JPS6365200U - - Google Patents
Info
- Publication number
- JPS6365200U JPS6365200U JP15941386U JP15941386U JPS6365200U JP S6365200 U JPS6365200 U JP S6365200U JP 15941386 U JP15941386 U JP 15941386U JP 15941386 U JP15941386 U JP 15941386U JP S6365200 U JPS6365200 U JP S6365200U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- random access
- access memory
- power
- supply device
- 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 5
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Power Sources (AREA)
- Static Random-Access Memory (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Description
図は本考案の一実施例の系統図である。
１……ランダムアクセスメモリ、２……電源装
置、３……停電検出制御部、４……停電検出出力
トランジスタ、５……電源切換トランジスタ、６
……補助電源、７……リード／ライト許可制御部
、８……アドレスバス、９……バスインタイフエ
イストランジスタ。
The figure is a system diagram of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Random access memory, 2...Power supply device, 3...Power failure detection control unit, 4...Power failure detection output transistor, 5...Power switching transistor, 6
... Auxiliary power supply, 7 ... Read/write permission control section, 8 ... Address bus, 9 ... Bus-in-the-face transistor.
Claims (1)
、停電時に前記ランダムアクセスメモリの内容を
保持するために補助電源と、前記電源装置の出力
を検出する停電検出部と、停電検出により、前記
ランダムアクセスメモリの電源を前記電源装置か
ら前記補助電源に切換える電源切換制御部と、前
記ランダムアクセスメモリのアドレス空間を制御
するアドレス線によりコントロールされて前記ラ
ンダムアクセスメモリの制御回路において、 停電検出信号とアドレス線をオア接続すること
により、停電時は常に、メモリバツクアツプを必
要としないアドレス空間をアクセスすることを特
徴とするランダムアクセスメモリバツクアツプ装
置。[Claims for Utility Model Registration] Random access memory, a power supply device of the device, an auxiliary power supply for retaining the contents of the random access memory in the event of a power outage, a power failure detection unit that detects the output of the power supply device, and a power failure A power supply switching control unit that switches the power supply of the random access memory from the power supply device to the auxiliary power supply upon detection, and a control circuit of the random access memory controlled by an address line that controls an address space of the random access memory, A random access memory backup device characterized in that an address space that does not require memory backup is always accessed in the event of a power outage by OR-connecting a power outage detection signal and an address line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15941386U JPS6365200U (en) | 1986-10-20 | 1986-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15941386U JPS6365200U (en) | 1986-10-20 | 1986-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6365200U true JPS6365200U (en) | 1988-04-28 |
Family
ID=31083819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15941386U Pending JPS6365200U (en) | 1986-10-20 | 1986-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6365200U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02216562A (en) * | 1989-02-16 | 1990-08-29 | Mitsubishi Electric Corp | Memory access method |
-
1986
- 1986-10-20 JP JP15941386U patent/JPS6365200U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02216562A (en) * | 1989-02-16 | 1990-08-29 | Mitsubishi Electric Corp | Memory access method |
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