KR950020701A - Data protection device of removable memory card - Google Patents

Data protection device of removable memory card Download PDF

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Publication number
KR950020701A
KR950020701A KR1019930030908A KR930030908A KR950020701A KR 950020701 A KR950020701 A KR 950020701A KR 1019930030908 A KR1019930030908 A KR 1019930030908A KR 930030908 A KR930030908 A KR 930030908A KR 950020701 A KR950020701 A KR 950020701A
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KR
South Korea
Prior art keywords
buffer
control
signal
state
memory card
Prior art date
Application number
KR1019930030908A
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Korean (ko)
Other versions
KR960003592B1 (en
Inventor
이성수
최각진
윤병우
정용주
Original Assignee
양승택
재단법인 한국전자통신연구소
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 양승택, 재단법인 한국전자통신연구소 filed Critical 양승택
Priority to KR1019930030908A priority Critical patent/KR960003592B1/en
Publication of KR950020701A publication Critical patent/KR950020701A/en
Application granted granted Critical
Publication of KR960003592B1 publication Critical patent/KR960003592B1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/24—Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00
    • G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
    • G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
    • G11C7/1057—Data output buffers, e.g. comprising level conversion circuits, circuits for adapting load

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Power Sources (AREA)
  • Storage Device Security (AREA)

Abstract

본 발명은 휴대용 단말장치의 보조기억 장치인 메모리 카드를 탈착할 때 또는 장착후 전원을 차단할 때 발생할 수 있는 기억카드내의 데이타 손상을 방지하기 위한 탈착식 기억카드의 데이타 보호 장치에 관한 것이며, 외부 신호를 입력받으며, B측을 쓰리 스테이드 상태로 설정하며, 메모리에 신호를 전달하는 버퍼(2); 메모리 카드 분리시 A측으로부터 입력되는 신호를 차단하기 위하여 장해 신호를 막기 위해 메모리에 신호변화가 발생되지 않도록 상기 버퍼(2)를 제어하며, 외부신호가 메모리에 도달하도록 상기 버퍼(2)를 제어하는 버퍼 컨트롤(4); 외부전원 공급의 유무, 전압강하 상태를 감시하며, 그 상태를 상기 버퍼 컨트롤(4)에 전달하여 전원을 제어하여 상기 버퍼 컨트롤(4)에서의 상기 버퍼(2)의 제어신호로 사용되도록 하는 파워 버퍼(6); 상기 파워 버퍼(6)의 신호를 전달받아 외부전원과 내부전원 선택하도록 하며, 상기 버퍼 컨트롤(4)에 선택 결과를 통보하도록 하는 파워 공급 컨트롤(8); 상기 버퍼 컨트롤과(4) 파워 공급 컨트롤(8)에 신호를 보내 외부전원 에서 내부 전원(12)으로 전환하고 전원 단락상태를 차단하며, 본체로 부터 분리명령을 받거나, 분리되는 것을 감지하도록 하는 신호 상태 감지부(10)를 포함하여 구성되는 것을 특징으로 한다.The present invention relates to a data protection device of a removable memory card for preventing data corruption in a memory card that may occur when a memory card, which is an auxiliary memory device of a portable terminal device, or when the power is cut off after installation. A buffer (2) which receives an input, sets the B side to a three state state, and transmits a signal to a memory; In order to block the signal input from the A side when removing the memory card, the buffer 2 is controlled so that a signal change is not generated in the memory to prevent an interference signal, and the buffer 2 is controlled so that an external signal reaches the memory. A buffer control 4; Power supply for monitoring the presence or absence of external power supply and voltage drop, and transmitting the state to the buffer control 4 to control the power to be used as a control signal of the buffer 2 in the buffer control 4. Buffer 6; A power supply control 8 for receiving the signal from the power buffer 6 to select an external power source and an internal power source, and to notify the buffer control 4 of the selection result; Sends a signal to the buffer control (4) and the power supply control (8) to switch from the external power source to the internal power source (12) and cut off the power short-circuit state, to receive a separation command from the main body, or to detect the separation It is characterized in that it comprises a state sensing unit (10).

