JPS5616225A - Input selection circuit for microcomputer - Google Patents

Input selection circuit for microcomputer

Info

Publication number
JPS5616225A
JPS5616225A JP9123679A JP9123679A JPS5616225A JP S5616225 A JPS5616225 A JP S5616225A JP 9123679 A JP9123679 A JP 9123679A JP 9123679 A JP9123679 A JP 9123679A JP S5616225 A JPS5616225 A JP S5616225A
Authority
JP
Japan
Prior art keywords
terminal
input
microcomputer
computer
register
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
Application number
JP9123679A
Other languages
Japanese (ja)
Inventor
Kosaku Uota
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9123679A priority Critical patent/JPS5616225A/en
Publication of JPS5616225A publication Critical patent/JPS5616225A/en
Pending legal-status Critical Current

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  • Microcomputers (AREA)

Abstract

PURPOSE: To enable to extend the selective processing easily, when the number of input points of microcomputer is deficient, by inputting the selection signals up to four to one input terminal.
CONSTITUTION: Four external switching input terminals (a), (b), (c) and (d) are provided for the input terminal I of the microcomputer 100, so that the selective connection with the terminal (e) at the terminal I side can be made. Further, the terminal (a) is grounded, and the terminal (b) is connected to the positive power supply terminal P of the computer 100. On the other hand, the terminal (c) is connected to the output terminal O of the computer 100 via the inverter 101, and the terminal (d) is connected directly to the terminal O. The content of the terminal I is stored in the register R1 when the output register RS is at H and at L, in the register R2. Four types of input selections can be made by the connection of the terminal (e) to any of the terminals a...d. Thus, even if the number of input points is deficient for the computer, the extension of selective processing can easily be made.
COPYRIGHT: (C)1981,JPO&Japio
JP9123679A 1979-07-17 1979-07-17 Input selection circuit for microcomputer Pending JPS5616225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9123679A JPS5616225A (en) 1979-07-17 1979-07-17 Input selection circuit for microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9123679A JPS5616225A (en) 1979-07-17 1979-07-17 Input selection circuit for microcomputer

Publications (1)

Publication Number Publication Date
JPS5616225A true JPS5616225A (en) 1981-02-17

Family

ID=14020777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9123679A Pending JPS5616225A (en) 1979-07-17 1979-07-17 Input selection circuit for microcomputer

Country Status (1)

Country Link
JP (1) JPS5616225A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS628195A (en) * 1985-07-05 1987-01-16 日本電気株式会社 Microcomputer with built-in liquid crystal driving circuit
JPS62192802A (en) * 1986-02-20 1987-08-24 Brother Ind Ltd Central processing control circuit provided with plural control program data
JP2011007292A (en) * 2009-06-26 2011-01-13 Kawashima Nogu Seisakusho:Kk High-lift working machine for agriculture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS628195A (en) * 1985-07-05 1987-01-16 日本電気株式会社 Microcomputer with built-in liquid crystal driving circuit
JPS62192802A (en) * 1986-02-20 1987-08-24 Brother Ind Ltd Central processing control circuit provided with plural control program data
JP2011007292A (en) * 2009-06-26 2011-01-13 Kawashima Nogu Seisakusho:Kk High-lift working machine for agriculture

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