JPH02285811A - Semiconductor integrated circuit - Google Patents
Semiconductor integrated circuitInfo
- Publication number
- JPH02285811A JPH02285811A JP1108583A JP10858389A JPH02285811A JP H02285811 A JPH02285811 A JP H02285811A JP 1108583 A JP1108583 A JP 1108583A JP 10858389 A JP10858389 A JP 10858389A JP H02285811 A JPH02285811 A JP H02285811A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- input
- output
- switch
- power
- 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
- 239000004065 semiconductor Substances 0.000 title claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Semiconductor Integrated Circuits (AREA)
- Logic Circuits (AREA)
- Dram (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、半導体集積回路（以下ＩＣという）の入力、
出力ボートの電源に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to the input of a semiconductor integrated circuit (hereinafter referred to as IC),
Concerning the power supply of the output boat.
従来のＩＣの入力、出力ボートの電源は、そのＩＣの電
源電圧により、その電圧に単一に決まっている。The power supplies for the input and output ports of a conventional IC are determined to be a single voltage depending on the power supply voltage of the IC.
しかしながら、従来技術では電源電圧範囲が違う二つの
ＩＣを接続する場合、その間に電圧変換用ＩＣを用いな
ければならないという問題点を有している。However, the conventional technology has a problem in that when two ICs with different power supply voltage ranges are connected, a voltage conversion IC must be used between them.
本発明は、このような問題点を解決するもので、その目
的とするところは電圧変換用ＩＣを用いず、直接二つの
ＩＣを接続することにある。The present invention is intended to solve these problems, and its purpose is to directly connect two ICs without using a voltage conversion IC.
本発明の半導体装置は、
ａ）複数の入力、出力手段をもつ半導体集積回路におい
て、
ｂ）二つの異なる電源入力手段と、
Ｃ）前記入力、出力手段の電源を、前記二つの異なる電
源入力手段のどちらか一方から選択できる切替え手段と
を備えたことを特徴とする。A semiconductor device of the present invention includes: a) a semiconductor integrated circuit having a plurality of input and output means, b) two different power input means; and C) power for the input and output means is connected to the two different power input means. The invention is characterized by comprising a switching means that allows selection from either one of the two.
第１図は本発明の実施例を示す、入力回路の概略図であ
る。１１は３ｖの電源入力ポート、１２は５ｖの電源入
力ポート、１３はデータ入力ポート、１４は入力インバ
ータ、１５は内部の論理回路、１６は３ｖ電源と５ｖ電
源のどちらか一方をマスク切換え等の手段により選択す
るスイッチである。この入力回路は、内部の論理回路１
５を３Ｖ電源で駆動し、スイッチ１６を５ｖ電源入力ボ
ート１２に接続することで、入力ポート１３から５ｖの
データを入力することができるものである。FIG. 1 is a schematic diagram of an input circuit showing an embodiment of the present invention. 11 is a 3V power input port, 12 is a 5V power input port, 13 is a data input port, 14 is an input inverter, 15 is an internal logic circuit, 16 is a mask switch for either the 3V power supply or the 5V power supply, etc. This is a switch selected by means. This input circuit is an internal logic circuit 1
5 is driven by a 3V power supply and the switch 16 is connected to the 5V power input port 12, 5V data can be input from the input port 13.
第２図も本発明の実施例を示す、出力回路の概略図であ
る。２１は３ｖの電源入力ポート、２２は５ｖの電源入
力ポート、２３はデータ出力ポート、２４は出力インバ
ータ、２５は内部の論理回路、２６は３ｖ電源と５Ｖｉ
源のどちらか一方をマスク切換え等の手段により選択す
るスイッチである。この出力回路は、内部の論理回路２
５を３Ｖ電源で駆動し、スイッチ２６を５ｖ電源入力ボ
ート２２に接続することで出力ポート２３から５Ｖのデ
ータを出力することができる。FIG. 2 is also a schematic diagram of an output circuit showing an embodiment of the present invention. 21 is a 3V power input port, 22 is a 5V power input port, 23 is a data output port, 24 is an output inverter, 25 is an internal logic circuit, 26 is a 3V power supply and 5Vi
This is a switch that selects one of the sources by means such as mask switching. This output circuit is the internal logic circuit 2
5 is driven by a 3V power source and the switch 26 is connected to the 5V power input port 22, 5V data can be output from the output port 23.
第３図は本発明のＩＣを用いた応用例である。FIG. 3 shows an application example using the IC of the present invention.
３１は３ｖの電池、３２は３Ｖ駆動ＩＣ，３］；を本発
明のＩＣ，３４は５Ｖ駆動ＩＣ，３５４；！５Ｖを発生
するレギュレータである。31 is a 3V battery, 32 is a 3V drive IC, 3] is an IC of the present invention, 34 is a 5V drive IC, 354;! This is a regulator that generates 5V.
本応用例は３Ｖの電池３１により、３Ｖ駆動■Ｃ３２及
び本発明のＩＣ３３を駆動し、また３Ｖ電池３１を二こ
直列にして６ｖを発生させ、それをレギュレータ１５に
より５ｖに降圧する。その５ｖ電圧を、５Ｖ駆動ＩＣ３
４および本発明のＩＣ３３に供給する。In this application example, a 3V battery 31 drives a 3V drive IC 32 and an IC 33 of the present invention, and two 3V batteries 31 are connected in series to generate 6V, which is stepped down to 5V by a regulator 15. The 5V voltage is changed to 5V drive IC3.
