Answers Database

XC9500: How to set FAST slew rate for 9K outputs in PLUSASM and ABEL


Record #983

Product Family:  Hardware

Product Line:  9500

Problem Title:
XC9500: How to set FAST slew rate for 9K outputs in PLUSASM and ABEL


Problem Description:
Keywords: slew, xc9500, plusasm, fast, slow, abel

Urgency: standard

General Description
procedure to set slew rate for the xc9500 outputs in PLUSASM and ABEL


Solution 1:

You can set the slew rate in Plusasm using:

	FAST ON [optional signal list] - for FAST slew rate

		      OR

	FAST OFF [optional signal list] - for SLOW slew rate


Notes:

1. FAST slew rate can also be enabled in 73144 devices as well in
the same manner.

2. If no signal list follows "FAST ON"	in the PLD file, *all* outputs
are set to FAST slew rate.

3. Only one FAST statement is allowed in the design.

4. Default slew rate in M1 is FAST and SLOW in XACT 6.x




Solution 2:

In XABEL in M1 use:

 XILINX PROPERTY 'FAST|SLOW [optional signal list]'; - for EDIF flow

		      OR

 XEPLD PROPERTY 'FAST ON|OFF [optional signal list]'; - for PLUSASM flow


Notes:

1. FAST slew rate can also be enabled in 73144 devices as well in
the same manner.

2. If no signal list follows "FAST ON" , *all* outputs are set to FAST
slew rate.

3. Only one FAST statement is allowed in the design.

4. Default slew rate in M1 is FAST and SLOW in XACT 6.x





End of Record #983