Invention Grant
- Patent Title: Nonvolatile physical memory with DRAM cache
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Application No.: US17702505Application Date: 2022-03-23
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Publication No.: US11714752B2Publication Date: 2023-08-01
- Inventor: Frederick A. Ware , John Eric Linstadt , Christopher Haywood
- Applicant: Rambus Inc.
- Applicant Address: US CA San Jose
- Assignee: Rambus Inc.
- Current Assignee: Rambus Inc.
- Current Assignee Address: US CA San Jose
- Agency: Silicon Edge Law Group LLP
- Agent Arthur J. Behiel
- Main IPC: G06F12/0804
- IPC: G06F12/0804 ; G06F12/12 ; G11C14/00

Abstract:
A hybrid volatile/non-volatile memory module employs a relatively fast, durable, and expensive dynamic, random-access memory (DRAM) cache to store a subset of data from a larger amount of relatively slow and inexpensive nonvolatile memory (NVM). A module controller prioritizes accesses to the DRAM cache for improved speed performance and to minimize programming cycles to the NVM. Data is first written to the DRAM cache where it can be accessed (written to and read from) without the aid of the NVM. Data is only written to the NVM when that data is evicted from the DRAM cache to make room for additional data. Mapping tables relating NVM addresses to physical addresses are distributed throughout the DRAM cache using cache line bits that are not used for data.
Public/Granted literature
- US20220283941A1 Nonvolatile Physical Memory with DRAM Cache Public/Granted day:2022-09-08
Information query
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