SOLID STATE MEMORY-BASED MASS STORAGE DEVICE USING OPTICAL INPUT/OUTPUT LINKS
A solid state memory-based mass storage device and a method of transferring data between a memory controller and at least one memory device of the mass storage device through optical input/output links that transmit multiplexed optical data signals between the memory device and controller.
1 . A solid state memory-based mass storage device comprising:
a carrier board including a system interface connector for connecting the carrier board to a host system;
at least one memory device with parallel input/output data connections;
a memory controller having input/output data connections through which the memory controller is connected to the parallel input/output data connections of the memory device;
an optical I/O link that connects the input/output data connections of the memory controller to the parallel input/output data connections of the memory device;
means for generating multiplexed optical data signals that are transmitted across the optical I/O link; and
means for de-multiplexing the multiplexed optical data signals received from the optical I/O link and isolating individual optical data signals therefrom.
2 . The solid state memory-based mass storage device of claim 1 , wherein the memory device is a non-volatile solid-state memory device.
3 . The solid state memory-based mass storage device of claim 1 , wherein the generating means performs wavelength division multiplexing to generate the multiplexed optical data signals.
4 . The solid state memory-based mass storage device of claim 1 , further comprising an optical transmitter for generating optical data signals from which the multiplexed optical data signals are generated by the generating means.
5 . The solid state memory-based mass storage device of claim 4 , wherein the optical transmitter is a light emitting diode.
6 . The solid state memory-based mass storage device of claim 1 , further comprising an optical receiver that receives the individual optical data signals from the de-multiplexing means and generates electrical data signals therefrom.
7 . The solid state memory-based mass storage device of claim 6 , wherein the optical receiver is a photodiode or a phototransistor.
8 . The solid state memory-based mass storage device of claim 1 , wherein the optical I/O link is a single bidirectional optical link.
9 . The solid state memory-based mass storage device of claim 1 , wherein the optical I/O link comprises two optical links in full duplex mode.
10 . The solid state memory-based mass storage device of claim 1 , wherein the memory device is a first memory device, the solid state memory-based device further comprises a second memory device, and the first and second memory devices share the optical I/O link.
11 . The solid state memory-based mass storage device of claim 10 , wherein the optical I/O link is arranged between the two memory devices in a clamshell configuration.
12 . A solid state memory-based mass storage device comprising:
a carrier board including a system interface connector for connecting the carrier board to a host system;
a plurality of non-volatile memory devices each with parallel input/output data connections;
a memory controller having input/output data connections through which the memory controller is connected to the parallel input/output data connections of the memory devices;
means for performing wavelength division multiplexing on parallel input/output optical data signals to generate parallel multiplexed optical data signals;
an optical I/O link that connects the input/output data connections of the memory controller to the parallel input/output data connections of a group of the memory devices and transmits the parallel multiplexed optical data signals between the memory controller and the group of memory devices; and
means for de-multiplexing the parallel multiplexed optical data signals associated with the group of memory devices, isolating individual optical data signals of the parallel multiplexed optical data signals, and distributing the individual optical data signals across parallel input/output data connections on the memory controller.
13 . The solid state memory-based mass storage device of claim 12 , wherein more than one of the parallel input/output data connections of each memory device of the group of memory devices is connected to the optical I/O link.
14 . A method of transferring data between a memory controller and at least one memory device of a solid state memory-based mass storage device, the method comprising:
converting a plurality of electrical output data signals generated by a first of the memory controller and the memory device into optical data signals at different wavelengths;
multiplexing the optical data signals into wavelength division multiplexed signals;
transferring the wavelength division multiplexed signals over an optical I/O link;
de-multiplexing the wavelength division multiplexed signals into individual optical data signals;
converting the individual optical data signals into electrical signals; and
transmitting the electrical signals to a second of the memory controller and the memory device.
15 . The method of claim 14 , wherein the memory device is one of an array of memory devices functionally connected to the memory controller.
16 . The method of claim 15 , wherein at least two of the memory devices are arranged in a clamshell configuration and optical data signals of the at least two memory devices are combined in a common wavelength division multiplexed signal that is transmitted over the optical I/O link.
17 . The method of claim 15 , wherein the optical data signals from more than two memory devices of the array of memory devices are multiplexed into common wavelength division multiplexed signals, and common wavelength division multiplexed signals are de-multiplexed into individual optical data signals transmitted to the more than two memory devices.
18 . The method of claim 14 , wherein the at least one memory device is a non-volatile solid-state memory device.
19 . The method of claim 14 , wherein the optical I/O link is a single bidirectional optical link.
20 . The method of claim 14 , wherein the optical I/O link comprises two optical links in full duplex mode.
21 . A solid state memory-based mass storage device comprising:
a carrier board including a system interface connector for connecting the carrier board to a host system;
a plurality of non-volatile memory devices each with parallel input/output data connections;
a memory controller having input/output data connections through which the memory controller is connected to the parallel input/output data connections of the memory devices;
optical transmitters associated with the parallel input/output data connections of the memory devices and the memory controller for generating parallel input/output optical data signals;
means for performing wavelength division multiplexing on the parallel input/output optical data signals to generate parallel multiplexed optical data signals;
an optical I/O link that connects the input/output data connections of the memory controller to the parallel input/output data connections of a group of the memory devices and transmits the parallel multiplexed optical data signals between the memory controller and the group of memory devices;
means for de-multiplexing the parallel multiplexed optical data signals associated with the group of memory devices, isolating individual optical data signals of the parallel multiplexed optical data signals, and distributing the individual optical data signals across parallel input/output data connections on the memory controller; and
optical receivers associated with the parallel input/output data connections of the memory devices and the memory controller for receiving the individual optical data signals from the de-multiplexing means and generating electrical data signals therefrom;
wherein the optical transmitters and receivers are integrated at least on one of the memory devices and the memory controller.
22 . A three-dimensional memory structure comprising an optical interface substrate between two memory components, the memory components having integrated optical transmitters and receivers adapted for transmitting and receiving optical signals at specific wavelengths as input/output data connections, the optical interface substrate being configured to combine the specific wavelengths into a wavelength multiplexed common signal transmitted from the memory structure through a common optical link.