1)Are you using FX3 or FX3S? If it is FX3S can you please program your board with the following example projects and check if the device is getting enumerated?
<fx3_sdk_installation_path>\EZ-USB FX3 SDK\1.3\firmware\msc_examples
2)What is your IO matrix configuration? Did you enable both S0 and S1 port?
3)Are you using custom hardware or Cypress DVK?
4)Can you please list the SIB functions that you have used in your code? It's good if you can share your complete firmware here.
yes,enabled,I am using only s0 port and in 4 bit interface.
Did you test the msc example projects in your hardware? Is it enumerating?
Can you please share your complete firmware here?