4 and the IC33 of the present invention.
本発明のＩ Ｃ３Ｂは、３Ｖ駆動ＩＣ３２とインタフェ
ースする入力、出力ポートの電源には３ｖ電池電源を用
い、５Ｖ駆動ＩＣ３４とインタフェースする入力、出力
ポートの電源には、レギュレータ３５で発生する５ｖ電
源を用いる。それにより、電源電圧の異なる二つのＩＣ
と、電圧変換用ＩＣを用いず直接にインタフェースする
ことができる。The IC3B of the present invention uses a 3V battery power source for the input and output ports that interface with the 3V drive IC 32, and uses the 5V power generated by the regulator 35 as the power source for the input and output ports that interface with the 5V drive IC 34. use As a result, two ICs with different power supply voltages
can be directly interfaced without using a voltage conversion IC.
本発明の半導体集積回路は、上述のように二つの異なる
電源電圧範囲のＩＣを、電圧変換用ＩＣを用いず直接接
続することができるため、装置全体のコストダウンがで
きるという利点を有する。The semiconductor integrated circuit of the present invention has the advantage that the cost of the entire device can be reduced because ICs with two different power supply voltage ranges can be directly connected without using a voltage conversion IC as described above.
第１図は、本発明の入力回路の概略図。 第２図は、本発明の出力回路の概略図。 第３図は、本発明のＩＣを用いた装置の概略図。 ３１ ・ ３３ ・ ３４・ ３５◆ ・３ｖ電池 ・３ｖ駆動ＩＣ ・本発明のｒｃ ・５ｖ駆動ＩＣ ・レギュレータ 以 上。 １１ ・ １２・ １３・ １４ φ １５ ・ １６・ ２１争 ２２ ・ ２３ φ ２４ ・ ２５・ ２６・ ・３ｖ電源入力ボート ・５Ｖ電源入力ボート ・データ入力ポート ・入力インバータ ・論理回路 ・スイッチ ・３Ｖ電源入力ポート ・５ｖ電源入力ボート ・データ出力ポート ・出力インバータ ・論理回路 ・スイッチ 出願人 セイコーエプソン株式会社 FIG. 1 is a schematic diagram of an input circuit of the present invention. FIG. 2 is a schematic diagram of the output circuit of the present invention. FIG. 3 is a schematic diagram of a device using the IC of the present invention. 31・ 33・ 34・ 35◆ ・3v battery ・3v drive IC ・RC of the present invention ・5v drive IC ·regulator that's all. 11・ 12・ 13. 14 φ 15・ 16. 21st race 22・ 23 φ 24・ 25・ 26・ ・3v power input boat ・5V power input boat ・Data input port ・Input inverter ・Logic circuit ·switch ・3V power input port ・5v power input boat ・Data output port ・Output inverter ・Logic circuit ·switch Applicant: Seiko Epson Corporation
Claims (1)
て、 ｂ）二つの異なる電源入力手段と、 ｃ）前記入力、出力手段の電源を、前記二つの異なる電
源入力手段のどちらか一方から選択できる切替え手段と
を備えたことを特徴とする半導体集積回路。[Scope of Claims] a) A semiconductor integrated circuit having a plurality of input and output means, b) two different power input means; and c) power for the input and output means is connected to one of the two different power input means. A semiconductor integrated circuit characterized by comprising a switching means that allows selection from either one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1108583A JPH02285811A (en) | 1989-04-27 | 1989-04-27 | Semiconductor integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1108583A JPH02285811A (en) | 1989-04-27 | 1989-04-27 | Semiconductor integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02285811A true JPH02285811A (en) | 1990-11-26 |
Family
ID=14488490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1108583A Pending JPH02285811A (en) | 1989-04-27 | 1989-04-27 | Semiconductor integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02285811A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05120861A (en) * | 1991-10-25 | 1993-05-18 | Matsushita Electric Ind Co Ltd | Memory card system |
| JPH05145071A (en) * | 1991-09-30 | 1993-06-11 | Fujitsu Ltd | Mis field-effect semiconductor device and manufacture thereof |
| JPH05144252A (en) * | 1991-11-22 | 1993-06-11 | Mitsubishi Electric Corp | Memory ic |
| KR980010693A (en) * | 1996-07-01 | 1998-04-30 | ||
| EP0884848A1 (en) * | 1997-06-10 | 1998-12-16 | Siemens Aktiengesellschaft | Circuit for producing digital signals |
-
1989
- 1989-04-27 JP JP1108583A patent/JPH02285811A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05145071A (en) * | 1991-09-30 | 1993-06-11 | Fujitsu Ltd | Mis field-effect semiconductor device and manufacture thereof |
| JPH05120861A (en) * | 1991-10-25 | 1993-05-18 | Matsushita Electric Ind Co Ltd | Memory card system |
| JPH05144252A (en) * | 1991-11-22 | 1993-06-11 | Mitsubishi Electric Corp | Memory ic |
| KR980010693A (en) * | 1996-07-01 | 1998-04-30 | ||
| EP0884848A1 (en) * | 1997-06-10 | 1998-12-16 | Siemens Aktiengesellschaft | Circuit for producing digital signals |
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