JPS6353146U - - Google Patents
Info
- Publication number
- JPS6353146U JPS6353146U JP14690886U JP14690886U JPS6353146U JP S6353146 U JPS6353146 U JP S6353146U JP 14690886 U JP14690886 U JP 14690886U JP 14690886 U JP14690886 U JP 14690886U JP S6353146 U JPS6353146 U JP S6353146U
- Authority
- JP
- Japan
- Prior art keywords
- memory
- signal
- detection means
- protection device
- state
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Techniques For Improving Reliability Of Storages (AREA)
Description
第１，２図は本考案のメモリ保護装置の一実施
例を示す図であり、第１図はそのメモリ保護装置
の適用されたメモリの回路図、第２図ａ，ｂはそ
の作用を従来との比較において示した作用説明図
である。第３図は本考案のメモリ保護装置の他の
実施例を示す回路図である。第４図は従来のメモ
リ保護装置の回路図である。
１１……メモリボード、１４，１５，１６，１
７，３１，３２，３３……ＲＡＭ、１８……電圧
検出器、１９，３４……電圧検出器（電圧検出手
段）、２０……補助電源、２１，２２，３５，３
６……デコーダ、２３，２７……信号状態検出手
段、２４，ＡＮＤ１０……駆動手段。
1 and 2 are diagrams showing one embodiment of the memory protection device of the present invention, FIG. 1 is a circuit diagram of a memory to which the memory protection device is applied, and FIGS. FIG. FIG. 3 is a circuit diagram showing another embodiment of the memory protection device of the present invention. FIG. 4 is a circuit diagram of a conventional memory protection device. 11...Memory board, 14, 15, 16, 1
7, 31, 32, 33...RAM, 18...Voltage detector, 19, 34...Voltage detector (voltage detection means), 20...Auxiliary power supply, 21, 22, 35, 3
6... Decoder, 23, 27... Signal state detection means, 24, AND10... Driving means.
Claims (1)
れる電源の電圧が該メモリのアクセスに必要な所
定の電圧以上であるか否かを検出する電圧検出手
段と、該メモリのアクセス時に必要とされる信号
の状態を検出する信号状態検出手段と、該メモリ
に供給されている電源が該所定の電圧以上であり
、かつ該メモリへの信号がアクセス状態であると
き、該メモリをアクテイブ状態にする駆動手段と
、を備えたことを特徴とするメモリ保護装置。 (2) 前記信号状態検出手段がアドレス信号ある
いはデータ信号のいずれかの信号の状態を検出す
ることを特徴とする特許請求の範囲第１項記載の
メモリ保護装置。 (3) 前記信号状態検出手段がアドレス信号およ
びデータ信号の双方の信号の状態を検出すること
を特徴とする特許請求の範囲第１項記載のメモリ
保護装置。[Claims for Utility Model Registration] (1) Voltage detection means for detecting whether the voltage of a power supply supplied to a memory that requires backup is equal to or higher than a predetermined voltage necessary for accessing the memory; a signal state detection means for detecting the state of a signal required when accessing the memory; when the power supply being supplied to the memory is equal to or higher than the predetermined voltage and the signal to the memory is in an access state; A memory protection device comprising: driving means for activating the memory. (2) The memory protection device according to claim 1, wherein the signal state detection means detects the state of either an address signal or a data signal. (3) The memory protection device according to claim 1, wherein the signal state detection means detects the states of both address signals and data signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14690886U JPS6353146U (en) | 1986-09-25 | 1986-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14690886U JPS6353146U (en) | 1986-09-25 | 1986-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6353146U true JPS6353146U (en) | 1988-04-09 |
Family
ID=31059797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14690886U Pending JPS6353146U (en) | 1986-09-25 | 1986-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6353146U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11704964B2 (en) | 2007-01-09 | 2023-07-18 | Cfph, Llc | System for managing promotions |
-
1986
- 1986-09-25 JP JP14690886U patent/JPS6353146U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11704964B2 (en) | 2007-01-09 | 2023-07-18 | Cfph, Llc | System for managing promotions |
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