JPS55153039A - Microcomputer input circuit - Google Patents

Microcomputer input circuit

Info

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
Application number
JP6042879A
Other languages
Japanese (ja)
Other versions
JPS6148729B2 (en
Inventor
Toshifumi Shibuya
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6042879A priority Critical patent/JPS55153039A/en
Publication of JPS55153039A publication Critical patent/JPS55153039A/en
Publication of JPS6148729B2 publication Critical patent/JPS6148729B2/ja
Granted legal-status Critical Current

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
JP6042879A 1979-05-18 1979-05-18 Microcomputer input circuit Granted JPS55153039A (en)

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)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NATIONAL TECHNICAL REPORT=1977 *

Cited By (10)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JPS5671878A (en) Semiconductor memory device
JPS5236420A (en) Integrated circuit device for tv with memory
JPS55153039A (en) Microcomputer input circuit
JPS5667779A (en) Crystal watch
JPS5384634A (en) Ic memory unit device
JPS5344135A (en) Function test equipment for logical operation circuit
JPS5588102A (en) Sequence programmer
JPS56169432A (en) Frequency dividing ratio setting circuit for programmable counter
JPS53131702A (en) Electronic tuning device
JPS5342659A (en) Semiconductor integrated circuit
JPS5247682A (en) Integrated circuit
JPS5414647A (en) Signal processor
JPS5344783A (en) Sequence controlling device
JPS5463633A (en) Semiconductor integrated circuit
JPS54149438A (en) Sequence control circuit
JPS5588103A (en) Sequence programmer
JPS53133357A (en) Electron selection switch circuit
JPS52155576A (en) Input control circuit
JPS52106230A (en) Phase control circuit
JPS5245859A (en) Input circuit
JPS55135961A (en) Micro-computer
JPS573414A (en) Meter driving circuit
JPS52113259A (en) Testing mechanism for electronic clock
JPS5288325A (en) Electronic musical instrument
JPS5346059A (en) Electronic circuit for watches