UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!
  1. Xilinx - Adaptable Intelligence
  2. Support
  3. AR# 10677: 3.1i Foundation ISE ECS Schematic Capture - I/O buffer macros give NGDBuild errors: 463,455,466,467

AR# 10677

3.1i Foundation ISE ECS Schematic Capture - I/O buffer macros give NGDBuild errors: 463,455,466,467

Description

Keywords: WebPACK, obufe, obuf, ibuf, NGDBuild, NGD, Build, buffer, 463, 455,
466, 467, 9500

Urgency: Standard

General Description:
I/O buffer macros (ibuf 4,8,16; obuf 4,8,16; and obufe 4,8,16) give one of the following
errors or warnings:

ERROR:NgdBuild:455 - logical net 'xxx' has multiple drivers
WARNING:NgdBuild:463 - input pad net 'xxx has an illegal input buffer
ERROR:NgdBuild:466 - input pad net 'xxx' has illegal connection
ERROR:NgdBuild:467 - output pad net 'xxx' has an illegal buffer

Solution

1

Use multiple instances of single-buffer primitives instead of buffer macros.

To determine if a library element is a macro or a primitive, refer to the Libraries Guide
on support.xilinx.com.

2

Use individual primitives (ibuf, obuf, obufe) instead of the bulk buffers.
AR# 10677
Date 10/21/2002
Status Archive
Type General Article

By using this website, I accept the use of cookies.   Learn more

Page Bookmarked