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USB hardware design Query

Question asked by Amreen Sayyed on Jun 16, 2014
Latest reply on Jul 3, 2014 by Dragos GALALAE

Hello,

 

I am working with KL25Z64VFM4 controller for USB as a CDC device.

I have attached snap shot of USB schematic.

I have given external 3.3V from J4 connector as in the schematic.

And connected USB for testing as a CDC device.

It was working very well.

But when i am testing again i got the message from USB port that "Device is consuming more current".

After that i got that USB_5V and ground signal are short.

 

1) Is the attached schematic is OK for USB or do i need to make any changes in it?

2) Can I connect multilink for debugging when i am giving external 3.3V and USB is also connected?

 

 

Regards,

Amreen

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