BOOTMODE[1:0] = 01
USB_OTG1_ID 上拉到3.3V
通过USB线接PC后，没有任何设备出现，
UART1_TX测试，发现电压为0V
考虑到有源晶振更可靠，所以在设计中使用了24MHz有源晶振， 晶振供电电压3.3V，
现在测试NVCC_PLL_OUT电压为1.65V
VDD_USB_CAP测得电压为2.55V， 其它组电压都正常。
Hi,
The connections of OSC is not correct on schematic, Input pin of CPU is XTALO, not XTALI, and voltage should be 1.1~1.2V. see below, please!
So your process doesn't work.
Have a nice day!
TIC weidong sun
