Answers Database

XC7300 : How to force a wired-AND function into the UIM in Xabel-CPLD


Record #1190

Product Family:  Software

Product Line:  Data I/O

Problem Title:
XC7300 : How to force a wired-AND function into the UIM in Xabel-CPLD


Problem Description:
The UIM (Universal Interconnect Matrix) in the XC7300 is capable of
performing wired-AND functions.  The software will automatically
use this capability when possible to improve resource utilization.

However, it is possible to manually specify a function to be
implemented in the UIM, by using the NODE (UIM) statement in the
ABEL file.


Solution 1:

To force the CPLD fitter to implement the function in
the UIM, use the following XEPLD Property statement in the
Declarations section of the ABEL code:

XEPLD Property 'NODE (UIM) signal_name';

For example:

MODULE FORCE_UIM

Q0, Q1, Q2, Q3	   pin;
TCO		   pin;

XEPLD Property 'NODE (UIM) TCO';

EQUATIONS

TCO = Q0 * Q1 * Q2 * Q3;

END



End of Record #1190