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1. (WO1986003925) PROTOCOLE DE COMMUNICATION A LIAISON SERIELLE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

Claims

What We claim and desire to secure by Letters Patent is:
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1. An optimized, transmission-economized serial bus protocol comprising:

at least one eight-bit word further comprising at X0 least:

an operation code and

a subargument.
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2. An optimized protocol as claimed in Claim 1 wherein
said operation code and said subargument comprise, respectively:

5 a start-of-transmission character and

a device address.

3. An optimized protocol as claimed in Claim 2 wherein 0 said start-of-transmission character comprises:

a start-of-message character.

4. An optimized protocol as claimed in Claim 2 or 3 5 wherein said device address comprises:

a device destination address.

5. An optimized protocol as claimed in Claim 2 or 3 o wherein said device address comprises:

the device's source address.

6. An optimized protocol as claimed in Claim 2 wherein 5 said start-of-transmission character comprises:

a start-of-reply character.

7. An optimized protocol as claimed in Claim 2 or 6 wherein said device address comprises:

the device's source address.

8. An optimized protocol as claimed in Claim 1 wherein said word further comprises:

an error detection device.

9. An optimized protocol as claimed in Claim 8 wherein said error detection device comprises:

a parity bit.

10. An optimized protocol as claimed in Claim 9 wherein said parity bit comprises:

an even parity bit.

11. An optimized, transmission-economized serial bus protocol comprising:

at least one eight-bit word further comprising:

either a start-of-transmission or a
start-of- reply character,

either a destination or source address and

an even parity, error detection bit.

12. An optimized method of bus contention comprising:

monitoring the bus for an idle or busy bus condition and

either attempting an asynchronous bus access if the bus is idle or

synchronously attempting a prioritized retry after a busy bus condition is sensed, after a bus access collision is sensed, and upon initial power-up, synchronized to the current message completion.

13. An optimized bus contention method as claimed in Claim 12 wherein said prioritization comprises:

a bit-time delay proportional to said accessing device's address identification.

14. An optimized bus contention method as claimed in Claim 13 wherein said prioritization further comprises:

a constant time delay.

15. An optimized method of inter-device message addressing and handshaking in a multi-access, bussed system, each device having a source and destination address, comprising:

addressing a message to a destination address and

awaiting the addressed destination device to acknowledge by echoing its corresponding source address.

16. An optimized method of inter-device message addressing and handshaking in a multi-access, bussed system, each device having a source and destination address, comprising:

monitoring the bus for an announcement of a source addressed event and

performing a function in response thereto.