Patent ID: 7266608
Filing Date: 2007-09-04
Classification: G06F

Abstract:
1. A system for sending and receiving serial data, comprising: a plurality of secondary stations each configured for receiving a refresh request and a synchronization request in a determined time, and for sending one of data and a response to a primary station; and the primary station configured for sending the refresh request and a polling request asking for sending data, and for retrying one of the polling request and the refresh request within the same determined time to all secondary stations from which the primary station failed to receive one of the data and the response, the primary station further configured for sending the synchronization request simultaneously to the plurality of secondary stations, where each of the plurality of secondary stations is designated as one of an input type or output type secondary station and wherein the refresh request is a request to an output type secondary station to output data external to the system, the output type secondary station being designated to output data from the system, where the synchronization request is a request to an input type secondary station to prepare data, and the polling request is a request to the input type secondary station to send data to the primary station, the input type secondary station being designated to prepare and input data to the primary station.