Nonvolatile memory systems with embedded fast read and write memories
View Patent ↗A nonvolatile memory system is described with novel architecture coupling nonvolatile storage memory with random access volatile memory. New commands are included to enhance the read and write performance of the memory system.
1. A nonvolatile memory system comprising:
a nonvolatile memory for storage of digital information arranged in multiple blocks for access;
a volatile random access memory for read and write operations coupled to said nonvolatile memory;
wherein the volatile random access memory and nonvolatile memory are controlled by one or more controllers;
wherein the nonvolatile memory system is coupled to a central processing unit;
wherein each block of the nonvolatile memory for storage has one or more pages of stored data accessible through the coupled volatile random access memory; and
wherein each page of a block is adapted to be substituted on the fly for any other page of a different block through address mapping;
wherein the one or more controllers control the volatile and nonvolatile memories to:
perform a read operation on the portion of the digital information to be read and retrieving and storing such from the given block at the associated addressable location,
perform a read operation from the volatile memory of any portion or all of the stored digital information in the volatile memory,
perform a write operation on any portion of the accessed read digital information from the volatile memory back to the same physical location in the volatile memory for storage therein, and
write the digital information stored in the volatile memory back to the nonvolatile memory at a different physical location with the same associated address from which it was read.
2. The nonvolatile memory system of claim 1 wherein the nonvolatile memory for storage is a floating gate flash memory.
3. The nonvolatile memory system of claim 1 wherein the nonvolatile memory for storage is a phase change memory.
4. The nonvolatile memory system of claim 1 wherein the nonvolatile memory for storage is a magnetic memory.
5. The nonvolatile memory system of claim 1 wherein the nonvolatile memory for storage is a ferroelectric memory.
6. The nonvolatile memory system of claim 1 wherein the nonvolatile memory for storage is a molecular memory.
7. The nonvolatile memory system of claim 1 wherein the volatile random access memory is a SRAM with at least one port for read and write access.
8. The nonvolatile memory system of claim 1 wherein the volatile random access memory is a dynamic random access memory with at least one port for read and write access.
9. The nonvolatile memory system of claim 1 wherein the volatile random access memory is a pseudo static RAM with at least one port for read and write access.
10. The nonvolatile memory system of claim 1 wherein the pages are randomly addressable and accessible.
11. The nonvolatile memory system of claim 10 wherein each of the randomly addressable and accessible pages is capable of addressing at least one bit in each access.
12. The nonvolatile memory system of claim 1 wherein the pages are serially addressable and accessible.
13. The nonvolatile memory system of claim 1 wherein the pages are randomly and serially addressable and accessible.