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常见问答
NuMicro® NUC442/472系列中的CAN1的TXD引脚,为什么无法正常输出高电平(High)的电压值? 日期:2016-11-29
NUC442/472系列中的CAN1的TXD 引脚,是与GPIO PA.1共用引脚。因为PA.1的供电电源是来自VBAT 引脚,与其它GPIO 引脚的供电电源来自VDD不同,所以需要另外提供一个固定的电源给VBAT 引脚。
因此VBAT 引脚不能是浮空(floating)的状态,否则CAN1的TXD是无法正常输出为High的电压值。
下图为NUC442/472系列的电源架构图。
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应用: | |
功能: | Peripherals,Connectivity,CAN |