JPS5624633A - Key input control system - Google Patents

Key input control system

Info

Publication number
JPS5624633A
JPS5624633A JP9957079A JP9957079A JPS5624633A JP S5624633 A JPS5624633 A JP S5624633A JP 9957079 A JP9957079 A JP 9957079A JP 9957079 A JP9957079 A JP 9957079A JP S5624633 A JPS5624633 A JP S5624633A
Authority
JP
Japan
Prior art keywords
cpu13
key
circuit
output
transferred
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
JP9957079A
Other languages
Japanese (ja)
Inventor
Yukio Maehashi
Hiroshi Hikichi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9957079A priority Critical patent/JPS5624633A/en
Publication of JPS5624633A publication Critical patent/JPS5624633A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the chattering simply and effectively by forming the construction for indicating the input permission only when the key switch action detecting signal is not present and the key input information detecting signal is present.
CONSTITUTION: The output of OR circuit 2 (key switch action detection signal) is transferred to CPU13 practicing the control processing and predetermined operation in accordance with the key input information generated from the key device 1, and further the respective output of FF group 3 is transferred to OR circuit 4 and CPU13. CPU13 decodes the key input information of FF group 3 and practices based on the key function. In addition, the output of the circuit 4 (key input information detection signal) is also transferred to CPU13. Every time the timing signal 14 is transferred, CPU13 judge the input signals from the circuits 2 and 4 and operates the contents of the counter 15. For example, in the case where the output of the circuit 2 is "0", and the output of the circuit 4 is "1", the device portion 1 of the key is electrically separated, so that the CPU13 counts up the contents of the counter 15.
COPYRIGHT: (C)1981,JPO&Japio
JP9957079A 1979-08-03 1979-08-03 Key input control system Pending JPS5624633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9957079A JPS5624633A (en) 1979-08-03 1979-08-03 Key input control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9957079A JPS5624633A (en) 1979-08-03 1979-08-03 Key input control system

Publications (1)

Publication Number Publication Date
JPS5624633A true JPS5624633A (en) 1981-03-09

Family

ID=14250773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9957079A Pending JPS5624633A (en) 1979-08-03 1979-08-03 Key input control system

Country Status (1)

Country Link
JP (1) JPS5624633A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161921A (en) * 1981-03-31 1982-10-05 Fuji Electric Co Ltd Signal processing system
JPS58109918A (en) * 1981-12-23 1983-06-30 Hitachi Ltd Signal fetch device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478004A (en) * 1977-12-02 1979-06-21 Nippon Telegr & Teleph Corp <Ntt> Switch circuit of push-button dial telephone set

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478004A (en) * 1977-12-02 1979-06-21 Nippon Telegr & Teleph Corp <Ntt> Switch circuit of push-button dial telephone set

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161921A (en) * 1981-03-31 1982-10-05 Fuji Electric Co Ltd Signal processing system
JPS58109918A (en) * 1981-12-23 1983-06-30 Hitachi Ltd Signal fetch device

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