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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F469AE датащи(PDF) 29 Page - STMicroelectronics |
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STM32F469AE датащи(HTML) 29 Page - STMicroelectronics |
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29 / 220 page  DS11189 Rev 7 29/220 STM32F469xx Functional overview 47 The following conditions must be respected: – During power-on phase (VDD < VDD_MIN), VDDUSB should be always lower than VDD – During power-down phase (VDD < VDD_MIN), VDDUSB should be always lower than VDD –VDDUSB rising and falling time rate specifications must be respected. – In operating mode phase, VDDUSB could be lower or higher than VDD: – If USB (USB OTG_HS/OTG_FS) is used, the associated GPIOs powered by VDDUSB are operating between VDDUSB_MIN and VDDUSB_MAX.The VDDUSB supplies both USB transceivers (USB OTG_HS and USB OTG_FS). – If only one USB transceiver is used in the application, the GPIOs associated to the other USB transceiver are still supplied by VDDUSB. – If USB (USB OTG_HS/OTG_FS) is not used, the associated GPIOs powered by VDDUSB are operating between VDD_MIN and VDD_MAX. – If USB (USB OTG_HS/OTG_FS) is not used and the associated GPIOs powered by VDDUSB are not used, then VDDUSB should be tied to VSS or VDD (VDDUSB must not be floating). Figure 7. VDDUSB connected to an external independent power supply The DSI (Display Serial Interface) sub-system uses several power supply pins that are independent from the other supply pins: VDDDSI is an independent DSI power supply dedicated for DSI Regulator and MIPI D-PHY. This supply must be connected to global VDD. VCAPDSI pin is the output of DSI Regulator (1.2 V), which must be connected externally to VDD12DSI. VDD12DSI pin is used to supply the MIPI D-PHY, and to supply clock and data lanes pins. An external capacitor of 2.2 µF must be connected on VDD12DSI pin. VSSDSI pin is an isolated supply ground used for DSI sub-system. If DSI functionality is not used at all, then: – VDDDSI pin must be connected to global VDD. MS37590V1 V DDUSB_MIN V DD_MIN time V DDUSB_MAX USB functional area V DD =VDDA USB non functional area V DDUSB Power-on Power-down Operating mode USB non functional area |
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