JPS6415834A - Microcomputer - Google Patents
MicrocomputerInfo
- Publication number
- JPS6415834A JPS6415834A JP62172187A JP17218787A JPS6415834A JP S6415834 A JPS6415834 A JP S6415834A JP 62172187 A JP62172187 A JP 62172187A JP 17218787 A JP17218787 A JP 17218787A JP S6415834 A JPS6415834 A JP S6415834A
- Authority
- JP
- Japan
- Prior art keywords
- block
- output
- input
- circuit
- 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 realize execution of various action tests by controlling the selectors set among the function circuit blocks to separate these function blocks from a microcomputer and connecting them to an external circuit to perform the tests for each block. CONSTITUTION:In an action test mode of a function circuit block 12, the selector control signals 52 and 72 are set at 0 and the input 92 of the block 12 is separated from the output 101 of a block 11 and connected to the output of an input/ output circuit 4 via a selector 22. Then the output 102 of the block 12 is separated from the input 93 of the block 13 and connected to the input of the circuit 4 via an output selector 32. As a result, an external input signal 62 is supplied to the block 12 from the outside of a microcomputer via an input/output terminal 12, the circuit 4 and an input selector 22 respectively. The result processed by the block 12 is delivered via the selector 32, the circuit 4 and the terminal 12. Thus the action of the block 12 is confirmed according to the coincidence or discordance secured between the output signal and the estimated output of the block 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62172187A JPS6415834A (en) | 1987-07-10 | 1987-07-10 | Microcomputer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62172187A JPS6415834A (en) | 1987-07-10 | 1987-07-10 | Microcomputer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6415834A true JPS6415834A (en) | 1989-01-19 |
Family
ID=15937189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62172187A Pending JPS6415834A (en) | 1987-07-10 | 1987-07-10 | Microcomputer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6415834A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS569848A (en) * | 1979-07-03 | 1981-01-31 | Nec Corp | Automatic test logic unit |
JPS60242380A (en) * | 1984-05-16 | 1985-12-02 | Hitachi Ltd | Facilitating circuit for fault diagnosis of integrated circuit |
JPS6238949A (en) * | 1985-08-14 | 1987-02-19 | Mitsubishi Electric Corp | Semiconductor integrated circuit |
-
1987
- 1987-07-10 JP JP62172187A patent/JPS6415834A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS569848A (en) * | 1979-07-03 | 1981-01-31 | Nec Corp | Automatic test logic unit |
JPS60242380A (en) * | 1984-05-16 | 1985-12-02 | Hitachi Ltd | Facilitating circuit for fault diagnosis of integrated circuit |
JPS6238949A (en) * | 1985-08-14 | 1987-02-19 | Mitsubishi Electric Corp | Semiconductor integrated circuit |
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