AR# 17852

Schematic - OBUFE symbol does not appear when I target a Spartan-3 (S3) device

描述

Keywords: ECS, OBUFT, 52i, ISE, schematic, macro

When I target a Spartan-3 device and use the ISE Schematic Editor for design entry, the symbol for an OBUFE macro is not present.

解决方案

To implement the OBUFE functionality in a Spartan-3 schematic design, you must use an OBUFT component and place an INVERTER connected to the "T" enable pin.

A user-created macro named OBUFE can be constructed with an INVERTER and OBUFT component to aid in creating multiple outputs with OBUFE functionality, or to aid in converting a schematic design from another device family.
AR# 17852
日期 03/05/2008
状态 Archive
Type 综合文章