# US 9,519,544 B2 · Memory module and operation method thereof

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- Number: US 9,519,544 B2
- Document ID: US9519544B2
- Status: Granted
- Kind: B2
- Application number: 14/489,064
- Filed: 2014-09-17
- Published: 2015-11-19
- Granted: 2016-12-13
- Earliest claimed: 2014-05-19
- Assignees: SK hynix Inc.
- Applicants: SK hynix Inc.
- Inventors: Choung-Ki Song
- Web page: https://patentgrep.com/patent/US9519544B2

## CPC

- G06F 11/1441: {Resetting or repowering}
- G06F 3/0619: {in relation to data integrity, e.g. data losses, bit errors}
- G06F 3/0647: {Migration mechanisms}
- G06F 3/0685: {Hybrid storage combining heterogeneous device types, e.g. hierarchical storage, hybrid arrays}
- G06F 11/2094: {Redundant storage or storage space (G06F11/2056 takes precedence)}
- G11C 5/14: Power supply arrangements {, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels}
- G11C 5/141: {Battery and back-up supplies}
- G06F 11/2015: {Redundant power supplies (power supply failure G06F1/30)}
- G11C 5/04: Supports for storage elements {, e.g. memory modules}; Mounting or fixing of storage elements on such supports
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G11C: STATIC STORES (semiconductor memory devices H10B)

## Abstract

A memory module includes an emergency power supply block, a volatile memory, a nonvolatile memory, and a control block configured to control data of the volatile memory to be backed up in the nonvolatile memory, by using a power supplied from the emergency power supply block, upon a power failure, and control the data of the volatile memory to be recovered, by using data backed up in the nonvolatile memory, upon a power recovery, wherein the control block controls the data of the volatile memory not to be backed up while controlling the data of the volatile memory to be recovered, even upon the power failure.

## Claims

### Claim 1

A memory module comprising:
an emergency power supply block;
a volatile memory;
a nonvolatile memory; and
a control block suitable for controlling data of the volatile memory to be backed up in the nonvolatile memory, by using a power of the emergency power supply block, upon a power failure, and controlling the data of the volatile memory to be recovered, by using data backed up in the nonvolatile memory, upon a power recovery,
wherein, after recovery of the data of the volatile memory is completed, a plurality of memory blocks in the nonvolatile memory are sequentially erased, and
wherein, when the power failure occurs while the plurality of memory blocks in the nonvolatile memory are sequentially erased, recovered data of the volatile memory are backed up in memory blocks completely erased among the plurality of memory blocks.

### Claim 2 (depends on 1)

The memory module according to claim 1, wherein, when the power failure occurs while the plurality of memory blocks in the nonvolatile memory are sequentially erased, the other memory blocks which are not erased among the plurality of memory blocks retain data backed up therein.

### Claim 3

An operation method of a memory module including a volatile memory and a nonvolatile memory, the method comprising:
sensing a failure in a host power;
converting a power of the memory module, from the host power to an emergency power;
backing up data of the volatile memory in the nonvolatile memory;
recovering the host power;
recovering the data of the volatile memory by using data backed up in the nonvolatile memory;
erasing sequentially a plurality of memory blocks in the nonvolatile memory after the recovering of the data of the volatile memory; and
backing up recovered data of the volatile memory in memory blocks completely erased among the plurality of memory blocks, when the power failure occurs in the erasing of the plurality of memory blocks.

### Claim 4 (depends on 3)

The operation method according to claim 3, wherein, in the backing up of the data of the volatile memory in the memory blocks completely erased, the other memory blocks which are not erased among the plurality of memory blocks retain data backed up therein.