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JPS57138220A - Data input equipment for logical circuit - Google Patents

Data input equipment for logical circuit

Info

Publication number
JPS57138220A
JPS57138220A JP56023025A JP2302581A JPS57138220A JP S57138220 A JPS57138220 A JP S57138220A JP 56023025 A JP56023025 A JP 56023025A JP 2302581 A JP2302581 A JP 2302581A JP S57138220 A JPS57138220 A JP S57138220A
Authority
JP
Japan
Prior art keywords
input
data input
input equipment
logical circuit
cmp6
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.)
Granted
Application number
JP56023025A
Other languages
Japanese (ja)
Other versions
JPH0257377B2 (en
Inventor
Toshimasa Kihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56023025A priority Critical patent/JPS57138220A/en
Publication of JPS57138220A publication Critical patent/JPS57138220A/en
Publication of JPH0257377B2 publication Critical patent/JPH0257377B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
    • H03K19/1731—Optimisation thereof
    • H03K19/1732—Optimisation thereof by limitation or reduction of the pin/gate ratio

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Microcomputers (AREA)
  • Electronic Switches (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To provide input pins of an LSI with more functions and to reduce its size by discriminating input signals, supplied via one input external terminal, by >=2 kinds of logical threshold voltages. CONSTITUTION:The levels of input signals supplied to external terminals D0- D7 are discriminated by corresponding input buffers BP0-BP7, and the levels of input signals supplied to said external terminals D0-D6 are also discriminated by corresponding comparators CMP0-CMP6 respectively. The output signals of said input buffers BP0-BP7 or said comparators CMP0-CMP6 are transferred to an internal data bus BUS by controlling switches S10-S17 or S20- S26 in accordance with the program of a microcomputer.
JP56023025A 1981-02-20 1981-02-20 Data input equipment for logical circuit Granted JPS57138220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56023025A JPS57138220A (en) 1981-02-20 1981-02-20 Data input equipment for logical circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56023025A JPS57138220A (en) 1981-02-20 1981-02-20 Data input equipment for logical circuit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP1029807A Division JPH021085A (en) 1989-02-10 1989-02-10 Data input device

Publications (2)

Publication Number Publication Date
JPS57138220A true JPS57138220A (en) 1982-08-26
JPH0257377B2 JPH0257377B2 (en) 1990-12-04

Family

ID=12098935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56023025A Granted JPS57138220A (en) 1981-02-20 1981-02-20 Data input equipment for logical circuit

Country Status (1)

Country Link
JP (1) JPS57138220A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59195846U (en) * 1983-06-10 1984-12-26 三洋電機株式会社 Input circuit of frequency divider circuit
JPS59195845U (en) * 1983-06-10 1984-12-26 三洋電機株式会社 Input circuit of frequency divider circuit
JPS60244123A (en) * 1984-05-18 1985-12-04 Fujitsu Ltd Cmos master slice semiconductor device
JPH021085A (en) * 1989-02-10 1990-01-05 Hitachi Ltd Data input device
JPH025168A (en) * 1988-06-22 1990-01-10 Nec Ic Microcomput Syst Ltd Microcomputer
JPH0525840U (en) * 1991-09-12 1993-04-02 日本電気株式会社 Input circuit of integrated circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0576266U (en) * 1992-03-24 1993-10-19 株式会社浅利研究所 Squid hook
JPH0613465U (en) * 1992-07-28 1994-02-22 株式会社浅利研究所 Squid hook

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4835762A (en) * 1971-09-10 1973-05-26
JPS5246748A (en) * 1975-10-09 1977-04-13 Mitsubishi Electric Corp Schmidt circuit
JPS5411167U (en) * 1977-06-24 1979-01-24
JPS55147039A (en) * 1979-05-04 1980-11-15 Mitsubishi Electric Corp Logic circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2281263A1 (en) * 1974-08-08 1976-03-05 Secmafer Sa ALL TERRAIN MACHINE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4835762A (en) * 1971-09-10 1973-05-26
JPS5246748A (en) * 1975-10-09 1977-04-13 Mitsubishi Electric Corp Schmidt circuit
JPS5411167U (en) * 1977-06-24 1979-01-24
JPS55147039A (en) * 1979-05-04 1980-11-15 Mitsubishi Electric Corp Logic circuit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59195846U (en) * 1983-06-10 1984-12-26 三洋電機株式会社 Input circuit of frequency divider circuit
JPS59195845U (en) * 1983-06-10 1984-12-26 三洋電機株式会社 Input circuit of frequency divider circuit
JPH0438606Y2 (en) * 1983-06-10 1992-09-09
JPH0445305Y2 (en) * 1983-06-10 1992-10-26
JPS60244123A (en) * 1984-05-18 1985-12-04 Fujitsu Ltd Cmos master slice semiconductor device
JPH025168A (en) * 1988-06-22 1990-01-10 Nec Ic Microcomput Syst Ltd Microcomputer
JPH021085A (en) * 1989-02-10 1990-01-05 Hitachi Ltd Data input device
JPH0525840U (en) * 1991-09-12 1993-04-02 日本電気株式会社 Input circuit of integrated circuit

Also Published As

Publication number Publication date
JPH0257377B2 (en) 1990-12-04

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