UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

cancel
Showing results for 
Search instead for 
Did you mean: 
Visitor wtl121
Visitor
458 Views
Registered: ‎06-07-2018

XDC constraint

Both the IDDR and the IOB FF are driven only by the IBUF in the same IOB in my design.

 

MY CODE:

 

IOBUF iobuf_iodata(.I(iodata_mux),

                   .IO(iodata), //PAD

                   .O(iodata_buf),

                   .T(iodata_out[5]));

 

ODDR oddr_odata( .Q(iodata_mux), .C(iodata_out[6]), .CE(1), .D1(iodata_out[1]), .D2(iodata_out[3]), .R(0), .S(0));

 

IDDR iddr_idata( .Q1(iodata_in[0]) .Q2(iodata_in[1]), .C(iodata_out[6]), .CE(1), .D(iodata_buf), .R(0), .S(0));

assign iodata_in[2] = iodata_buf;

 

always@(clk)

    ss_iodata_in[2:0] <= iodata_in[2:0];

 

ss_iodata_in[2] be placed in ILOGIC,but i want IDDR to be placed in ILOGIC.

 

I try to design my XDC constraint file.as follow,

 

set_property LOC ILOGIC_X1Y497 [get_cells */iddr_odata]

set_property IOB FALSE [get_cells */ss_iodata_in[2]]

 

But this constraint is not used.

 

How design my XDC file?

0 Kudos
3 Replies
Xilinx Employee
Xilinx Employee
419 Views
Registered: ‎07-16-2008

回复: XDC constraint

IDDR is dedicated to be placed in ILOGIC.

How is the cell 'iddr_idata' placed then?

-------------------------------------------------------------------------
Don't forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------
0 Kudos
Highlighted
Visitor wtl121
Visitor
381 Views
Registered: ‎06-07-2018

回复: XDC constraint

In my result, vivado implementation failed, and ss_iodata_in[2] be placed in ILOGIC.

0 Kudos
Moderator
Moderator
376 Views
Registered: ‎01-16-2013

回复: XDC constraint

@wtl121

 

What is the error message in implementation? Can you please share the post-synthesis dcp file?

 

--Syed

---------------------------------------------------------------------------------------------
Kindly note- Please mark the Answer as "Accept as solution" if information provided is helpful.
Give Kudos to a post which you think is helpful and reply oriented.

Did you check our new quick reference timing closure guide (UG1292)?
---------------------------------------------------------------------------------------------
0 Kudos