JPS6433637A - Test facilitating circuit - Google Patents
Test facilitating circuitInfo
- 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
Links
Landscapes
- 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.
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) |
-
1987
- 1987-07-30 JP JP62190878A patent/JPS6433637A/en active Pending
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