Abstract: A memory subsystem and a method for use in accessing a memory system are disclosed. The memory subsystem comprising a plurality of SDRAM memory modules and a memory controller. The memory controller is capable of waiting to generate a memory clock signal for each of the SDRAM memory modules until a valid window for a control signal and an address signal; generating the memory clock signals during the valid window, and generating the control and address signals. The method comprises: waiting for a valid window for a control signal and an address signal; generating a memory clock during the valid window; and generating the control signal and the command signal a predetermined period of time after generating the memory clock signal.

Abstract: A multi-bank memory subsystem employing multiple memory modules. A memory subsystem includes a memory controller coupled to a memory bus. The memory bus includes a plurality of data paths each corresponding to a separate grouping of data lines. The memory bus is coupled to a first plurality of memory modules corresponding to a first memory bank. The first memory bank corresponding to a first range of addresses. The memory bus is also coupled to a second plurality of memory modules corresponding to a second memory bank. The second memory bank corresponding to a second range of addresses. A separate memory module of each of the first and the second memory banks is coupled to each data path of the memory bus. Memory modules that are coupled to the same data path are located adjacent to one another without any intervening memory modules coupled to other data paths.

Abstract: A memory module having balanced data input/output contacts. A memory module includes a printed circuit board having an edge connector and a plurality of memory integrated circuits. The edge connector may be adapted for insertion into a socket of a motherboard of a computer system, for example. The edge connector includes a plurality of contact pads on both sides of the printed circuit board. The contact pads are configured to convey data signals, power and ground to and from the printed circuit board. The power and ground contact pads alternate along the edge connector. There are no more than four data signal contact pads without intervening power or ground contact pads.

Abstract: A memory subsystem and a method for use in accessing a memory subsystem are disclosed. The memory subsystem comprising a plurality of SDRAM memory modules and a memory controller. The memory controller is capable of waiting to generate a memory clock signal for each of the SDRAM memory modules until a valid window for a control signal and an address signal, generating the memory clock signals during the valid window, and generating the control and address signals. The method comprises: the method comprises waiting for a valid window for a control signal and a command signal; generating a memory clock during the valid window; and generating the control signal and the command signal a predetermined period of time after generating the memory clock signal.

Abstract: A memory module having balanced data input/output contacts. A memory module includes a printed circuit board having an edge connector and a plurality of memory integrated circuits. The edge connector may be adapted for insertion into a socket of a motherboard of a computer system, for example. The edge connector includes a plurality of contact pads on both sides of the printed circuit board. The contact pads are configured to convey data signals, power and ground to and from the printed circuit board. The power and ground contact pads alternate along the edge connector. There are no more than four data signal contact pads without intervening power or ground contact pads.