JPS5556227A - Control signal generator by key input - Google Patents
Control signal generator by key inputInfo
- Publication number
- JPS5556227A JPS5556227A JP12971578A JP12971578A JPS5556227A JP S5556227 A JPS5556227 A JP S5556227A JP 12971578 A JP12971578 A JP 12971578A JP 12971578 A JP12971578 A JP 12971578A JP S5556227 A JPS5556227 A JP S5556227A
- Authority
- JP
- Japan
- Prior art keywords
- control signal
- contact
- signal generator
- key
- constitution
- 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.)
- Granted
Links
Landscapes
- Input From Keyboards Or The Like (AREA)
Abstract
PURPOSE: To realize a key-input control signal generator whose connection terminals required can be reduced in number even if the number of key switches in IC-constitution is increased.
CONSTITUTION: When key switch S1 is turned ON in a mode where mode signal Pm is made into "1" by placing mode change-over switch SW1 at a contact-(t6) side and input scan signals P1 and P2 are "1" and "0" respectively, output scan signal P3 becomes "1" by passing through 1st contact (a1), short bar (c1) and 2nd contact (b1) of S1; in this state, changes of input scan signals stop and while S1 is being depressed, control signal R1 appears at output terminal (t8). Other combinations are shown in the 1st table. Further, the 2nd table shows relations between S11W S14 and various signals with SW1 put at a (t5) side. In this way, control signals corresponding to several key switches can be genrated and the number of connection terminals in case of IC-implementation can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12971578A JPS5556227A (en) | 1978-10-20 | 1978-10-20 | Control signal generator by key input |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12971578A JPS5556227A (en) | 1978-10-20 | 1978-10-20 | Control signal generator by key input |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5556227A true JPS5556227A (en) | 1980-04-24 |
JPS6118773B2 JPS6118773B2 (en) | 1986-05-14 |
Family
ID=15016410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12971578A Granted JPS5556227A (en) | 1978-10-20 | 1978-10-20 | Control signal generator by key input |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5556227A (en) |
-
1978
- 1978-10-20 JP JP12971578A patent/JPS5556227A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6118773B2 (en) | 1986-05-14 |
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