JPS6477242A - Clock control system - Google Patents

Clock control system

Info

Publication number
JPS6477242A
JPS6477242A JP63147226A JP14722688A JPS6477242A JP S6477242 A JPS6477242 A JP S6477242A JP 63147226 A JP63147226 A JP 63147226A JP 14722688 A JP14722688 A JP 14722688A JP S6477242 A JPS6477242 A JP S6477242A
Authority
JP
Japan
Prior art keywords
clock
switching
line
supply device
processor
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
JP63147226A
Other languages
Japanese (ja)
Other versions
JPH0797771B2 (en
Inventor
Takashi Suzuki
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP63147226A priority Critical patent/JPH0797771B2/en
Publication of JPS6477242A publication Critical patent/JPS6477242A/en
Publication of JPH0797771B2 publication Critical patent/JPH0797771B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/56—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds
    • C07C45/57—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds with oxygen as the only heteroatom
    • C07C45/59—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds with oxygen as the only heteroatom in five-membered rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Small-Scale Networks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To improve the operation efficiency by controlling clock supply by switching of a supply clock to another or the like. CONSTITUTION:The clock switching indication signal from a clock switching part 103 of an information processor 1 is sent to a line 303, and a clock switching validating signal of the processor itself is generated and is supplied to a clock supply device 10 through a line 306. The clock is switched by a clock control part 101. A clock control part 201 invalidates the clock switching indication signal by NOT given through a line 301. In this state, clock cycles of processors 1 and 2 are changed together. Thus, the clock of the clock supply device 10 which is supplied at present is switched to another clock when the information processor 2 receives the clock from the clock supply device 10 to which the processor 2 does not correspond.
JP63147226A 1987-06-25 1988-06-14 Clock control system Expired - Fee Related JPH0797771B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63147226A JPH0797771B2 (en) 1987-06-25 1988-06-14 Clock control system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP62-156492 1987-06-25
JP15649287 1987-06-25
JP63147226A JPH0797771B2 (en) 1987-06-25 1988-06-14 Clock control system

Publications (2)

Publication Number Publication Date
JPS6477242A true JPS6477242A (en) 1989-03-23
JPH0797771B2 JPH0797771B2 (en) 1995-10-18

Family

ID=26477835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63147226A Expired - Fee Related JPH0797771B2 (en) 1987-06-25 1988-06-14 Clock control system

Country Status (1)

Country Link
JP (1) JPH0797771B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133742A (en) * 1981-02-13 1982-08-18 Nec Corp Communication controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133742A (en) * 1981-02-13 1982-08-18 Nec Corp Communication controller

Also Published As

Publication number Publication date
JPH0797771B2 (en) 1995-10-18

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees