ERMII encoding lookup tables optimized with different goals

Encoding and decoding tables for Enhanced Reduced Media-Independent Interface. Dataset contains 3 sets of lookup tables implementing encoder and decoder. Proposed encoder/decoder garantee that 2-bit TXD/RXD will change each data transmission cycle, making it possible for ERMII interface to work without REF_CLK, TX_EN and CRS_DV lines in difference to regular RMII.6b8b_encdec_v1.mat contains set of lookup tables optimized to minimize simultanious switching noise.6b8b_encdec_v2.mat contains set of lookup tables optimized to minimize number of periods without transition in a lower bit of bitpairs.6b8b_encdec_v3.mat contains set of lookup tables optimized to maximize number simulatnious transitions in both bits of bitpairs.test__6b8b.m contains encoder/decoder test script

增强型简化媒体独立接口（Enhanced Reduced Media-Independent Interface，ERMII）的编解码表数据集。本数据集包含3组用于实现编码器与解码器的查找表。所提出的编解码方案可确保每个数据传输周期内，2位TXD（发送数据）/RXD（接收数据）均发生跳变，使得ERMII接口无需依赖REF_CLK（参考时钟）、TX_EN（发送使能）以及CRS_DV（载波侦听/数据有效）信号线即可正常运行，这一点与常规简化媒体独立接口（Reduced Media-Independent Interface，RMII）截然不同。6b8b_encdec_v1.mat 包含一组用于最小化同步开关噪声的优化查找表；6b8b_encdec_v2.mat 包含一组用于最小化位对中低位无跳变周期数量的优化查找表；6b8b_encdec_v3.mat 包含一组用于最大化位对两位同步跳变次数的优化查找表。test__6b8b.m 为该编解码方案的测试脚本。