JPS58159700U - Memory data protection circuit - Google Patents
Memory data protection circuitInfo
- Publication number
- JPS58159700U JPS58159700U JP10234282U JP10234282U JPS58159700U JP S58159700 U JPS58159700 U JP S58159700U JP 10234282 U JP10234282 U JP 10234282U JP 10234282 U JP10234282 U JP 10234282U JP S58159700 U JPS58159700 U JP S58159700U
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor memory
- protection circuit
- detector
- output
- data protection
- 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.)
- Granted
Links
Landscapes
- Power Sources (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案の実施例を示すブロック図、第２図はそ
の一部の回路図である。
図面で１はメモリ、２は制御回路、３は電源、４はバッ
テリ、７．９はゲート回路である。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a partial circuit diagram thereof. In the drawing, 1 is a memory, 2 is a control circuit, 3 is a power supply, 4 is a battery, and 7.9 is a gate circuit.
Claims (3)
テリを付設された半導体メモリの記憶データ保護回路に
おいて、入力データより特定のデータを検出する検出器
と、書込み命令が半導体メモリへ入力するのを該検出器
の出力に応じて′＃ＪＩＩ御するゲート回路を備え、該
ゲート回路はメモリへのデータ書込みに際して送出され
る第１の特定のデータを検出した前記検出器の出力によ
り書込み命令通過可能状態となり、また書込み終了で送
出される第２の特定のデータを検出した前記検出器出力
で書込み命令通過不可状態となることを特徴とする半導
体メモリの記憶データ保護回路。(1) In the storage data protection circuit of the semiconductor memory, which is equipped with a battery that continues to supply power when the device power is cut off, there is a detector that detects specific data from input data, and a write command is input to the semiconductor memory. The gate circuit is provided with a gate circuit that controls the output of the detector according to the output of the detector, and the gate circuit issues a write command based on the output of the detector that has detected the first specific data sent when writing data to the memory. 1. A storage data protection circuit for a semiconductor memory, wherein the storage data protection circuit for a semiconductor memory enters a state in which it is possible to pass, and becomes in a state in which it is not possible to pass a write command at the output of the detector that detects second specific data sent at the end of writing.
データのビット数と同じビット数のコードの１組または
複数組で構成されることを特徴とする実用新案登録請求
の範囲第１項記載の半導体メモリの記憶データ保護回路
。(2) Claim 1 of the Utility Model Registration Claim characterized in that the specific data is composed of one or more sets of codes having the same number of bits as the number of bits of the input data written into the semiconductor memory. storage data protection circuit for semiconductor memory.
ックとを入力とするアンドゲートからなり、該記憶素子
への特定のデータの書込みが該特定のデータのサンプル
クロックにより行なわれることを特徴とした実用新案登
録請求の範囲第１項または第２項記載の半導体メモリの
記憶データ保護回路。(3) The gate circuit comprises a memory element and an AND gate that receives the output of the element and a clock as inputs, and writing of specific data to the memory element is performed using a sample clock of the specific data. A storage data protection circuit for a semiconductor memory according to claim 1 or 2 of the registered utility model claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10234282U JPS58159700U (en) | 1982-07-06 | 1982-07-06 | Memory data protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10234282U JPS58159700U (en) | 1982-07-06 | 1982-07-06 | Memory data protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58159700U true JPS58159700U (en) | 1983-10-24 |
| JPS6117476Y2 JPS6117476Y2 (en) | 1986-05-28 |
Family
ID=30101086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10234282U Granted JPS58159700U (en) | 1982-07-06 | 1982-07-06 | Memory data protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58159700U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50159637A (en) * | 1974-06-12 | 1975-12-24 |
-
1982
- 1982-07-06 JP JP10234282U patent/JPS58159700U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50159637A (en) * | 1974-06-12 | 1975-12-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6117476Y2 (en) | 1986-05-28 |
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