JPS5685162A - Data input circuit - Google Patents
Data input circuitInfo
- Publication number
- JPS5685162A JPS5685162A JP16301479A JP16301479A JPS5685162A JP S5685162 A JPS5685162 A JP S5685162A JP 16301479 A JP16301479 A JP 16301479A JP 16301479 A JP16301479 A JP 16301479A JP S5685162 A JPS5685162 A JP S5685162A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- gate
- data processor
- error
- turns
- 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
Abstract
PURPOSE: To prevent reading of an ineffective data for a data processor, by sending an address answer signal back to a data processor after receiving an address signal delivered from the data processor and checking an error of the data.
CONSTITUTION: When the gate signal G1 becomes e.g. "1", the signal S1 is turned into the signal D on the common bus 2a via the input gate circuit 1-1 to be then delivered to the process input 3 as well as to the error check circuit 8 for checking. As a result, the signal 8a is turned into "1" in case the signal D contains no error and then into "0" in case the signal D contains some error respectively. On the other hand, the reception detecting circuit 7-1 receives the gate signal D and then turns it into "1". Thus the AND gate 9 turns the output into "1" if the signal 8a is turned to "1" at that moment. Accordingly, the data processor 2 reads the signal D on the common bus as an effective one only when the output of the gate 9 turns to "1" after an output of the address signal.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16301479A JPS5685162A (en) | 1979-12-12 | 1979-12-12 | Data input circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16301479A JPS5685162A (en) | 1979-12-12 | 1979-12-12 | Data input circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5685162A true JPS5685162A (en) | 1981-07-11 |
Family
ID=15765548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16301479A Pending JPS5685162A (en) | 1979-12-12 | 1979-12-12 | Data input circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5685162A (en) |
-
1979
- 1979-12-12 JP JP16301479A patent/JPS5685162A/en active Pending
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