EP0181007A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Bus broadcast method and apparatus
Assignee: Spacelabs Medical Inc
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Filing: 1985-11-08
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Granted: —
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Expires: 2005-11-08
Abstract
Abstract A broadcast channel capability is added to a multiprocessing combined bus implementation. A transmitter channel portion includes means for continually locking out other combined bus coupled modules from control of the combined bus until the data broadcast is complete. Circuitry is also provided for generating a delayed local broadcast acknowledge since the receiver modules will not generate a normal acknowledge signal due to unique decoding of the receiver circuitry. Receiver circuitry includes data latches into which data words transmitted during the broadcast are sequentially latched. The data latches are coupled to the receiver's CPU data bus. Circuitry is provided for signalling the receiver CPU when the transfer is complete. Fig. 1
Inventors
- 👤 Jeffrey S. Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 07:26
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/36; G06F13/362; G06F15/00; G06F15/16; G06F15/161
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
47 words
A multipoint communication system comprising: a plurality of processing stations coupled together by a combined bus; and broadcast means for transmitting data from one of said processing stations to two or more other processing stations simultaneously over said combined bus, whereby a data broadcast mode is provided.
Claim 2
Dependent Claim
47 words
A multipoint communication system comprising: a plurality of processing stations coupled together by a combined bus; and broadcast means for transmitting data from one of said processing stations to two or more other processing stations simultaneously over said combined bus, whereby a data broadcast mode is provided.
Claim 3
Dependent Claim
34 words
The system of Claim 1 whreein any of said processing stations is enabled to transfer data to the other processing stations over said combined bus only after requesting and receiving control of said bus.
Claim 4
Dependent Claim
39 words
The system of Claim 2 wherein said broadcast means comprises: a transmit circuit including means for continuously locking out all of said processing stations except said transmit station from control of said combined bus until data transmission is complete.
Claim 5
Dependent Claim
35 words
The system of Claim 3 wherein said broadcast means comprises: a receiver circuit intended for temporary reception of data transmitted during said broadcast mode prior to placing said data on the receiving station's data bus.
Claim 6
Dependent Claim
21 words
The system of Claim 4 wherein said data to be transmitted during said broadcast mode comprises a plurality of data words.
Claim 7
Dependent Claim
32 words
The system of Claim 5 wherein said transmit circuit further comprises: means for locally generating a delayed broadcast acknowledge signal for said transmit station after transmission of each of said data words.
Claim 8
Dependent Claim
35 words
The system of Claim 5 or 6 wherein said receiver circuit further comprises: means for sequentially loading said data words as they are received into a plurality of latch circuits coupled to said data bus.
Claim 9
Dependent Claim
33 words
The system of Claim 7 wherein said receiver circuit further comprises: means for sequentially coupling said data from said latch circuits to said data bus as they are received by said latch circuits.
Claim 10
Dependent Claim
22 words
The system of Claim 8 wherein said system further comprises means for notifying said receiver stations when said data transfer is complete.
Claim 11
Dependent Claim
42 words
Method of transferring data from one processing station to more than one other processing stations, comprising transmitting said data from said one processing station to said more than one processing stations simultaneously over a combined bus, thereby providing a data broadcast mode.
Claim 12
Dependent Claim
42 words
Method of transferring data from one processing station to more than one other processing stations, comprising transmitting said data from said one processing station to said more than one processing stations simultaneously over a combined bus, thereby providing a data broadcast mode.
References Cited (Backward Citations)
No citation records indexed.
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