5 Replies Latest reply on Feb 12, 2020 7:51 PM by YiZ_31

    CYUSB3014 boot issue

    LiZh_4600321

      hello,

              I used CYUSB3014 in my design, but  it fails to boot from USB. When debugging, I found that the voltage of the DP pin is not pulled up to 3.3V, but about 0.6V? The crystal oscillator does not vibrate when it is powered on, but it starts to vibrate after the chip reset. I used both VBUS and VBATT to power the USB module. The VBATT voltage is 5V. Is there any problem with this design?

              This question has troubled me for a long time, looking forward to any reply!

       

      您好,

             我的设计中使用了CYUSB3014,但现在它无法从USB引导启动。调试时,发现DP管脚的电压没有拉高到3.3V,而是0.6V左右?晶振上电时不起振,但在芯片复位后起振,我同时使用了VBUS和VBATT给USB模块供电,VBATT电压为5V,这样设计有没有问题?

              这个问题困扰了我很久,期待任何回复!