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AN1709 데이터시트(PDF) 29 Page - STMicroelectronics

부품명 AN1709
상세설명  EMC DESIGN GUIDE FOR ST MICROCONTROLLERS
PDF  38 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1709 데이터시트(HTML) 29 Page - STMicroelectronics

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EMC DESIGN GUIDE FOR ST MICROCONTROLLERS
3.2.2.2 Internal Voltage Regulators (for MCUs with low power core).
An internal Voltage Regulator is used to power some ST Microcontrollers Cores starting from
the external power supply.
The Voltage Regulator reduces EMI due to the MCU Core with 2 effects:
– Lower CPU Supply Voltage
– Isolate CPU Supply from external MCU supplies.
3.2.3 Output I/O Current limitation & edge timing control
Output buffers are embedded in ST Microcontrollers, their switching speed is controlled in
order to avoid parasitic oscillations when they are switched. The MCU design makes a trade-
off between noise and speed.



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