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AR# 11825

4.1i Virtex MAP - "ERROR:MapLib:317..." is reported when the "INIT=S" attribute is used with the FDRSE flip-flop

Description

Keywords: FDRSE, FDSRE, FDCPE, FDPCE, INIT, attribute, MAP, ERROR:MapLib:317

Urgency: Standard

General Description:
When I use the "INIT=S" attribute with the FDRSE flip-flop in a design that targets a Virtex device, MAP fails with the following error:

ERROR:MapLib:317 - Flop FDRSE symbol "u1" (output signal=N_output) has INITSTATE=1 and CLR dominates PRE. Virtex does not support this flop. To convert the flop into a FDPCE where PRE dominates CLR, set the environment variable XIL_MAP_FDCPE_I1_TO_FDPCE_I1.

(This message is misleading, as setting the variable actually converts the FDRSE to an FDSRE.)

Solution

The message text will be corrected in the first major software release following 4.2i.
AR# 11825
Date Created 06/21/2001
Last Updated 08/20/2003
Status Archive
Type General Article