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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32WB55 датащи(PDF) 28 Page - STMicroelectronics |
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STM32WB55 датащи(HTML) 28 Page - STMicroelectronics |
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28 / 193 page  Functional overview STM32WB55xx STM32WB35xx 28/193 DS11929 Rev 11 During power up/down, the following power sequence requirements must be respected: When VDD is below 1 V the other power supplies (VDDA, VDDUSB, VLCD), must remain below VDD + 300 mV When VDD is above 1 V all power supplies are independent. Figure 6. Power-up/down sequence 1. VDDX refers to any power supply among VDDA, VDDUSB and VLCD. 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, VDDRF and VDDSMPS 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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