JPS63114349U - - Google Patents
Info
- Publication number
- JPS63114349U JPS63114349U JP606587U JP606587U JPS63114349U JP S63114349 U JPS63114349 U JP S63114349U JP 606587 U JP606587 U JP 606587U JP 606587 U JP606587 U JP 606587U JP S63114349 U JPS63114349 U JP S63114349U
- Authority
- JP
- Japan
- Prior art keywords
- master
- bus
- request signal
- bus request
- masters
- 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
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Bus Control (AREA)
Description
図は本考案の一実施例のブロツク図である。
１……ＯＲゲート、２１，２２，２３，２４…
…ＸＯＲゲート、３１，３２，３３，３４……ゲ
ート、４……並列固定優先順位決定装置、５１，
５２，５３，５４……マスタ、１０１，１０２，
１０３，１０４……バス要求信号、３０１，３０
２，３０３，３０４……強制バス要求信号、５０
１，５０２，５０３，５０４……バス使用許可信
号。
The figure is a block diagram of one embodiment of the present invention. 1...OR gate, 21, 22, 23, 24...
...XOR gate, 31, 32, 33, 34... Gate, 4... Parallel fixed priority determination device, 51,
52, 53, 54... Master, 101, 102,
103, 104...Bus request signal, 301, 30
2,303,304...forced bus request signal, 50
1,502,503,504...Bus use permission signal.
Claims (1)
マスタと、該マスタが出力するバス要求信号と該
バス要求信号を並列に入力し、ただ１つのマスタ
に許可信号を出力する並列固定優先順位決定装置
からなるマルチマスタバスシステムにおいて、該
マスタより出力される強制バス要求信号を設け、
該強制バス要求信号が出力されると、該マスタの
バス要求信号を出力し、他マスタのバス要求信号
を禁止する回路を設けたことを特徴とする、マル
チマスタシステムバスの優先順位決定装置。 A multi-master system consisting of multiple masters connected to a system bus, and a parallel fixed priority determination device that inputs the bus request signal outputted by the masters in parallel and outputs a permission signal to only one master. In a multi-master bus system, a forced bus request signal output from the master is provided,
A multi-master system bus priority determination device, comprising a circuit that outputs a bus request signal of the master and inhibits bus request signals of other masters when the forced bus request signal is output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP606587U JPS63114349U (en) | 1987-01-21 | 1987-01-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP606587U JPS63114349U (en) | 1987-01-21 | 1987-01-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63114349U true JPS63114349U (en) | 1988-07-23 |
Family
ID=30788228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP606587U Pending JPS63114349U (en) | 1987-01-21 | 1987-01-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63114349U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02140854A (en) * | 1988-11-21 | 1990-05-30 | Nec Corp | Bus system |
-
1987
- 1987-01-21 JP JP606587U patent/JPS63114349U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02140854A (en) * | 1988-11-21 | 1990-05-30 | Nec Corp | Bus system |