你好,
C5517我们不接USB,不带RTC。现在选择使用外部晶体是否只需要保证USBVDD_OSC这部分线路接通,CLKIN,CLK_SEL配置正确就ok了?USB_VDDA3P3是否直接地?谢谢!
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你好,
C5517我们不接USB,不带RTC。现在选择使用外部晶体是否只需要保证USBVDD_OSC这部分线路接通,CLKIN,CLK_SEL配置正确就ok了?USB_VDDA3P3是否直接地?谢谢!
1. 是USB_VDDOSC管脚吧?不用的话,接地VSS就好了。在数据手册管脚描述里有说明。
When the USB peripheral is not used, USB_VDDOSC should be connected to ground(VSS).
2. USB_VDDA3P3接地就好了,在数据手册管脚描述里有说明。
When the USB peripheral is not used, the USB_VDDA3P3 signal should be connected to ground (VSS).