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Explorer
Explorer
2,397 Views
Registered: ‎03-25-2010

dqs_ibuf does not have IOSTANDARD specified

Hello,

 

I'm having this error:

 

ERROR:LIT:600 - IOBUFDS symbol
   "DDR2_SDRAM/DDR2_SDRAM/u_ddr2_top/u_mem_if_top/u_phy_top/u_phy_io/gen_dqs[0].u_iob_dqs/gen_dqs_iob_ddr2.u_iobuf_dqs" (output
   signal=DDR2_SDRAM/DDR2_SDRAM/u_ddr2_top/u_mem_if_top/u_phy_top/u_phy_io/gen_d
   qs[0].u_iob_dqs/dqs_ibuf) does not have IOSTANDARD specified. Map is unable
   to generate a default IOSTANDARD for IOBUFDS, one has to be explicitly
   provided.

 

 

In the attachments you can find the UCF.

 

Any idea?

 

Thanks

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Highlighted
Instructor
Instructor
2,392 Views
Registered: ‎07-21-2009

what are the IO pins (location, signame) associated with the IOBUFDS IOs?

You might want to open PLANAHEAD app and check for "unassigned" pins.

SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

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