Answers Database

Differences between the 7318/7336 and 7354/7372/73108/73144


Record #472

Product Family:  Hardware

Product Line:  7300

Problem Title:
Differences between the 7318/7336 and 7354/7372/73108/73144


Problem Description:
Engineers designing for the XC7300 family of EPLDs should be aware of the
following architechtural differences between members of this family:

XC7318/36/144 vs. XC7354/72/108 Fast Function Blocks
============================================================
XC7318/36/144			       XC7354/72/108
------------------------------------------------------------
Output polarity control 		Fixed output polarity
Direct support for D- or T-flip-flop	D-flip-flop only
Flip-flop asynchronous set or reset	Flip-flop asynchronous set only

XC7318/36 vs. XC7354/72/108/144 I/O Blocks
============================================================
XC7318/36				XC7354/72/108/144
------------------------------------------------------------
Direct input only			Direct, latched, or registered input
No input polarity control		Input polarity control


Also note that, because the XC7318 and XC7336 contain only Fast Function
Blocks, all flip-flop clock signals must be on the FCLK nets, and all
output enable signals must be on the global FOE nets.


Solution 1:





End of Record #472