JPS55153039A - Microcomputer input circuit - Google Patents
Microcomputer input circuitInfo
- Publication number
- JPS55153039A JPS55153039A JP6042879A JP6042879A JPS55153039A JP S55153039 A JPS55153039 A JP S55153039A JP 6042879 A JP6042879 A JP 6042879A JP 6042879 A JP6042879 A JP 6042879A JP S55153039 A JPS55153039 A JP S55153039A
- Authority
- JP
- Japan
- Prior art keywords
- program
- input circuit
- input
- diodes
- making
- 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
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Input From Keyboards Or The Like (AREA)
- Executing Machine-Instructions (AREA)
- Microcomputers (AREA)
Abstract
PURPOSE: To make it possible to modify the specification of a program easily without increasing input circuits, by making it possible to alter the following execution on the basis of the state of an input circuit in electric power feed or reset operation.
CONSTITUTION: A radio set using a PLL synthesizer employs one-chip CPU for control. The trouble of a diversity in specification such as a frequency band is obviated by making it possible to select a program. To obtain data for selecting or modifying the program, diodes 33W36 are connected to input circuits 16W19. In power feed or reset operation, terminal 32 is held at "H" for a certain time. As a result, "H" is input to terminals 16W19 to which diodes are connected. Then, four- bit data at that time are written in a fixed register and then used for the selection of the program and modification in execution.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6042879A JPS55153039A (en) | 1979-05-18 | 1979-05-18 | Microcomputer input circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6042879A JPS55153039A (en) | 1979-05-18 | 1979-05-18 | Microcomputer input circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55153039A true JPS55153039A (en) | 1980-11-28 |
JPS6148729B2 JPS6148729B2 (en) | 1986-10-25 |
Family
ID=13141942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6042879A Granted JPS55153039A (en) | 1979-05-18 | 1979-05-18 | Microcomputer input circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55153039A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56119596A (en) * | 1980-02-26 | 1981-09-19 | Nec Corp | Control signal generator |
JPS5792994A (en) * | 1980-11-28 | 1982-06-09 | Nec Corp | Transmitting device |
JPS57157834U (en) * | 1981-03-30 | 1982-10-04 | ||
JPS58195926A (en) * | 1982-05-11 | 1983-11-15 | Fujitsu Ltd | Keyboard encoder |
JPS6151225A (en) * | 1984-08-18 | 1986-03-13 | Panafacom Ltd | Keyboard device |
JPS6219934A (en) * | 1985-07-17 | 1987-01-28 | Sharp Corp | Integrated circuit device |
JPS62102625A (en) * | 1985-10-29 | 1987-05-13 | Matsushita Electric Ind Co Ltd | Digital-analog converting circuit |
-
1979
- 1979-05-18 JP JP6042879A patent/JPS55153039A/en active Granted
Non-Patent Citations (1)
Title |
---|
NATIONAL TECHNICAL REPORT=1977 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56119596A (en) * | 1980-02-26 | 1981-09-19 | Nec Corp | Control signal generator |
JPS6347038B2 (en) * | 1980-02-26 | 1988-09-20 | Nippon Electric Co | |
JPS5792994A (en) * | 1980-11-28 | 1982-06-09 | Nec Corp | Transmitting device |
JPH0156597B2 (en) * | 1980-11-28 | 1989-11-30 | Nippon Denki Kk | |
JPS57157834U (en) * | 1981-03-30 | 1982-10-04 | ||
JPH0134034Y2 (en) * | 1981-03-30 | 1989-10-17 | ||
JPS58195926A (en) * | 1982-05-11 | 1983-11-15 | Fujitsu Ltd | Keyboard encoder |
JPS6151225A (en) * | 1984-08-18 | 1986-03-13 | Panafacom Ltd | Keyboard device |
JPS6219934A (en) * | 1985-07-17 | 1987-01-28 | Sharp Corp | Integrated circuit device |
JPS62102625A (en) * | 1985-10-29 | 1987-05-13 | Matsushita Electric Ind Co Ltd | Digital-analog converting circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6148729B2 (en) | 1986-10-25 |
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