STM32F205RB datasheet(88/178 Pages) STMICROELECTRONICS

Il numero della parte	STM32F205RB

Spiegazioni elettronici	ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/1284KB RAM

PDF	178 Pages

Scroll/Zoom	100%

Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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88 / 178 page

Electrical characteristics

STM32F20xxx

88/178

DocID15818 Rev 11

Figure 30. High-speed external clock source AC timing diagram

Figure 31. Low-speed external clock source AC timing diagram

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

The high-speed external (HSE) clock can be supplied with a 4 to 26 MHz crystal/ceramic

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

characterization results obtained with typical external components specified in Table 30. 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).

ai17528

OSC_IN

External

STM32F

clock source

VHSEH

tf(HSE)

tW(HSE)

90 %

10 %

THSE

tr(HSE)

tW(HSE)

fHSE_ext

VHSEL

ai17529

OSC32_IN

External

STM32F

clock source

VLSEH

tf(LSE)

tW(LSE)

90%

10 %

TLSE

tr(LSE)

tW(LSE)

fLSE_ext

VLSEL

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