Dual mode capability for system bus

Details Dual mode capability for system bus Dual mode capability for system bus

2007-08-07

2007-08-07

Dang, Khanh (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Protocol

C710S306000, C710S307000, C710S309000, C710S310000

Reexamination Certificate

active

11118051

ABSTRACT:
A computing system with a mode-selectable bus interface. In one embodiment, the computing system includes a system bus, a processor coupled to the bus via an interface unit, and a controller coupled to the bus. The system bus implements one of a first and a second system bus protocols. The interface unit is compatible with the first system bus protocol in a first selectable mode and the second system bus protocol in a second selectable mode, and the controller is compatible with one of the system bus protocols. A mode register is coupled to the interface unit, and the interface unit selects the first mode responsive to a first value of the mode register and selects the second mode responsive to a second value of the mode register. A scan controller is coupled to the mode register for scanning a value into the mode register.

REFERENCES:
patent: 5208838 (1993-05-01), Wendell et al.
patent: 5263172 (1993-11-01), Olnowich
patent: 5537660 (1996-07-01), Bond et al.
patent: 6069897 (2000-05-01), Perlman et al.
patent: 6148347 (2000-11-01), Finch et al.
patent: 7089412 (2006-08-01), Chen

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