ACF126Synaptics TouchPad Interfacing Guide 510-000080 - A Second Edition Synaptics, Inc. 2381 Bering Drive San Jose, California 95131 (408) 434-0110 Fax (408) 434-9819 Created: Revision: Printed: 2.0 2.5 March 25, 1998 January 18, 2000 January 22, 2001 1. Overview This guide describes how computers and other hosts interface to the Synaptics TouchPad. The first section describes the TouchPad generally, including operating modes, features, host interactions, and principles of operation, with many historical notes comparing older versions of the Synaptics TouchPad with the present one, version 4.5. (See page 4.) The Synaptics TouchPad family supports a variety of protocols for communicating with the host computer. The next few sections describe the available protocols: The PS/2 protocol is t……