动态更新参考切片的IP核测试数据压缩方法

Test Data Compression Technique Using Dynamic Updating Reference Slices for IP Cores

为减少测试数据存储容量,提出一种动态更新参考切片的IP核测试数据压缩方法.使用3个扫描切片作为参考切片,若扫描切片与参考切片相容时,仅需2位或4位就可编码这个扫描切片,否则这个扫描切片将替换一个参考切片;当扫描切片与多个参考切片相容时,提出了有选择的相容合并策略,以进一步提高压缩率.实验结果表明,与同类方法相比,文中方法具有更高的测试压缩率.

To reduce test data storage volume,this paper proposes a test data compression technique which uses dynamic updating reference slices for IP cores.The proposed technique uses three slices as reference slices.If a scan slice is compatible to one of the reference slices,only two bits or four bits are needed to encode it.Otherwise,the scan slice will replace one reference slice.When a scan slice is compatible to multiple reference slices,a selective compatible merge strategy is proposed to further improve compression ratio.Experimental results show that the proposed technique has higher compression ratio in comparison with relevant compression methods.