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STM32L412RBI6 数据表(PDF) 20 Page - STMicroelectronics |
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STM32L412RBI6 数据表(HTML) 20 Page - STMicroelectronics |
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20 / 192 page  Functional overview STM32L412xx 20/192 DS12469 Rev 4 Note: If these supplies are tied to ground, the I/Os supplied by these power supplies are not 5 V tolerant. Note: VDDIOx is the I/Os general purpose digital functions supply. VDDIOx represents VDDIO1, with VDDIO1 = VDD. Figure 2. Power supply overview During power-up and power-down phases, the following power sequence requirements must be respected: • When VDD is below 1 V, other power supplies (VDDAVDDUSB) must remain below VDD + 300 mV. • When VDD is above 1 V, all power supplies are independent. 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 external decoupling capacitors to be discharged with different time constants during the power-down transient phase. |
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