STM32F302VCT7TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F302VCT7TR

ARM®-based Cortex®-M4 32b MCU+FPU, up to 256KB Flash+ 40KB SRAM, 2 ADCs, 1 DAC ch., 4 comp, 2 PGA, timers, 2.0-3.6 V

STMicroelectronics 

STM32F302xB STM32F302xC

Electrical characteristics

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

The low-speed external (LSE) clock can be supplied with a 32.768 kHz 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 43. 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 43. LSE oscillator characteristics (fLSE = 32.768 kHz)

Parameter

Conditions(1)

Min(2) Typ Max(2) Unit

LSEDRV[1:0]=00

lower driving capability

-

0.5 0.9

IDD

LSE current consumption

LSEDRV[1:0]=10

medium low driving capability

-

LSEDRV[1:0]=01

medium high driving capability

-

-

1

µA

-

1.3

LSEDRV[1:0]=11

higher driving capability

-

-

1.6

LSEDRV[1:0]=00

lower driving capability

5

-

-

gm

Oscillator

transconductance

LSEDRV[1:0]=10

medium low driving capability

8

-

LSEDRV[1:0]=01

medium high driving capability

15

-

-

µA/V

-

LSEDRV[1:0]=11

higher driving capability

25

-

-

tSU(LSE)(3) Startup time

VDD 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.

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.

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