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AR# 3831

M1.4 LogiBLOX - MAP may convert 5K LogiBLOX adder CY_MUX's to FG muxes, and leaves buffers in.

Description

Keywords: LogiBLOX, adder, carry, cy_mux, fg, xc5200, 5k

Urgency: Standard

General Description:
MAP may convert XC5200 Logiblox adder CY_MUX's to FG muxes.

There is currently a known problem with Map converting
CY_MUX's to FG muxes. This occurs after the CY_MUX used for
carry chain initialization has been optimized away.

Solution

A solution is currently under investigation.

As a work-around, you may use a similar component from the
Xilinx Unified Library instead.
AR# 3831
Date Created 08/31/2007
Last Updated 07/30/2001
Status Archive
Type General Article