Synchronous memory system for computer, has memory ranks with one-to-one correspondence with elements of select command segment

摘要

Commands including multiple segments (BS) having multiple elements (E) are generated and transferred to memory modules (16) via a transmission bus (22). The bus transmits the elements of a segment in parallel. The commands include a respective select command segment (R) for selecting one or more memory ranks (20). Each of the memory ranks has a one-to-one correspondence with at least one element of the select command segment. Independent claims are included for a method of communicating in a synchronous memory system; and for a protocol for communication in a synchronous memory system.