JPS62134136U - - Google Patents
Info
- Publication number
- JPS62134136U JPS62134136U JP2133286U JP2133286U JPS62134136U JP S62134136 U JPS62134136 U JP S62134136U JP 2133286 U JP2133286 U JP 2133286U JP 2133286 U JP2133286 U JP 2133286U JP S62134136 U JPS62134136 U JP S62134136U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- supply circuit
- circuit
- output voltage
- 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
- 238000000034 method Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は、本考案のデータ処理装置を示す電気
回路図、第２図は従来のデータ処理装置を示す電
気回路図、第３図は第１図、第２図に示した本考
案及び従来のデータ処理装置動作を説明するため
のタイミングチヤートである。
１……車載バツテリ、２……イグニツシヨンス
イツチ、３……主電源回路、４……電源切換回路
、５′……バツクアツプ電源回路、６……ＣＰＵ
、８……入力インターフエイス、９……出力イン
ターフエイス、１０……比較回路。尚、図中同一
符号は、同一又は相当部分を示す。
FIG. 1 is an electric circuit diagram showing a data processing device of the present invention, FIG. 2 is an electric circuit diagram showing a conventional data processing device, and FIG. 3 is a diagram showing the present invention and the conventional data processing device shown in FIGS. 2 is a timing chart for explaining the operation of the data processing device. 1... Vehicle battery, 2... Ignition switch, 3... Main power supply circuit, 4... Power supply switching circuit, 5'... Backup power supply circuit, 6... CPU
, 8...input interface, 9...output interface, 10...comparison circuit. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
も低く設定された電圧を出力するバツクアツプ電
源回路５′と、前記主電源回路３からの出力電圧
の所定の電圧値を基準にして前記主電源回路３及
びバツクアツプ電源回路５′を択一的に選択する
電源切換回路４と、前記主電源回路３の立上り及
び立下り時の出力電圧と前記バツクアツプ電源回
路５′の出力電圧とを比較し、前記電源切換回路
４が前記主電源回路３を選択して、かつ前記主電
源回路３の立上り時の出力電圧が前記バツクアツ
プ電源回路５′の出力電圧に一定電圧を加えた電
圧よりも小さいとき及び前記主電源回路３の立下
り時の出力電圧が前記バツクアツプ電源回路５′
の出力電圧に一定電圧を加えた電圧よりも小さく
なつたときに切換信号を出力する比較回路１０と
、外部から供給される信号を演算処理する演算処
理手段６１，６２、該演算処理手段で処理中のデ
ータ又は処理結果を一時的に記憶する一時記憶手
段６４及びスイツチ手段６５，６６を有し、該ス
イツチ手段に前記比較回路１０から切換信号の供
給を受けている間前記一時記憶手段６４のみに前
記電源切換回路４から前記バツクアツプ電源回路
５′からの電力の供給を受け、また前記切換信号
の供給を受けていない間、前記演算処理手段６１
，６２及び一時記憶手段６４に前記電源切換回路
４から前記主電源回路３からの電力の供給を受け
る中央処理部６とを備え、前記演算処理手段６１
，６２からの演算結果を処理出力となすことを特
徴とするデータ処理装置。 a main power supply circuit 3; a backup power supply circuit 5' that outputs a voltage set lower than the output voltage of the main power supply circuit; A power supply switching circuit 4 that selectively selects the power supply circuit 3 and the backup power supply circuit 5' compares the output voltage of the main power supply circuit 3 at rising and falling times with the output voltage of the backup power supply circuit 5'. , when the power supply switching circuit 4 selects the main power supply circuit 3 and the output voltage of the main power supply circuit 3 at startup is smaller than the voltage obtained by adding a constant voltage to the output voltage of the backup power supply circuit 5'. The output voltage of the main power supply circuit 3 at the time of falling is the output voltage of the backup power supply circuit 5'.
a comparator circuit 10 that outputs a switching signal when the voltage becomes smaller than the sum of the output voltage and a constant voltage; arithmetic processing means 61 and 62 that arithmetic-processes signals supplied from the outside; It has a temporary storage means 64 for temporarily storing data or processing results therein, and switch means 65, 66, and only the temporary storage means 64 is provided while the switch means is receiving a switching signal from the comparison circuit 10. While receiving power from the backup power supply circuit 5' from the power supply switching circuit 4, and not receiving the switching signal, the arithmetic processing means 61
, 62 and a central processing unit 6 which receives power from the main power supply circuit 3 from the power supply switching circuit 4 in the temporary storage means 64, and the arithmetic processing means 61.
, 62 as a processing output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2133286U JPS62134136U (en) | 1986-02-17 | 1986-02-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2133286U JPS62134136U (en) | 1986-02-17 | 1986-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62134136U true JPS62134136U (en) | 1987-08-24 |
Family
ID=30817679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2133286U Pending JPS62134136U (en) | 1986-02-17 | 1986-02-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62134136U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01173817U (en) * | 1988-05-13 | 1989-12-11 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5897719A (en) * | 1981-12-04 | 1983-06-10 | Matsushita Electric Ind Co Ltd | Power supply circuit |
| JPS5897720A (en) * | 1981-12-04 | 1983-06-10 | Matsushita Electric Ind Co Ltd | Power supply circuit |
| JPS60220415A (en) * | 1984-04-16 | 1985-11-05 | Hitachi Ltd | On-vehicle device containing memory function |
-
1986
- 1986-02-17 JP JP2133286U patent/JPS62134136U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5897719A (en) * | 1981-12-04 | 1983-06-10 | Matsushita Electric Ind Co Ltd | Power supply circuit |
| JPS5897720A (en) * | 1981-12-04 | 1983-06-10 | Matsushita Electric Ind Co Ltd | Power supply circuit |
| JPS60220415A (en) * | 1984-04-16 | 1985-11-05 | Hitachi Ltd | On-vehicle device containing memory function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01173817U (en) * | 1988-05-13 | 1989-12-11 |
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