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AR# 3592

Spartan: What library components in the 4000E library are not supported by spartan devices

Description

Keywords: Spartan, 4000, fpga, comparison, 4KE, S10, S20, S30,
S40

Urgency: Standard

General Description: When designing into a Spartan part, 4000E library
is used as the design library. What 4000E library components can not be used in Spartan.

解决方案

These components must be avoided when targeting Spartan
even though they are technically available in the 4000E library.

1) Asynchronous RAM

Do not use the following components:
RAM16x1, RAM32x1, and other available depths

The following components may be used because they are synchronous:
RAM16x1S, RAM32x1S, RAM16x1D, ROM16x1, and other available depths

Also, do not use LogiBLOX to create asynchronous RAM components


2) Edge Decoders

Do not use the following components:
DECODE4, DECODE8, DECODE16


3) Wired-AND

Do not use the following components:
WAND1, WAND4, WAND8, WAND16, WOR2AND


4) Mode Pins as Usable I/O

Do not use the following components:
MD0, MD1, MD2
AR# 3592
创建日期 03/09/1998
Last Updated 11/07/2004
状态 Archive
Type 综合文章