CYUSB3KIT-003 EZ-USB FX3 using an USB storage device on J1: how to supply power ?

[siz]

Hello,

Today has arrived my CYUSB3KIT-003 EZ-USB FX3 SuperSpeed Explorer Kit and I need to interface to an FPGA.

The basic idea of the connection is the following:

FPGA => CYUSB3KIT-003 through GPIF II => USB (2.0 or 3.0) storage device.

Then I read into the UG (https://www.cypress.com/file/133836/download 😞

"The SuperSpeed Explorer Kit development board is powered from the USB 3.0 connector J1. This development board does not support self-powered mode, although the FX3 device does support it."

So what is the correct way to supply power to the board in case of using a USB storage device connected to J1 ? Isn't it possible to work this way ?

Thanks.

Regards,

simozz

[siz]

Looking better at the AN70707 (https://www.cypress.com/file/139936/download ) and from schematics (https://www.cypress.com/file/133841/download ) the best way is to power it from USB.

AN65974 also specify that the card can be connected to a USB Host device but not to an USB device.

s.

[YashwantK_46 · Accepted solution]

Hi Simozz,

The best way to power CYUSB3014 is via USB as there is no provision for self-power mode on the EZ-USB FX3 SuperSpeed Explorer Kit.

You will have to make your custom board with the self-power mode enabled to be able to configure FX3 as a USB Host.

You can refer to the following schematics for the FX3 DVK board and make your own custom board: https://www.cypress.com/file/126101/download

The above .zip file has the kit schematic files and you can follow it to make a board which is capable of working on self-power and then implement your application.

Regards,
Yashwant