JPS6433637A - Test facilitating circuit - Google Patents

Test facilitating circuit

Info

Publication number
JPS6433637A
JPS6433637A JP62190878A JP19087887A JPS6433637A JP S6433637 A JPS6433637 A JP S6433637A JP 62190878 A JP62190878 A JP 62190878A JP 19087887 A JP19087887 A JP 19087887A JP S6433637 A JPS6433637 A JP S6433637A
Authority
JP
Japan
Prior art keywords
cells
time
test
macrocells
selector
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
JP62190878A
Other languages
Japanese (ja)
Inventor
Makoto Ozaki
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP62190878A priority Critical patent/JPS6433637A/en
Publication of JPS6433637A publication Critical patent/JPS6433637A/en
Pending legal-status Critical Current

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  • Test And Diagnosis Of Digital Computers (AREA)

Abstract

PURPOSE:To shorten the test time by carrying out plural tests at one time in case plural macrocells of the same function are included in a system LSI. CONSTITUTION:A test mode signal 18 is turned on and both macrocells 13 and 14 are set in a state where they are tested at one time. The inputs received via input terminals A-C are multi-driven by a 2nd selector 17 and the outputs of cells 13 and 14 are equal to each other as long as the functions of both cells are normal. The outputs of both cells 13 and 14 are detected through gates 19 and 20 and taken outside via the selector 17. Thus the simultaneous trouble checking is possible for both cells 13 and 14 just with execution of a single test sequence of both cells. As a result, the test time is reduced.
JP62190878A 1987-07-30 1987-07-30 Test facilitating circuit Pending JPS6433637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62190878A JPS6433637A (en) 1987-07-30 1987-07-30 Test facilitating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62190878A JPS6433637A (en) 1987-07-30 1987-07-30 Test facilitating circuit

Publications (1)

Publication Number Publication Date
JPS6433637A true JPS6433637A (en) 1989-02-03

Family

ID=16265253

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62190878A Pending JPS6433637A (en) 1987-07-30 1987-07-30 Test facilitating circuit

Country Status (1)

Country Link
JP (1) JPS6433637A (en)

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