Multiplexing and bypass circuit for interfacing either...

Details Multiplexing and bypass circuit for interfacing either... Multiplexing and bypass circuit for interfacing either...

2005-06-27

2008-12-30

Patel, Niketa I (Department: 2181)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S036000, C710S037000, C710S038000, C370S221000, C370S351000

Reexamination Certificate

active

07472210

ABSTRACT:
Single and dual ported devices are interfaced to a system via a 2:2 multiplexing device. The multiplexing device is coupled to two system ports and two device ports. The multiplexing device includes an active multiplexer coupled to the two system ports and a multiplexed port. The multiplexing device also includes bypass circuitry coupled to the two system ports and two bypass ports. In operation, when the multiplexing device is coupled via one of the device ports to a single ported device such as a single ported disk drive, the active multiplexer is activated and the bypass circuitry is deactivated and the multiplexed port is coupled to the device port. When the multiplexing device is coupled via both device ports to a dual ported device, the active multiplexer is deactivated and the bypass circuitry is activated and the bypass ports are coupled to the two device ports.

REFERENCES:
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