JPS54121026A - Input control system - Google Patents

Input control system

Info

Publication number
JPS54121026A
JPS54121026A JP2846278A JP2846278A JPS54121026A JP S54121026 A JPS54121026 A JP S54121026A JP 2846278 A JP2846278 A JP 2846278A JP 2846278 A JP2846278 A JP 2846278A JP S54121026 A JPS54121026 A JP S54121026A
Authority
JP
Japan
Prior art keywords
key
memory
scanner
signal
address
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
JP2846278A
Other languages
Japanese (ja)
Other versions
JPS6253851B2 (en
Inventor
Akira Kuroki
Yoshihiro Nagano
Hideo Tsuboi
Hiroyuki Yamamoto
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP53028462A priority Critical patent/JPS6253851B2/ja
Publication of JPS54121026A publication Critical patent/JPS54121026A/en
Publication of JPS6253851B2 publication Critical patent/JPS6253851B2/ja
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To secure the fault detection and the N-key rollover control by providing the means to scan the plural input keys and then to deliver the key data of the pushed key plus the memory possessing the addresses corresponding to each of the input keys.
CONSTITUTION: Memory 3 possesses the addresses corresponding to each of the input keys of key matrix KM4. Scanner 2 in control circuit 1 scans both KM4 and memory 3 simultaneously. With push of a certain key A, the address signals are delivered sequentially from scanner 2. And when a coincidence is obtained between the address signal and the key A, signal KD is transmitted from KM4 to circuit 1. The KD signal features 1 when the key is pushed and 0 with no push of the key and thus identifies the pushed key via scanner 2. After confirmation of push of key A at crcuit 1, the key data is sent outside and signal 1 is written into the address of key A of memory 3. Scanner 2 continues scanning, and the sending of the key data to outside is inhibited at the address where the output of memory 3 is 1. Thus, the data can be sent out with no error.
COPYRIGHT: (C)1979,JPO&Japio
JP53028462A 1978-03-13 1978-03-13 Expired JPS6253851B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53028462A JPS6253851B2 (en) 1978-03-13 1978-03-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53028462A JPS6253851B2 (en) 1978-03-13 1978-03-13

Publications (2)

Publication Number Publication Date
JPS54121026A true JPS54121026A (en) 1979-09-19
JPS6253851B2 JPS6253851B2 (en) 1987-11-12

Family

ID=12249316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53028462A Expired JPS6253851B2 (en) 1978-03-13 1978-03-13

Country Status (1)

Country Link
JP (1) JPS6253851B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5776626A (en) * 1980-10-31 1982-05-13 Canon Inc Key input equipment
US4420744A (en) * 1981-02-12 1983-12-13 Oak Industries Inc. Keyboard crosspoint encoder having N-key rollover
JPS6132127A (en) * 1984-07-24 1986-02-14 Alps Electric Co Ltd Key output system of keyboard

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01157664A (en) * 1987-12-15 1989-06-20 Matsushita Electric Works Ltd Terminal equipment for remote control system with telephone line

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49107627A (en) * 1973-02-05 1974-10-12
JPS49113530A (en) * 1973-02-26 1974-10-30

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49107627A (en) * 1973-02-05 1974-10-12
JPS49113530A (en) * 1973-02-26 1974-10-30

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5776626A (en) * 1980-10-31 1982-05-13 Canon Inc Key input equipment
US4420744A (en) * 1981-02-12 1983-12-13 Oak Industries Inc. Keyboard crosspoint encoder having N-key rollover
JPS6132127A (en) * 1984-07-24 1986-02-14 Alps Electric Co Ltd Key output system of keyboard
JPH051485B2 (en) * 1984-07-24 1993-01-08 Alps Electric Co Ltd

Also Published As

Publication number Publication date
JPS6253851B2 (en) 1987-11-12

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