# US 2014/0208052 A1 · Electronic device and method for protecting memory thereof

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- Number: US 2014/0208052 A1
- Document ID: US20140208052A1
- Status: Published application
- Kind: A1
- Application number: 14/159,399
- Filed: 2014-01-20
- Published: 2014-07-24
- Earliest claimed: 2013-01-24
- Assignees: Hon Hai Precision Industry Co., Ltd.; HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
- Applicants: Hon Hai Precision Industry Co., Ltd.; HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD
- Inventors: MING-YI CHEN; XIAO-YAN ZHANG
- Web page: https://patentgrep.com/patent/US20140208052A1

## CPC

- G06F 12/1425: {the protection being physical, e.g. cell, word, block}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

An electronic device includes a memory, an addressing unit, a status determination unit, and a control unit. The memory unit stores a memory status parameter. The addressing unit is configured for addressing an address of the memory status parameter of the memory. The status determination unit is configured for determining a status of the memory according to a value at the addressed address. The status of the memory can be a read-only status or a writable status. The control unit is configured for modifying the value at the address of the memory status parameter to make the memory be in the read-only status when the memory is in the writable status

## Claims

### Claim 1

A method for protecting a memory of an electronic device, the memory storing a memory status parameter, the method comprising:
locating an address of the memory status parameter of the memory;
determining a status of the memory according to the value at the located address, the status of the memory being in a read-only status or a writable status;
modifying the value at the address of the memory status parameter to make the memory to be in the read-only status when the memory is in the writable status.

### Claim 2 (depends on 1)

The method described as claim 1, wherein locating an address of a memory status parameter of the memory includes obtaining the address of the memory status parameter from a system management bus of the electronic device during a startup process of a host system the electronic device and reading the value at the addressed address.

### Claim 3 (depends on 1)

The method described as claim 1, wherein determining a status of the memory according to the addressed address includes determining the status of the memory according to the value at the address of the memory status parameter.

### Claim 4 (depends on 3)

The method described as claim 3, further comprising determining the status of the memory is in the read-only status when the value at the address is a first value.

### Claim 5 (depends on 3)

The method described as claim 3, wherein determining the status of the memory is in the writable status when the value at the address is a second value.

### Claim 6

An electronic device, comprising:
a memory storing memory status parameter;
an addressing unit, configured for locating the address of the memory status parameter of the memory;
a status determination unit, configured for determining a status of the memory according to the located address; the status of the memory being in a read-only status or a writable status;
a control unit, configured for modifying the value at the address of the memory status parameter to make the status of the memory to be in the read-only status when the status of the memory is in the writable status.

### Claim 7 (depends on 6)

The electronic device as described in claim 6, wherein the addressing unit is configured for obtaining the address of the memory status parameter from a system management bus of the electronic device during a startup process of a host system of the electronic device and reading the value at the address.

### Claim 8 (depends on 6)

The electronic device as described in claim 6, wherein the status determination unit determines the status of the memory according to the value at the address of the memory status parameter.

### Claim 9 (depends on 8)

The electronic device as described in claim 8, the status determination unit determines the status of the memory is in the read-only status when the value at the address is a first value.

### Claim 10 (depends on 8)

The electronic device as described in claim 8, the status determination unit determines the status of the memory is in the writable status when the value at the address is a second value.