Browse Prior Art Database

METHOD FOR INCREASING MAXIMUM NUMBER OF PORTS IN AN I/O MACRO

IP.com Disclosure Number: IPCOM000005931D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-16
Document File: 2 page(s) / 96K

Publishing Venue

Motorola

Related People

Authors:
Barbara O'Neil

Abstract

Using a grid router to route a gate array requires that all macro ports (connection points) fall on a grid point. In the case of l/O macros on the periphery of the array (fig. 1) this requires that the ports fall on a common multiple of the x and y grid increments. For Mosaic III the horizontal pitch is 6.0 urn and the vertical pitch is 4.5 urn. (fig. 2). This requires the ports to be on an 18 urn pitch.