STM32F100RBH7B Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

STM32F100RBH7B

Low & medium-density value line, advanced ARM®-based 32-bit MCU with 16 to 128 KB Flash, 12 timers, ADC, DAC & 8 comm interfaces

STMicroelectronics 

Electrical characteristics

STM32F100x4, STM32F100x6, STM32F100x8, STM32F100xB

Table 21. HSE 4-24 MHz oscillator characteristics(1)(2)

Symbol

Parameter

Conditions

Min Typ

fOSC_IN Oscillator frequency

-

4

8

RF Feedback resistor

-

- 200

CL1

CL2(3)

Recommended load capacitance

versus equivalent serial

resistance of the crystal (RS)(4)

RS = 30 Ω

-

30

i2

HSE driving current

VDD = 3.3 V

VIN = VSS with 30 pF

-

-

load

gm

tSU((5H)SE)

Oscillator transconductance

Startup time

Startup

VDD is stabilized

25

-

-

2

Max Unit

24 MHz

-

kΩ

-

pF

1 mA

- mA/V

-

ms

1. Resonator characteristics given by the crystal/ceramic resonator manufacturer.

2. Guaranteed by characterization results.

3. It is recommended to use high-quality external ceramic capacitors in the 5 pF to 25 pF range (typ.),

designed for high-frequency applications, and selected to match the requirements of the crystal or

icrneacsplouandcaeittadonr(.c1Ce0Lwp1FhaiccnhadniCsbLteh2,euassreeedruieasssuacalolrymotubhgienhasetaiosmtniemosaf itCzeeLo.1fTathhneed

crystal manufacturer typically specifies a load

cCoLm2.bPinCeBd

and MCU pin capacitance must be

pin and board capacitance) when sizing

CL1 and CL2.

4. The relatively low value of the RF resistor offers a good protection against issues resulting from use in a

humid environment, due to the induced leakage and the bias condition change. However, it is

recommended to take this point into account if the MCU is used in tough humidity conditions.

5.

toSsUc(iHllaSEtio) nis

the startup

is reached.

time

This

measured from the moment it is enabled

value is measured for a standard crystal

(by software) to

resonator and it

a stabilized 8 MHz

can vary significantly

with the crystal manufacturer

Figure 20. Typical application with an 8 MHz crystal

Resonator with

integrated capacitors

CL1

CL2

8 MH z

resonator

REXT(1)

OSC_IN

RF

OSC_OU T

Bias

controlled

gain

fHS E

STM32F10xxx

1. REXT value depends on the crystal characteristics.

ai14128b

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DocID16455 Rev 9

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