Description

탈착식 기억카드의 데이타 보호장치Data protection device of removable memory card

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 의한 기억카드의 데이타 보호 장치를 나타내는 블록 구성도.2 is a block diagram showing a data protection device of a memory card according to the present invention.

Claims (1)

탈착식 기억카드의 데이타 보호장치에 있어서, 입출력 데이타 버스와 컨트롤 버스의 신호를 입력받으며, B측을 쓰리 스테이드(three state)상태로 설정하며, 메모리에 신호를 전달하는 버퍼(2); 메모리 카드 분리시 A측으로부터 입력되는 신호를 차단하여 외부 입출력단자 개방상태에서 발생하는 장해 신호를 막기 위해 메모리에 신호변화가 발생되지 않도록 상기 버퍼(2)를 제어하며, 장치에 접속되어 사용시 외부신호가 메모리에 도달하도록 상기 버퍼(2)를 제어하는 버퍼 컨트롤(4); 외부전원 공급의 유무, 전압강하 상태를 감시하며, 감시된 상태를 상기 버퍼 컨트롤(4)에 전달하여 전원을 제어하여 상기 버퍼 컨트롤(4)에서의 상기 버퍼(2)의 제어 신호로 사용되도록 하는 파워 버퍼(6); 상기 파워 버퍼(6)의 신호를 전달받아 외부전원과 내부전원 선택하도록 하며, 상기 버퍼 컨트롤(4)에 선택 결과를 통보하도록 하는 파워 공급 컨트롤(8); 상기 버퍼 컨트롤과(4) 파워 공급 컨트롤(8)에 신호를 보내 외부전원에서 내부전원(12)으로 전환하고 전원 단락상태를 차단하며, 본체로 부터 분리명령을 받거나, 분리되는 것을 감지하도록 하는 신호 상태 감지부(10)를 포함하여 구성되는 것을 특징으로 하는 탈착식 기억카드의 데이타 보호장치.A data protection device of a removable memory card, comprising: a buffer (2) for receiving signals from an input / output data bus and a control bus, setting the B side to a three state state, and transmitting a signal to a memory; When the memory card is removed, the buffer (2) is controlled so that a signal change is not generated in the memory in order to block a signal input from the A side to prevent a disturbance signal generated in the external input / output terminal open state. A buffer control (4) for controlling the buffer (2) to reach the memory; It monitors the presence or absence of external power supply and the voltage drop state, and transmits the monitored state to the buffer control 4 to control the power to be used as a control signal of the buffer 2 in the buffer control 4. Power buffer 6; A power supply control 8 for receiving the signal from the power buffer 6 to select an external power source and an internal power source, and to notify the buffer control 4 of the selection result; Sends a signal to the buffer control (4) and the power supply control (8) to switch from the external power source to the internal power source (12) and cut off the power short-circuit state, to receive a separation command from the main body, or to detect the separation Data protection device of a removable memory card, characterized in that it comprises a state detection unit (10). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930030908A 1993-12-29 1993-12-29 Data protection device of memory card KR960003592B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930030908A KR960003592B1 (en) 1993-12-29 1993-12-29 Data protection device of memory card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930030908A KR960003592B1 (en) 1993-12-29 1993-12-29 Data protection device of memory card

Publications (2)

Publication Number Publication Date
KR950020701A true KR950020701A (en) 1995-07-24
KR960003592B1 KR960003592B1 (en) 1996-03-20

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ID=19373897

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930030908A KR960003592B1 (en) 1993-12-29 1993-12-29 Data protection device of memory card

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000009441A (en) * 1998-07-24 2000-02-15 구자홍 Apparatus for preventing wrong operation caused by removal of external memory card

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000009441A (en) * 1998-07-24 2000-02-15 구자홍 Apparatus for preventing wrong operation caused by removal of external memory card

Also Published As

Publication number Publication date
KR960003592B1 (en) 1996-03-20

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