Area Efficient Temporal Coding Schemes for Reducing Crosstalk Effects

Abstract

In this paper, we present some new crosstalk avoidance coding schemes devoted to on-chip busses. These schemes consist in encoding sequences of bits on each line of a bus transferring a packet in order to eliminate worst-case crosstalk patterns. They permit to improve the delay on the link at the cost of doubling the number of transmitted bits. The advantage of the presented solutions is that they have no wiring overhead, so they are independent from the bus bit-width. The coding schemes allow an increase of 50% of the data rate for a 1-mm bus. Moreover, the proposed solutions induce a direction in deep-submicron noise that can be used to implement a noise-tolerant system