Communications: electrical – Continuously variable indicating – With meter reading
Patent
1990-08-01
1992-12-29
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
34082552, H04B 100
Patent
active
051755360
ABSTRACT:
A method and device for adapting a VME card for use in a VXI system are disclosed. The device resides on a circuit board that is plugged between the VXI bus and the VME card. The device provides two or more sets of VXI configuration registers. Each region of addresses normally used by the VME card is assigned to one of the simulated VXI units, and the device modifies incoming VXI addresses directed to each region so that the VME card responds to the VXI address. The VXI units simulated by the device may include one message-based device and one register-based device, so that both capabilities are available to the VME card. The device buffers signals passing between the VME card and the VXI bus, generating delays and timing signals to produce proper operation of all system components. The device provides bidirectional communication between the VME card and the VXI bus, so that the VME card can be the VXI bus master. The registers of the device can be configured manually by the user or dynamically by the VXI resource manager, permitting full operational conformance with the VXI specification. VME user-defined signals generated by the card are available on an auxiliary connector but are not passed through to the VXI bus.
REFERENCES:
patent: 4404556 (1983-09-01), Messina et al.
patent: 4598360 (1986-07-01), Loskorn
patent: 4733390 (1988-03-01), Shirakawa et al.
patent: 4885569 (1989-12-01), Lellouche
patent: 4908823 (1990-03-01), Haagens et al.
Aschliman Larry D.
Kelsey Randy J.
Magistre Dervis
Nixon Norman A.
Westinghouse Electric Corp.
Williams John K.
Yusko Donald J.
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