JPS5692632A - Keyboard control system - Google Patents

Keyboard control system

Info

Publication number
JPS5692632A
JPS5692632A JP16976879A JP16976879A JPS5692632A JP S5692632 A JPS5692632 A JP S5692632A JP 16976879 A JP16976879 A JP 16976879A JP 16976879 A JP16976879 A JP 16976879A JP S5692632 A JPS5692632 A JP S5692632A
Authority
JP
Japan
Prior art keywords
repeat
read
signal
keyboard
line
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
JP16976879A
Other languages
Japanese (ja)
Inventor
Takatoshi Enozono
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16976879A priority Critical patent/JPS5692632A/en
Publication of JPS5692632A publication Critical patent/JPS5692632A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the overhead in software formation, by providing the line buffer LB at the keyboard scan-return side and controlling the buffer output every time when the repeat signal is received.
CONSTITUTION: When a repeat key switch is depressed on a keyboard unit 3, an arbitrary repeat cycle signal is made at a repeat control circuit 4 and it is input to LB5. LB5 inhibits the return line 15 when a significant signal is fed to a signal line 18, the output of LB5 is all made "High", and the return line 19 is made to "High". The keyboard control LSI1 does not read in twice, even if depression is continuously made after the data is once read in, but when the return line 19 is once made to H level, the LSI1 makes enable/desirable control so that the key switch is again read in. Thus, in synchronizing with the repeat cycle, the key code on the unit 3 can be read in and the program of data readout routine can be simplified.
COPYRIGHT: (C)1981,JPO&Japio
JP16976879A 1979-12-26 1979-12-26 Keyboard control system Pending JPS5692632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16976879A JPS5692632A (en) 1979-12-26 1979-12-26 Keyboard control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16976879A JPS5692632A (en) 1979-12-26 1979-12-26 Keyboard control system

Publications (1)

Publication Number Publication Date
JPS5692632A true JPS5692632A (en) 1981-07-27

Family

ID=15892489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16976879A Pending JPS5692632A (en) 1979-12-26 1979-12-26 Keyboard control system

Country Status (1)

Country Link
JP (1) JPS5692632A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62271117A (en) * 1986-05-20 1987-11-25 Sanyo Electric Co Ltd Key input device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62271117A (en) * 1986-05-20 1987-11-25 Sanyo Electric Co Ltd Key input device
JPH0750423B2 (en) * 1986-05-20 1995-05-31 三洋電機株式会社 Key input device

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