JPS61126329U - - Google Patents
Info
- Publication number
- JPS61126329U JPS61126329U JP493585U JP493585U JPS61126329U JP S61126329 U JPS61126329 U JP S61126329U JP 493585 U JP493585 U JP 493585U JP 493585 U JP493585 U JP 493585U JP S61126329 U JPS61126329 U JP S61126329U
- Authority
- JP
- Japan
- Prior art keywords
- ram
- backup
- voltage
- power source
- detection signal
- 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 4
- 238000012806 monitoring device Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Power Sources (AREA)
- Static Random-Access Memory (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
- Debugging And Monitoring (AREA)
Description
図面は、この考案のＲＡＭバツクアツプ監視装
置の１実施例を示し、第１図は結線図、第２図は
動作説明用のフローチヤートである。
２……ＲＡＭ、３……バツクアツプ用電源、１
５……検出回路、２２……表示回路、２３……Ｒ
ＡＭバツクアツプ監視装置。
The drawings show one embodiment of the RAM backup monitoring device of this invention, with FIG. 1 being a wiring diagram and FIG. 2 being a flowchart for explaining the operation. 2...RAM, 3...Backup power supply, 1
5...Detection circuit, 22...Display circuit, 23...R
AM backup monitoring device.
Claims (1)
したＲＡＭと、前記機器への給電停止時に前記Ｒ
ＡＭの記憶データの消失を防止する前記ＲＡＭの
バツクアツプ用電源と、前記機器の運転開始時に
前記バツクアツプ用電源によるバツクアツプ電圧
が前記ＲＡＭのデータ保持可能限界電圧以下か否
かを検出し、以下であるときに検出信号を出力す
る検出回路と、前記検出信号により前記バツクア
ツプ電圧の前記限界電圧以下への低下を表示、警
告する表示回路とを備えたＲＡＭバツクアツプ監
視装置。 RAM that stores data such as programs for controlling the operation of the equipment, and the R
A backup power source for the RAM that prevents loss of data stored in the AM, and detecting whether or not a backup voltage from the backup power source at the start of operation of the device is below a data retention limit voltage of the RAM; A RAM backup monitoring device comprising: a detection circuit that occasionally outputs a detection signal; and a display circuit that uses the detection signal to display and warn that the backup voltage has fallen below the limit voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP493585U JPS61126329U (en) | 1985-01-18 | 1985-01-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP493585U JPS61126329U (en) | 1985-01-18 | 1985-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61126329U true JPS61126329U (en) | 1986-08-08 |
Family
ID=30480981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP493585U Pending JPS61126329U (en) | 1985-01-18 | 1985-01-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61126329U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0417531A (en) * | 1990-05-08 | 1992-01-22 | Fujitsu Ltd | Monitoring device for backup power source of semiconductor storage device |
-
1985
- 1985-01-18 JP JP493585U patent/JPS61126329U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0417531A (en) * | 1990-05-08 | 1992-01-22 | Fujitsu Ltd | Monitoring device for backup power source of semiconductor storage device |
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