Communication apparatus implementing time domain isolation...

Details Communication apparatus implementing time domain isolation... Communication apparatus implementing time domain isolation...

2008-05-27

2008-05-27

Rinehart, Mark H. (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

C710S037000, C455S455000, C455S515000, C455S528000, C348S014100, C375S346000

Reexamination Certificate

active

07380033

ABSTRACT:
A communication apparatus includes a radio frequency circuit that operates on a radio frequency signal and a digital processing circuit coupled to the radio frequency circuit. The digital processing circuit includes a plurality of bus masters coupled to a shared bus. A bus arbiter is provided for arbitrating between requests to access the bus by a first bus master and one or more other bus masters. Accesses by the one or more other bus masters to the bus are restricted in response to a signal indicative of a change in a mode of operation of the RF circuit. In one particular implementation, a communication apparatus employs time domain isolation wherein the digital processing circuit may be placed in a shutdown mode when the radio frequency circuit is active.

REFERENCES:
patent: 5842037 (1998-11-01), Haartsen
patent: 6738845 (2004-05-01), Hadwiger et al.
patent: WO2004021684 (2004-03-01), None

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