通信状慴モニタリングに基づく低電力非同期乲列データ転送方式とその実琭に関する研究

摘要

近年の半導体微細加工技術の進展により，配線遅rn延のばらつきが顕著となり従来までの同期式制御のrn実現が困難となってきている.この間題の一解決rn法としてクロックを用いない非同期式制御があげらrnれる．筆者らの研究グループでは高性能な非同期デーrnタ転送である1相2線非同期データ転送を提案してきrnた．%This paper presents a design of an asynchronous peer-to-peer half-duplex/full-duplex-selectable data-transfer system on-chip interconnected. The data-transfer method between channels is based on a 1-phase signaling scheme realized by using multiple-valued current-mode (MVCM) circuits and encoding, which performs high-speed communication. A data transmission is selectable by adding a mode-detection circuit that observes data-transmission modes; full-duplex, half-duplex and standby modes. Especially, since current sources are completely cut off during the standby mode, the power dissipation can be greatly reduced. Moreover, both half-duplex and full-duplex communication can be realized by sharing a common circuit except a signal-level conversion circuit. The proposed interface is implemented using 0.18-μm CMOS, and its performance improvement is discussed in comparison with those of the other ordinary asynchronous methods.