JPS5597633A - Keyboard control circuit - Google Patents

Keyboard control circuit

Info

Publication number
JPS5597633A
JPS5597633A JP495479A JP495479A JPS5597633A JP S5597633 A JPS5597633 A JP S5597633A JP 495479 A JP495479 A JP 495479A JP 495479 A JP495479 A JP 495479A JP S5597633 A JPS5597633 A JP S5597633A
Authority
JP
Japan
Prior art keywords
circuit
mode
shift mode
keyboard
generation circuit
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
JP495479A
Other languages
Japanese (ja)
Inventor
Haruyuki Ando
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 JP495479A priority Critical patent/JPS5597633A/en
Publication of JPS5597633A publication Critical patent/JPS5597633A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enhance function of the keyboard by switching the output signals of the switch circuit to the prescribed shift mode while the state of the shift mode memory circuit being held.
CONSTITUTION: One side of the output signals of shift mode memory circuit 12 and mode signal generation circuit 13 is selected through switch circuit 15 and then delivered to code generation circuit 16. In this case, the mode indication signal of "1" or "0" is generated automatically through mode indication signal generation circuit 17. And the output signal of circuit 15 can be switched to the specified shift mode which is set previously. As a result, a series of complicated operation caused by the extension code operation can be reduced, thus enhancing the function of the keyboard.
COPYRIGHT: (C)1980,JPO&Japio
JP495479A 1979-01-18 1979-01-18 Keyboard control circuit Pending JPS5597633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP495479A JPS5597633A (en) 1979-01-18 1979-01-18 Keyboard control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP495479A JPS5597633A (en) 1979-01-18 1979-01-18 Keyboard control circuit

Publications (1)

Publication Number Publication Date
JPS5597633A true JPS5597633A (en) 1980-07-25

Family

ID=11597962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP495479A Pending JPS5597633A (en) 1979-01-18 1979-01-18 Keyboard control circuit

Country Status (1)

Country Link
JP (1) JPS5597633A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57114935A (en) * 1981-01-09 1982-07-17 Toshiba Corp Keyboard controller
JPS58103027A (en) * 1981-12-16 1983-06-18 Toshiba Corp Shift controller for key input prefetch
JPS60187946U (en) * 1984-05-24 1985-12-12 カシオ計算機株式会社 key input device
JPS61109745U (en) * 1984-12-21 1986-07-11

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57114935A (en) * 1981-01-09 1982-07-17 Toshiba Corp Keyboard controller
JPS58103027A (en) * 1981-12-16 1983-06-18 Toshiba Corp Shift controller for key input prefetch
JPH0312729B2 (en) * 1981-12-16 1991-02-20 Tokyo Shibaura Electric Co
JPS60187946U (en) * 1984-05-24 1985-12-12 カシオ計算機株式会社 key input device
JPS61109745U (en) * 1984-12-21 1986-07-11

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