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STM32WB10CC 数据表(PDF) 21 Page - STMicroelectronics |
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STM32WB10CC 数据表(HTML) 21 Page - STMicroelectronics |
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21 / 110 page  DS13259 Rev 2 21/110 STM32WB10CC Functional overview 43 During power up/down, the following power sequence requirements must be respected: When VDD is below 1 V the other power supply (VDDA), must remain below VDD + 300 mV When VDD is above 1 V all power supplies are independent. Figure 4. Power-up/down sequence 1. VDDX refers to VDDA. During the power down phase, VDD can temporarily become lower than other supplies only if the energy provided to the MCU remains below 1 mJ. This allows the external decoupling capacitors to be discharged with different time constants during the power down transient phase. Note: VDD and VDDRF must be wired together, so they can follow the same voltage sequence. MSv47490V1 0.3 1 VBOR0 3.6 Operating mode Power-on Power-down time V VDDX (1) VDD Invalid supply area VDDX < VDD + 300 mV VDDX independent from VDD |
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