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STM32F401CD 数据表(PDF) 57 Page - STMicroelectronics |
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STM32F401CD 数据表(HTML) 57 Page - STMicroelectronics |
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57 / 135 page  DocID025644 Rev 3 57/135 STM32F401xD STM32F401xE Electrical characteristics 114 6.1.6 Power supply scheme Figure 18. Power supply scheme 1. To connect PDR_ON pin, refer to Section 3.14: Power supply supervisor. 2. The 4.7 µF ceramic capacitor must be connected to one of the VDD pin. 3. VCAP_2 pad is only available on LQFP100 and UFBGA100 packages. 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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