从excel导入OrCAD原理

遇到管脚较多的芯片，做symbol都是一件头疼的事情，功夫多不说，还容易出错。
本文介绍怎样将excel中的管脚信息导入OrCAD，方便实用，还不会出错，excel源文档可以直接从芯片厂家下载。
E文版本，Lattice提供。
Generating a Schematic Symbol
for OrCAD Capture
September 2006 Application Note AN8075

Introduction
OrCAD Capture is a popular schematic design entry tool for system-level PCB design. The primary output of
Capture is a netlist report used to import component connectivity into a PCB layout product.

Since high-density FPGA packages can provide potentially hundreds of pins, the manual methods to create sche-
matic symbols can be tedious and error-prone. This note describes the recommended procedure to create symbols
using the data import/ex