JPS6427744U - - Google Patents
Info
- Publication number
- JPS6427744U JPS6427744U JP12239187U JP12239187U JPS6427744U JP S6427744 U JPS6427744 U JP S6427744U JP 12239187 U JP12239187 U JP 12239187U JP 12239187 U JP12239187 U JP 12239187U JP S6427744 U JPS6427744 U JP S6427744U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- ram
- video ram
- drop
- detection circuit
- 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 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 claims 2
- 230000003068 static effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Power Sources (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Description
第１図はこの考案の機能ブロツク図、第２図、
第３図はこの考案の一実施例を示し、第２図はこ
の考案を適用したワードプロセツサの基本的な構
成を示すブロツク回路図、第３図は動作を示すタ
イムチヤートである。
１３……電源回路、１４……ＣＰＵ、１５……
システムＲＯＭ、１６……システムＲＡＭ、１９
……ビデオＲＡＭ、２２……バツクアツプ電源回
路、２３……検出回路、Ｃ０……コンデンサ。
Figure 1 is a functional block diagram of this invention, Figure 2,
FIG. 3 shows an embodiment of this invention, FIG. 2 is a block circuit diagram showing the basic configuration of a word processor to which this invention is applied, and FIG. 3 is a time chart showing the operation. 13...Power supply circuit, 14...CPU, 15...
System ROM, 16...System RAM, 19
...Video RAM, 22...Backup power supply circuit, 23...Detection circuit, C0 ...Capacitor.
Claims (1)
ビデオＲＡＭと、 このビデオＲＡＭの内容を保護するバツクアツ
プ電源回路と、 ダイナミツク型ＲＡＭによつて構成されてなる
システムＲＡＭと、 電源電圧が充電されるコンデンサと、 電源電圧の低下を検出する検出回路と、 この検出回路で電源電圧の低下が検出された際
に、前記コンデンサを駆動源として前記システム
ＲＡＭ内のデータを前記ビデオＲＡＭに転送する
転送制御部と、 を備えたことを特徴とするメモリバツクアツプ機
能を備えた電子機器。[Claims for Utility Model Registration] A video RAM constituted by a static type RAM, a backup power supply circuit for protecting the contents of this video RAM, a system RAM constituted by a dynamic type RAM, and a power supply. a capacitor charged with a voltage; a detection circuit that detects a drop in power supply voltage; and when the detection circuit detects a drop in power supply voltage, data in the system RAM is transferred to the video RAM using the capacitor as a drive source. An electronic device equipped with a memory backup function, characterized in that it is equipped with a transfer control section for transferring data to a computer, and a memory backup function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12239187U JPS6427744U (en) | 1987-08-10 | 1987-08-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12239187U JPS6427744U (en) | 1987-08-10 | 1987-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6427744U true JPS6427744U (en) | 1989-02-17 |
Family
ID=31370279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12239187U Pending JPS6427744U (en) | 1987-08-10 | 1987-08-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6427744U (en) |
-
1987
- 1987-08-10 JP JP12239187U patent/JPS6427744U/ja active Pending
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