STM32F030RCT6 データシートの表示（PDF） - STMicroelectronics

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STM32F030RCT6

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

Note:

obtained with typical external components specified in Table 34. 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 34. LSE oscillator characteristics (fLSE = 32.768 kHz)

Parameter

Conditions(1)

Min(2) Typ Max(2) Unit

low drive capability

-

0.5 0.9

IDD

LSE current

consumption

medium-low drive capability

-

medium-high drive capability

-

-

1

µA

-

1.3

high drive capability

low drive capability

-

-

1.6

5

-

-

gm

Oscillator

transconductance

medium-low drive capability

8

-

medium-high drive capability 15

-

-

µA/V

-

high drive capability

25

-

-

tSU(LSE)(3) Startup time

VDDIOx is stabilized

-

2

-

s

1. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator

design guide for ST microcontrollers”.

2. Guaranteed by design, not tested in production.

3. tSU(LSE) is the startup time measured from the moment it is enabled (by software) to a stabilized

32.768 kHz oscillation is reached. This value is measured for a standard crystal and it can vary significantly

with the crystal manufacturer

For information on selecting the crystal, refer to the application note AN2867 “Oscillator

design guide for ST microcontrollers” available from the ST website www.st.com.

Figure 17. Typical application with a 32.768 kHz crystal

Note:

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An external resistor is not required between OSC32_IN and OSC32_OUT and it is forbidden

to add one.

54/91

DocID024849 Rev 3

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