A 3-mW, 270-Mbps, Clock-Edge Modulated Serial Link for Mobile Displays

Abstract

In this paper, a single channel clock-edge modulated serial link for mobile display interface is presented. Clock edge modulation (CEM) enables all necessary signals between a graphic processor and a LCD timing controller to be transferred over a single, DC-balanced differential channel, thus greatly saving the power and costs of the existing parallel lines. A simple DLL-based CEM decoder is described that recovers the data with low power consumption and high jitter tolerance. The use of a voltage-mode driver and a single-side termination further reduces the power. A prototype CEM transceiver was implemented in a 0.18mum CMOS process and dissipates 3.12mW when operating at 270-Mb/s and 1.2V