JPS55108037A - Prevention circuit for mis-interruption of serial transfer - Google Patents
Prevention circuit for mis-interruption of serial transferInfo
- Publication number
- JPS55108037A JPS55108037A JP1426879A JP1426879A JPS55108037A JP S55108037 A JPS55108037 A JP S55108037A JP 1426879 A JP1426879 A JP 1426879A JP 1426879 A JP1426879 A JP 1426879A JP S55108037 A JPS55108037 A JP S55108037A
- Authority
- JP
- Japan
- Prior art keywords
- error
- interruption
- bit
- mis
- data
- 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
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
PURPOSE: To prevent the occurrence of request interruption, when the selector switch of data transfer speed is set in error, by providing FF to detect whether or not the data bit after the start bit is all 0.
CONSTITUTION: It is assumed that the Baud rate switch of the typewriter 1 is set to low speed side in error and the character key is depressed. In this case, since the code making the position of the stop bit to 0 is present in the character code, framing error is outputted. But, if the bit in which the serial input SI data is changed from 0W1 before the STOP bit is present, leading signal is detected at the terminal T of FF22, request FF12 is set to 1, and the output at the terminal 0 is 0. Accordingly, the gate 11 keeps OFF, FF12 is not set. Thus, even with the operation in error, no mis-interruption is fed to the computer 3.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1426879A JPS55108037A (en) | 1979-02-13 | 1979-02-13 | Prevention circuit for mis-interruption of serial transfer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1426879A JPS55108037A (en) | 1979-02-13 | 1979-02-13 | Prevention circuit for mis-interruption of serial transfer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55108037A true JPS55108037A (en) | 1980-08-19 |
Family
ID=11856335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1426879A Pending JPS55108037A (en) | 1979-02-13 | 1979-02-13 | Prevention circuit for mis-interruption of serial transfer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55108037A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59170933A (en) * | 1983-03-17 | 1984-09-27 | Tokyo Electric Co Ltd | Input data control device of printer |
JPS60112477A (en) * | 1983-11-25 | 1985-06-18 | Tokyo Electric Co Ltd | Printer |
-
1979
- 1979-02-13 JP JP1426879A patent/JPS55108037A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59170933A (en) * | 1983-03-17 | 1984-09-27 | Tokyo Electric Co Ltd | Input data control device of printer |
JPH036532B2 (en) * | 1983-03-17 | 1991-01-30 | Tokyo Electric Co Ltd | |
JPS60112477A (en) * | 1983-11-25 | 1985-06-18 | Tokyo Electric Co Ltd | Printer |
JPH0351231B2 (en) * | 1983-11-25 | 1991-08-06 | Tokyo Electric Co Ltd |
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