The license includes Rambus patents used in AMD chip interfaces, or the ways in which the chips communicate with one another. The license does not include Rambus’ memory-related patents.

Los Altos, California-based Rambus said the AMD agreement might be renewed or extended. The company declined to provide specifics of the deal.

Rambus chief executive Harold Hughes said in a statement that he was very pleased with the agreement.

Rambus has for years sought royalties from many of the industry’s largest memory chipmakers for allegedly infringing on some of its patents.