JPS63135598U - - Google Patents
Info
- Publication number
- JPS63135598U JPS63135598U JP2594287U JP2594287U JPS63135598U JP S63135598 U JPS63135598 U JP S63135598U JP 2594287 U JP2594287 U JP 2594287U JP 2594287 U JP2594287 U JP 2594287U JP S63135598 U JPS63135598 U JP S63135598U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- voltage
- ram
- power
- memory
- 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
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000000717 retained effect Effects 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 1
- 230000005055 memory storage Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
Landscapes
- Static Random-Access Memory (AREA)
Description
第１図は本考案に係る直流電源回路、バツクア
ツプ回路等を示す電気回路図、第２図は本考案に
係るＲＡＭの保存状態判定フローチヤート、第３
図はバツクアツプ用コンデンサ電圧の変化を示す
図で、第４図は本考案の実施例である炊飯器の制
御系を示すブロツク図、第５図は従来のＲＡＭの
保存状態判定フローチヤート、第６図は従来のバ
ツクアツプ用コンデンサ電圧の変化を示す図であ
る。
符号、１：マイクロコンピユータ、Ｃ４：コン
デンサ、Ｑ３：トランジスタ（充電開始遅延手段
）。
FIG. 1 is an electric circuit diagram showing a DC power supply circuit, a backup circuit, etc. according to the present invention, FIG. 2 is a flowchart for determining the storage state of RAM according to the present invention, and FIG.
The figure shows changes in backup capacitor voltage, Figure 4 is a block diagram showing the control system of a rice cooker that is an embodiment of the present invention, Figure 5 is a flowchart for determining the storage state of a conventional RAM, and Figure 6 is a diagram showing the control system of a rice cooker according to an embodiment of the present invention. The figure shows changes in the voltage of a conventional backup capacitor. Symbol: 1: microcomputer, C4: capacitor, Q3: transistor (charging start delay means).
Claims (1)
よりＲＡＭの記憶内容を保持し、停電復帰等によ
る電源投入に伴い上記コンデンサの残留電圧を測
定し、その測定値をＲＡＭ保持最低電圧と比較し
てＲＡＭの記憶保存状態を判定すると共に上記コ
ンデンサの充電を開始するものにおいて、 上記コンデンサの残留電圧測定が完了してから
上記コンデンサの充電を開始させる充電開始遅延
手段を設けたことを特徴とするメモリーバツクア
ツプシステム。[Scope of Utility Model Registration Claim] During a power outage, etc., the memory contents of the RAM are retained by the voltage of the backup capacitor, and when the power is turned on when the power is restored, etc., the residual voltage of the capacitor is measured, and the measured value is the minimum value retained in the RAM. The apparatus starts charging the capacitor while determining the memory storage state of the RAM by comparing the voltage with the voltage, and a charge start delay means is provided to start charging the capacitor after measurement of the residual voltage of the capacitor is completed. A memory backup system featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2594287U JPS63135598U (en) | 1987-02-23 | 1987-02-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2594287U JPS63135598U (en) | 1987-02-23 | 1987-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63135598U true JPS63135598U (en) | 1988-09-06 |
Family
ID=30826562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2594287U Pending JPS63135598U (en) | 1987-02-23 | 1987-02-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63135598U (en) |
-
1987
- 1987-02-23 JP JP2594287U patent/JPS63135598U/ja active Pending
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