针对全局异步、局部同步片上网络中不同传输速率下的数据传输问题,提出一种高速异步双轨推通道.该通道中的单元采用自应答控制,在减小前向延时的同时提高了吞吐率;双轨数据的传输采用对称结构的2条独立传输链路,避免了复杂的时序设计,降低了传输链路间的干扰,保证了数据的可靠传输.最后基于0.18pm标准CMOS工艺,在不同温度、不同工艺角下对4级通道的性能进行测试.结果表明,采用文中的异步通道前向延时为70ps,吞吐量为4.46GHz,功耗为2.71mw,可满足高速、低功耗、高鲁棒性的片上通信需求.
This paper proposes a novel high-speed asynchronous dual-rail push channel for the data transmission with varying transmission rate in globally asynchronous locally synchronous network-on- chip. With the self-acknowledgement control, the forward latency is reduced and the throughput is improved. Meanwhile, the asynchronous channel transmits dual-rail data through two independent transmission link with symmetric structure in order to avoid complex timing design, reduce transmission link interference and ensure reliable data transmission. Performance of four-stage channel has been verified under different fabrications and temperatures based on SMIC 0.18μm standard CMOS technology. Simulation results show that the forward latency is 70 ps, the average dynamic power dissipation is 2.71 mW with the throughput of 4.46 GHz, which can fulfill the requirements of high- speed, low power, highly robust on-chip communication.