Autodetect feature for a spacewire application

Details Autodetect feature for a spacewire application Autodetect feature for a spacewire application

2006-07-10

2010-06-01

Corrielus, Jean B (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

C370S228000

Reexamination Certificate

active

07729430

ABSTRACT:
An autodetect circuit for a router system includes an interface to two bidirectional serial links, an input multiplexer circuit coupled to one side of the link interface for receiving input data signals and clock signals, a receiver coupled to the input multiplexer circuit and to a receive FIFO, a state machine coupled to the receiver, a transmitter coupled to the state machine, a transmit FIFO, and to the other side of the link interface for transmitting output data, and a counter coupled to the state machine for controlling the input multiplexer circuit. The autodetect circuit determines which of the two links “A” or “B” is active and available for transmission. The counter is incremented whenever a link reset occurs. When the count reaches a predetermined maximum count value, a port enable signal is toggled from the default “A” link to the “B” link. When one port is enabled, any activity on the other port is ignored.

REFERENCES:
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patent: 7127669 (2006-10-01), Platenberg et al.
patent: 2005/0058063 (2005-03-01), Masuyama et al.
patent: 2006/0033650 (2006-02-01), Leung et al.
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patent: WO 97/31441 (1997-08-01), None
ECSS-E-50-12A, Space engineering, SpaceWire—Links, nodes, routers and networks, European Cooperation for Space Standardization, The Netherlands, Jan. 24, 2003, pp. 1-124.

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