STM32F031G6T7(2015) Просмотр технического описания (PDF) - STMicroelectronics

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производитель

STM32F031G6T7
(Rev.:2015)

ARM®-based 32-bit MCU with up to 32 Kbyte Flash, 9 timers, ADC and communication interfaces, 2.0 - 3.6 V

STMicroelectronics 

STM32F031x4 STM32F031x6

Electrical characteristics

Symbol

Table 34. LSE oscillator characteristics (fLSE = 32.768 kHz)

Parameter

Conditions(1)

Min(2) Typ Max(2) Unit

LSEDRV[1:0]=00

lower driving capability

5

-

-

gm

Oscillator

transconductance

LSEDRV[1:0]= 01

medium low driving capability

LSEDRV[1:0] = 10

medium high driving capability

8

-

15

-

-

µA/V

-

LSEDRV[1:0]=11

higher driving 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.

rteSaUc(LhSeEd).

is the startup

This value is

time measured

measured for a

from the moment it is enabled (by software)

standard crystal and it can vary significantly

to a stabilized 32.768 kHz oscillation

with the crystal manufacturer

is

Note:

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

5HVRQDWRUZLWKLQWHJUDWHG

FDSDFLWRUV

&/

26&B,1

I/6(

N+]

UHVRQDWRU

'ULYH

SURJUDPPDEOH

DPSOLILHU

26&B287

&/

Note:

6.3.8

069

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

to add one.

Internal clock source characteristics

The parameters given in Table 35 are derived from tests performed under ambient

temperature and supply voltage conditions summarized in Table 18: General operating

conditions. The provided curves are characterization results, not tested in production.

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