The overall benefit of this training is an increased CA signal window and improved bus stability during operation. DQ and DQS Training DQ and DQS training is done in a multiphase set of routines using newly defined features and functions. These individual routines, such as read training, read ...
参考图5,维护装置502包括:ddc(dqs drift compensation,dqs信号漂移补偿)控制逻辑504;tcr控制逻辑506;仲裁逻辑电路508,负责仲裁ddc、tcr或其他申请控制命令总线输出的逻辑电路;命令发送模块510;地址控制线输出io(ca tx io)电路512;dq发送延迟更新模块514;dq发送接收io(dqtx/rx io)接口电路516;数据接收模块518,包括读...
DDR5内存子系统定时通过MRR命令读取DQS拷贝电路环形振荡器计数值之后,和系统初始训练得到的初始值通过计算可知道DQS延迟变化情况,通过调整控制器DQ延迟,可使得DRAM内部DQS采样DQ信号有可靠的建立时间和保持时间裕量,保证DRAM写数据功能正确。 由于内存总线数据速率高,为提高系统抗干扰性,服务器系统使用ECC DIMM(Error ...