JPS641040A - Microcomputer incorporating test circuit - Google Patents
Microcomputer incorporating test circuitInfo
- Publication number
- JPS641040A JPS641040A JP62157106A JP15710687A JPS641040A JP S641040 A JPS641040 A JP S641040A JP 62157106 A JP62157106 A JP 62157106A JP 15710687 A JP15710687 A JP 15710687A JP S641040 A JPS641040 A JP S641040A
- Authority
- JP
- Japan
- Prior art keywords
- test
- write
- data
- instruction data
- inputted
- 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
- Microcomputers (AREA)
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
PURPOSE: To perform the independent operation test of a microcomputer by providing a semiconductor chip with an external terminal, through which instruction data for test is inputted from the external, and a control circuit which writes instruction data in a write/read-only storage circuit.
CONSTITUTION: A semiconductor chip 11 is provided with a central operation processing circuit 12 which processes data, a write/read-only storage circuit 13, a control circuit 14 which controls the write processing of instruction data 16 for test, and an external terminal 15 through which data 16 is inputted. Thus, instruction data 16 for test is inputted from the external terminal 15 to rewrite data 16 in the write/read-only storage circuit 14 through the control circuit 14 at any time, and the independent operation test of the highly functional microcomputer is performed without extending test circuits.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-157106A JPH011040A (en) | 1987-06-24 | Microcomputer with built-in test circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-157106A JPH011040A (en) | 1987-06-24 | Microcomputer with built-in test circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS641040A true JPS641040A (en) | 1989-01-05 |
JPH011040A JPH011040A (en) | 1989-01-05 |
Family
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