FPGA 中的警告：Warning: Some pins have incomplete I/O assignments （Missing drive strength and slew rate）
摘要：
最近在FPGA程序全综合时碰到了个奇怪的问题：Warning: Some pins have incomplete I/O assignments. Refer to the I/O Assignment Warnings report for details查看了compilation report-> I/O Assignment Warnings 提示是 输出管脚“ Missing drive strength and slew rate”。记得用过CycloneII芯片就不会出现这种警告，google了下，是因为后续高级的芯片的 drive strength 和 slew rat 阅读全文
posted @ 2013-02-23 17:59 沉沉-_- 阅读(5335) 评论(2) 推荐(0) 编辑
