Communication in accordance with a master-slave...

Details Communication in accordance with a master-slave... Communication in accordance with a master-slave...

2007-12-18

2010-11-16

Stiglic, Ryan M (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

C710S015000, C710S104000, C713S324000

Reexamination Certificate

active

07836234

ABSTRACT:
A communication apparatus for communication according to a master-slave communication protocol is formed as a slave instance communicating with a master instance via a bus. The master instance is operative to switch the bus into a bus suspend state if no bus activity is present during a predetermined interval. In response to a bus suspend state, the slave instance makes a transition to a slave suspend state. The communication apparatus includes a monitor configured to monitor the bus activity and a transmitter configured to transmit a signal via the bus if the monitor does not recognize any bus activity during part of the predetermined interval and a transition of the slave instance to the slave suspend state is undesirable, wherein the signal is operative to prevent the master instance from switching the bus into the bus suspend state.

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Compaq et al.; “Universal Serial Bus Specification”; Apr. 27, 2000; Revision 2.0; i-274.
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ETSI SCP TDOC Smart cards; UICC-CLF interface; Physical and logical characteristics (Release 7).

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