4 路 E1 反向复用 FPGA 设计方案 目 录 14 路 E1 反向复用 FPGA 设计方案.................................................................................................51 系统工作特点...............................................................................................................................52 检测和建链、拆链.......................................................................................................................52.1 寄存器定义............................................................................................................................52.2 检测和建链过程：.................................................................................................................72.3 拆链、重新建链和带宽自动调整.......................................................................................102.4 信令定义...............................................................................................................................112.5 复帧和宏帧..........................................................................................................................122.5.1 复帧的收发与同步.......................................................................................................122.5.2 宏帧的收发与同步........................................................................................................133 发送模块和接受模块工作流程..................................................................................................154 系统构成功能框图......................................................................................................................205 CPU 接口....................................................................................................................................215.1 功能......................................................................................................................................215.2 寄存器..................................
