JPS56159738A - Microprogram control circuit - Google Patents

Microprogram control circuit

Info

Publication number
JPS56159738A
JPS56159738A JP6253280A JP6253280A JPS56159738A JP S56159738 A JPS56159738 A JP S56159738A JP 6253280 A JP6253280 A JP 6253280A JP 6253280 A JP6253280 A JP 6253280A JP S56159738 A JPS56159738 A JP S56159738A
Authority
JP
Japan
Prior art keywords
circuit
clock
supply
signal
control
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
JP6253280A
Other languages
Japanese (ja)
Other versions
JPS6223893B2 (en
Inventor
Yoichi Wakai
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP6253280A priority Critical patent/JPS56159738A/en
Priority to GB8110281A priority patent/GB2075729B/en
Priority to US06/262,358 priority patent/US4408328A/en
Priority to CH307881A priority patent/CH644462A5/en
Publication of JPS56159738A publication Critical patent/JPS56159738A/en
Priority to HK731/86A priority patent/HK73186A/en
Publication of JPS6223893B2 publication Critical patent/JPS6223893B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/22—Microcontrol or microprogram arrangements
    • G06F9/26—Address formation of the next micro-instruction ; Microprogram storage or retrieval arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)
  • Calculators And Similar Devices (AREA)

Abstract

PURPOSE:To bring a program forcibly back to the initial state by starting the supply of a clock with a state signal, such as an external trigger signal, while inhibiting the supply of an operation clock by judging a runaway of a circuit system through a control circuit when the circuit system continues to operate for a given period of time or longer. CONSTITUTION:A clock signal operating various electronic circuits is generated by an oscillator and frequency divider 301 and the clock is supplied to a main circuit 302. This circuit 302 is provided with an ROM304 stored with various microinstructions and an RAM307 stored with various data. Further, a timer circuit 334 is provided which receives outputs from a timer 315, an input port 314 and a frequency divider 301. This circuit 334 is provided with logical circuits, such as an OR gate 318 and a latch 319, which control the start and stop of a system. The circuit system, when operating for a given period of time or longer, is considered to be bloyond control; the supply of an operation clock is inhibited and the supply of the clock is restarted with the start signal of the port 314, etc., to bring a program back to the initial state.
JP6253280A 1980-05-12 1980-05-12 Microprogram control circuit Granted JPS56159738A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP6253280A JPS56159738A (en) 1980-05-12 1980-05-12 Microprogram control circuit
GB8110281A GB2075729B (en) 1980-05-12 1981-04-01 Microprogramm control circuit
US06/262,358 US4408328A (en) 1980-05-12 1981-05-11 Microprogram control circuit
CH307881A CH644462A5 (en) 1980-05-12 1981-05-12 CIRCUITRY FOR THE EXECUTION OF A MICRO-PROGRAM.
HK731/86A HK73186A (en) 1980-05-12 1986-10-02 Microprogram control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6253280A JPS56159738A (en) 1980-05-12 1980-05-12 Microprogram control circuit

Publications (2)

Publication Number Publication Date
JPS56159738A true JPS56159738A (en) 1981-12-09
JPS6223893B2 JPS6223893B2 (en) 1987-05-26

Family

ID=13202901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6253280A Granted JPS56159738A (en) 1980-05-12 1980-05-12 Microprogram control circuit

Country Status (1)

Country Link
JP (1) JPS56159738A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50109642A (en) * 1974-02-04 1975-08-28
JPS5242040A (en) * 1975-09-29 1977-04-01 Hitachi Ltd Microprogram control unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50109642A (en) * 1974-02-04 1975-08-28
JPS5242040A (en) * 1975-09-29 1977-04-01 Hitachi Ltd Microprogram control unit

Also Published As

Publication number Publication date
JPS6223893B2 (en) 1987-05-26

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