METHOD AND APPARATUS FOR AN ACCELERATED GRAPHIC PORT USING DIFFERENTIAL SIGNALING

摘要

An accelerated graphic port connection is adapted for differential signaling. Two signal lines are provided for each graphic port and chipset connection signal and information is encoded as either a polarity or a magnitude of a voltage difference between the two signal lines. An enhanced graphic chip and chipset includes drivers and receivers capable of handling the differential signaling. The resulting accelerated graphic port architecture supports clocking data on both edges as well as source synchronous clocking. The enhanced accelerated graphic port architecture also supports split transactions, deep read pipelining, and the addition of new bus synchronization commands.