JPS556616A - Switch information reader circuit - Google Patents

Switch information reader circuit

Info

Publication number
JPS556616A
JPS556616A JP7863578A JP7863578A JPS556616A JP S556616 A JPS556616 A JP S556616A JP 7863578 A JP7863578 A JP 7863578A JP 7863578 A JP7863578 A JP 7863578A JP S556616 A JPS556616 A JP S556616A
Authority
JP
Japan
Prior art keywords
switch
information
microcomputer
read
function
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
JP7863578A
Other languages
Japanese (ja)
Inventor
Masamitsu Miyazaki
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.)
Kokusai Denki Electric Inc
Original Assignee
Hitachi Denshi KK
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 Denshi KK filed Critical Hitachi Denshi KK
Priority to JP7863578A priority Critical patent/JPS556616A/en
Publication of JPS556616A publication Critical patent/JPS556616A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To obtain a simple and convenient switch scanning system which does not interrupt a microcomputer when reading switch information.
CONSTITUTION: Through the scan of switch scanning circuit 1, switch 3 is read by switch information reader circuit 2. According to the program of the microcomputer, D filp-flop 6 is set by making a random contact of switch 3 with a status function and feature function, so that its output B will change into H. Outputs S and F of scanning circuit 1 expresses scans of a status and function. When the scan output is outputted to switch 3, the switch make is detected and after delay time (a) equivalent to the chattering time, scanning circuit 1 outputs scan signal 2 to switch 3 again to read out information. The microcomputer obtains the logical sum between switch-on information and read informatio after the delay time and then reads the ON operation of switch 3.
COPYRIGHT: (C)1980,JPO&Japio
JP7863578A 1978-06-30 1978-06-30 Switch information reader circuit Pending JPS556616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7863578A JPS556616A (en) 1978-06-30 1978-06-30 Switch information reader circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7863578A JPS556616A (en) 1978-06-30 1978-06-30 Switch information reader circuit

Publications (1)

Publication Number Publication Date
JPS556616A true JPS556616A (en) 1980-01-18

Family

ID=13667321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7863578A Pending JPS556616A (en) 1978-06-30 1978-06-30 Switch information reader circuit

Country Status (1)

Country Link
JP (1) JPS556616A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62256320A (en) * 1986-04-30 1987-11-09 パイオニア株式会社 Apparatus for preventing on/off key switch from misoperation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49113530A (en) * 1973-02-26 1974-10-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49113530A (en) * 1973-02-26 1974-10-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62256320A (en) * 1986-04-30 1987-11-09 パイオニア株式会社 Apparatus for preventing on/off key switch from misoperation

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