Answers Database
M1.5i/2.1i: Using the Tri-State IOB Flip-Flop in SpartanXL, XC4000XLA, and XC4000XV
Record #5140
Product Family: Software
Product Line: Merged Core
Product Part: Timing
Problem Title:
M1.5i/2.1i: Using the Tri-State IOB Flip-Flop in SpartanXL, XC4000XLA, and XC4000XV
Problem Description:
Urgency: Standard
General Description: In the 1_5i or 1_5.25 version of the
software a new flip-flop is introduced in the SpartanXL,
XC4000XLA, and XC4000XV. This flip-flop is connected to
the tri-state enable of the OBUFT. This allows for faster
output enable and disable times. Application Note 123 explains
how to utilize this flip-flop.
Solution 1:
The Application Note can be found on Xilinx web site:
http://support.xilinx.com/apps/xapp.htm
OR http://www.xilinx.com/xapp/xapp123.pdf
And the associated PERL script can be found on the
Xilinx's FTP site:
For the PC
ftp://ftp.xilinx.com/pub/utilities/fpga/make_macro.zip
For the workstation
ftp://ftp.xilinx.com/pub/utilities/fpga/make_macro.tar.Z
End of Record #5140 - Last Modified: 09/20/99 16:58 |
