A method and system for transferring information within a computer system is provided. The system includes a memory device that has a lower power mode in which data transfer circuitry is not driven by a clock signal, and a higher power mode in which data transfer circuitry is driven by a clock signal....http://www.google.fr/patents/US6209071?utm_source=gb-gplus-shareBrevet US6209071 - Asynchronous request/synchronous data dynamic random access memory
Asynchronous request/synchronous data dynamic random access memory