JPH0295948U - - Google Patents
Info
- Publication number
- JPH0295948U JPH0295948U JP1989004797U JP479789U JPH0295948U JP H0295948 U JPH0295948 U JP H0295948U JP 1989004797 U JP1989004797 U JP 1989004797U JP 479789 U JP479789 U JP 479789U JP H0295948 U JPH0295948 U JP H0295948U
- Authority
- JP
- Japan
- Prior art keywords
- cpu
- circuit switch
- communication method
- control signal
- operating
- 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
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Computer And Data Communications (AREA)
- Communication Control (AREA)
Description
第１図はこの考案の一実施例による通信方法切
換装置を示す回路図、第２図は従来の通信システ
ムを示す回路図、第３図は従来の通信方法切換装
置を示す回路図である。
図において、６ａ，６ｂはＣＰＵ、７ａ，７ｂ
はラインレシーバ、８ａ，８ｂはラインドライバ
、２１ａ，２１ｂ，２２ａ，２２ｂはアナログス
イツチ、２３ａ，２３ｂは制御信号である。なお
、図中、同一符号は同一又は相当部分を示す。
FIG. 1 is a circuit diagram showing a communication method switching device according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing a conventional communication system, and FIG. 3 is a circuit diagram showing a conventional communication method switching device. In the figure, 6a, 6b are CPUs, 7a, 7b
is a line receiver, 8a and 8b are line drivers, 21a, 21b, 22a and 22b are analog switches, and 23a and 23b are control signals. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
構成されたシリアル通信装置において、回路切換
器を備え、ＣＰＵからの制御信号で回路切換器を
動作させることによつて通信方法を選択できるこ
とを特徴とする通信方法切換装置。 A serial communication device comprising a CPU, a line driver, and a line receiver, characterized in that it is equipped with a circuit switch, and a communication method can be selected by operating the circuit switch with a control signal from the CPU. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989004797U JPH0295948U (en) | 1989-01-19 | 1989-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989004797U JPH0295948U (en) | 1989-01-19 | 1989-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0295948U true JPH0295948U (en) | 1990-07-31 |
Family
ID=31207627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989004797U Pending JPH0295948U (en) | 1989-01-19 | 1989-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0295948U (en) |
-
1989
- 1989-01-19 JP JP1989004797U patent/JPH0295948U/ja active Pending