Serial bus system for shadowing registers

Details Serial bus system for shadowing registers Serial bus system for shadowing registers

1998-05-05

2000-08-22

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

710130, G06F 1300

Patent

active

061087297

ABSTRACT:
The present invention relates to a low latency serial bus system for shadowing registers between first and second digital devices. Either the first device or the second device may initiate a data transfer cycle on the serial bus when data in a shadowed register of that device has changed. The data transfer cycle includes a first frame where data is transferred from the first device to the second device and a second frame where data is transferred from the second device to the first device. The devices do not initiate a subsequent data transfer cycle for changed data if the changed data can be transferred in the current data transfer cycle.

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Universal Serial Bus Specification, Rev. 0.9, pp. 14-22, pp. 63-80, Apr. 1995.

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