AR# 7995

4.1i 4000XL MAP - "ERROR:OldMap:256 - Clock buffer BUFG symbol "..." cannot be converted to a BUFGLS due to location constraints."

描述

Keywords: OldMap 256, BUFGLS, UCF

Urgency: Standard

General Description:
When I use pin LOC constraints on global clocks, the MAP report displays:

ERROR:OldMap:256 - Clock buffer BUFG symbol "..." cannot be converted to a BUFGLS due to location constraints.

解决方案

To work around this problem, LOC the clock buffer instead of using a pin LOC constraint.

For example:

INST "bufg_instance" LOC = "BUFGLS_SSW";

Clock buffers' LOCs are based on compass directions (SSW, NNW, NNE, etc.)

There are currently no plans to fix this.

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AR# 7995
日期	06/13/2002
状态	Archive
Type	综合文章

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AR# 7995

4.1i 4000XL MAP - "ERROR:OldMap:256 - Clock buffer BUFG symbol "..." cannot be converted to a BUFGLS due to location constraints."

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