JPS625338U - - Google Patents
Info
- Publication number
- JPS625338U JPS625338U JP9380185U JP9380185U JPS625338U JP S625338 U JPS625338 U JP S625338U JP 9380185 U JP9380185 U JP 9380185U JP 9380185 U JP9380185 U JP 9380185U JP S625338 U JPS625338 U JP S625338U
- Authority
- JP
- Japan
- Prior art keywords
- input
- control
- circuit
- port
- voltage
- 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
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Power Sources (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Description
第１図は本考案の一実施例の要部を示すブロツ
ク回路図、第２図は制御回路において実行される
制御プログラムの要部を示すフローチヤート、第
３図１は制御信号の電源電圧の変化を示す電圧状
態図、第３図２は同図１に対応する電源ポートの
電圧の変化を示す電圧状態図、第４図は従来の要
部を示すブロツク回路図である。
１は記憶回路、１ａは電源ポート、１ｂは制御
ポート、３は電池、８は制御回路、１０は入力切
換手段である。
Fig. 1 is a block circuit diagram showing the main part of an embodiment of the present invention, Fig. 2 is a flowchart showing the main part of the control program executed in the control circuit, and Fig. 3 1 is a block circuit diagram showing the main part of the control program executed in the control circuit. FIG. 3 is a voltage state diagram showing changes in the voltage of the power supply port corresponding to FIG. 1, and FIG. 4 is a block circuit diagram showing the main parts of the conventional system. 1 is a memory circuit, 1a is a power supply port, 1b is a control port, 3 is a battery, 8 is a control circuit, and 10 is an input switching means.
Claims (1)
て作動状態になる記憶回路の記憶内容が停電時に
書き換わるのを防ぐように、上記記憶回路の駆動
用電力を入力する電源ポートと、制御信号を入力
する制御ポートとを電池でバツクアツプする記憶
回路のバツクアツプ装置において、制御回路の出
力が不定状態となる電圧よりも高い所定の基準電
圧以下になるときには制御ポートに上記電池の出
力を入力させ、その基準電圧を上回るときには制
御信号を入力させるように上記制御ポートの入力
を切換える入力切換手段を設けたことを特徴とす
る記憶回路のバツクアツプ装置。 In order to prevent the memory contents of the memory circuit that is activated by being supplied with drive power and control signals from the control circuit from being rewritten during a power outage, a power supply port for inputting the drive power of the memory circuit and a control signal are provided. In a storage circuit backup device that backs up an input control port with a battery, when the output of the control circuit falls below a predetermined reference voltage that is higher than the voltage that causes an undefined state, the output of the battery is input to the control port; 1. A backup device for a storage circuit, comprising input switching means for switching the input of the control port so that a control signal is input when the voltage exceeds a reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9380185U JPS625338U (en) | 1985-06-20 | 1985-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9380185U JPS625338U (en) | 1985-06-20 | 1985-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS625338U true JPS625338U (en) | 1987-01-13 |
Family
ID=30956688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9380185U Pending JPS625338U (en) | 1985-06-20 | 1985-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS625338U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0320167U (en) * | 1989-07-07 | 1991-02-27 |
-
1985
- 1985-06-20 JP JP9380185U patent/JPS625338U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0320167U (en) * | 1989-07-07 | 1991-02-27 |
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