JPS5379437A - Key signal read-in system - Google Patents
Key signal read-in systemInfo
- Publication number
- JPS5379437A JPS5379437A JP15578176A JP15578176A JPS5379437A JP S5379437 A JPS5379437 A JP S5379437A JP 15578176 A JP15578176 A JP 15578176A JP 15578176 A JP15578176 A JP 15578176A JP S5379437 A JPS5379437 A JP S5379437A
- Authority
- JP
- Japan
- Prior art keywords
- key signal
- signal read
- integrated circuit
- segment
- delivers
- 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
Abstract
PURPOSE: To reduce the number of the input/output pin of an integrated circuit by blocking temporarily the segment decoding output within the integrated circuit and providing a gate circuit which delivers the segment signal line digit signal for display.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15578176A JPS5379437A (en) | 1976-12-24 | 1976-12-24 | Key signal read-in system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15578176A JPS5379437A (en) | 1976-12-24 | 1976-12-24 | Key signal read-in system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5379437A true JPS5379437A (en) | 1978-07-13 |
JPS5545931B2 JPS5545931B2 (en) | 1980-11-20 |
Family
ID=15613260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15578176A Granted JPS5379437A (en) | 1976-12-24 | 1976-12-24 | Key signal read-in system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5379437A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51114023A (en) * | 1975-03-31 | 1976-10-07 | Sharp Corp | A control unit for in and output signals |
JPS51127621A (en) * | 1975-04-28 | 1976-11-06 | Toshiba Corp | Data input unit |
JPS522327A (en) * | 1975-06-23 | 1977-01-10 | Rockwell International Corp | Device for driving switch means |
-
1976
- 1976-12-24 JP JP15578176A patent/JPS5379437A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51114023A (en) * | 1975-03-31 | 1976-10-07 | Sharp Corp | A control unit for in and output signals |
JPS51127621A (en) * | 1975-04-28 | 1976-11-06 | Toshiba Corp | Data input unit |
JPS522327A (en) * | 1975-06-23 | 1977-01-10 | Rockwell International Corp | Device for driving switch means |
Also Published As
Publication number | Publication date |
---|---|
JPS5545931B2 (en) | 1980-11-20 |
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