32_IN rise or fall time

1. Guaranteed by design, not tested in production.

-

0.7 VDDIOx

VSS

450

-

32.768

-

-

-

-

1000

VDDIOx

0.3 VDDIOx

-

50

Unit

kHz

V

ns

Figure 15. Low-speed external clock source AC timing diagram

WZ/6(+

9/6(+





9/6(/

WU/6(

WI/6(

WZ/6(/

W

7/6(

069

High-speed external clock generated from a crystal/ceramic resonator

The high-speed external (HSE) clock can be supplied with a 4 to 32 MHz crystal/ceramic

resonator oscillator. All the information given in this paragraph are based on design

simulation results obtained with typical external components specified in Table 33. In the

application, the resonator and the load capacitors have to be placed as close as possible to

the oscillator pins in order to minimize output distortion and startup stabilization time. Refer

to the crystal resonator manufacturer for more details on the resonator characteristics

(frequency, package, accuracy).

Symbol

Table 33. HSE oscillator characteristics

Parameter

Conditions(1)

Min(2) Typ Max(2) Unit

fOSC_IN Oscillator frequency

RF Feedback resistor

-

4

8

32 MHz

-

- 200 -

kΩ

52/91

DocID024849 Rev 3

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