4 Replies Latest reply on Jan 14, 2020 7:19 PM by LiZh_4600321

    CYUSB3014 unable to  be detected by PC

    LiZh_4600321

      hello,

      I used CYUSB3014 in my design and referenced the design of a third-party development board. After connecting to the PC with a cable, the device manager of the PC cannot find the device, and the measured voltage and crystal clock output are normal, but compared with the development board, it is found that when the PC is not connected, the DP pin of the development board is high ( 3.3V), and the discipline on my board is about 0.6V. What could be the cause of this problem?

       

      Attachment here is the schematic (the clock uses X2, Y2 is not soldered).

       

      我在设计中使用了CYUSB3014,参考了第三方的开发板设计。用线缆连接到PC后,PC的设备管理器无法发现设备,测量电压和晶振时钟输出都正常,但与开发板对比发现,在未连接PC时,开发板的DP管脚为高电平(3.3V),而我的板子上该管教是0.6V左右,产生该问题的原因可能是什么?

      附件是我设计的原理图(时钟采用了X2,Y2未焊接)。