Power-Aware Asynchronous Peer-to-Peer Duplex Communication System Based on Multiple-Valued One-Phase Signaling

Kazuyasu MIZUSAWA  Naoya ONIZAWA  Takahiro HANYU  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E91-C   No.4   pp.581-588
Publication Date: 2008/04/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e91-c.4.581
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Advanced Technologies in Digital LSIs and Memories)
Category: 
Keyword: 
delay-insensitive,  dual-rail encoding,  multiple-valued current-mode (MVCM) circuit,  peer-to-peer communication,  

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Summary: 
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.