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STM32F429NET6TR 数据表(PDF) 90 Page - STMicroelectronics |
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STM32F429NET6TR 数据表(HTML) 90 Page - STMicroelectronics |
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90 / 231 page  Electrical characteristics STM32F427xx STM32F429xx 90/231 DocID024030 Rev 6 6.1.6 Power supply scheme Figure 22. Power supply scheme 1. To connect BYPASS_REG and PDR_ON pins, refer to Section 3.17: Power supply supervisor and Section 3.18: Voltage regulator 2. The two 2.2 µF ceramic capacitors should be replaced by two 100 nF decoupling capacitors when the voltage regulator is OFF. 3. The 4.7 µF ceramic capacitor must be connected to one of the VDD pin. 4. VDDA=VDD and VSSA=VSS. Caution: Each power supply pair (VDD/VSS, VDDA/VSSA ...) must be decoupled with filtering ceramic capacitors as shown above. These capacitors must be placed as close as possible to, or below, the appropriate pins on the underside of the PCB to ensure good operation of the device. It is not recommended to remove filtering capacitors to reduce PCB size or cost. This might cause incorrect operation of the device. |
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