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Re: VDD33USB on STM32H743
2024-07-26
USB收发器独立电源供应有以下几种方式，具体取决于VDD33USB和VDD50USB的可用性： 1. 当VDD50USB引脚可用时，可以使用该引脚为USB收发器提供内部稳压器的电源。在这种情况下，VDD50USB引脚应接收4.0至5.5 V之间的电压，通常来自USB连接器的VBUS线。经稳压后的电源（3.0至3.6 V）将在VDD33USB上提供。在这种配置中，VDD50USB电压必须满足以下条件：必须连接一个外部电容器到VDD33USB。注意：请参考产品数据手册了解VDD条件。 2. 当VDD...
