Description

When generating 7Series Integrated Block Wrapper for PCI Express v1.7 core for AC701 Development boards, clock buffer and reset location in the generated XDC/UCF file do not match with the AC701 constraints. To get the example design to work on AC701 Development boards, the clock buffer and reset locations should be modified as follows.

Solution

If you are using an XDC file, please change them as follow in the generated example design's XDC file:

Clock Buffers:

From:
set_property LOC IBUFDS_GTE2_X0Y3 [get_cells refclk_ibuf]
To:
set_property LOC IBUFDS_GTE2_X0Y2 [get_cells refclk_ibuf]

Reset LOC:

From:
set_property IOSTANDARD LVCMOS18 [get_ports sys_rst_n]

To:
set_property LOC M20 [get_ports sys_rst_n]
set_property IOSTANDARD LVCMOS33 [get_ports sys_rst_n]

If you are using a UCF file, please change them as follow in the generated example design's UCF file:

Clock Buffers:

From:
INST "refclk_ibuf" LOC = IBUFDS_GTE2_X0Y3;
To:
INST "refclk_ibuf" LOC = IBUFDS_GTE2_X0Y2;

Reset LOC:

From:
NET "sys_rst_n" IOSTANDARD = LVCMOS18 | PULLUP | NODELAY ;

To:
NET "sys_rst_n" LOC = M20 | IOSTANDARD = LVCMOS33 | PULLUP | NODELAY ;

Revision History:
11/6/2012 - Added UCF Modification
10/18/2012 - Initial Release

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