JPS57154941A - Lsi converting system of logical circuit - Google Patents

Lsi converting system of logical circuit

Info

Publication number
JPS57154941A
JPS57154941A JP56040127A JP4012781A JPS57154941A JP S57154941 A JPS57154941 A JP S57154941A JP 56040127 A JP56040127 A JP 56040127A JP 4012781 A JP4012781 A JP 4012781A JP S57154941 A JPS57154941 A JP S57154941A
Authority
JP
Japan
Prior art keywords
logical circuit
lsi
macro
input
unused
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.)
Pending
Application number
JP56040127A
Other languages
Japanese (ja)
Inventor
Takuji Ogiwara
Shunichiro Nakamura
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56040127A priority Critical patent/JPS57154941A/en
Publication of JPS57154941A publication Critical patent/JPS57154941A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components

Abstract

PURPOSE:To convert a logical circuit into an LSI with the smallest number of elements, by setting ''1'' and ''0'' levels to the input and output terminals respectively along with an unused terminal when a logical circuit is designed with use of a general-purpose macro. CONSTITUTION:A logical circuit of LSI is first produced by using a general- purpose macro. In this case, ''1'' and ''0'' levels are written to the input and output terminals along with an unused terminal. Then undesired elements are removed. The backward tracing is carried out from an unused output terminal toward the input side of macro and along a signal line. After this, the signal level is held at the output side of macro, and at the same time the forward tracing is carried out from the ''0'' and ''1'' levels of the input side puls the unused input terminal to remove the undesired element and signals.
JP56040127A 1981-03-19 1981-03-19 Lsi converting system of logical circuit Pending JPS57154941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56040127A JPS57154941A (en) 1981-03-19 1981-03-19 Lsi converting system of logical circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56040127A JPS57154941A (en) 1981-03-19 1981-03-19 Lsi converting system of logical circuit

Publications (1)

Publication Number Publication Date
JPS57154941A true JPS57154941A (en) 1982-09-24

Family

ID=12572141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56040127A Pending JPS57154941A (en) 1981-03-19 1981-03-19 Lsi converting system of logical circuit

Country Status (1)

Country Link
JP (1) JPS57154941A (en)

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