Patent ID: 7765335
Filing Date: 2010-07-27
Classification: G06F

Abstract:
1. A communication system complying with SPI-4 Phase 2 standard comprising: a local device; an opposing device; a first data channel to transfer payload data from the local device to the opposing device; a second data channel to transfer payload data from the opposing device to the local device; and a first status channel to be able to transfer data from the local device to the opposing device, wherein the local device comprises: a data buffer being configured to store payload data received over the second data channel; a buffer status information output unit periodically outputting buffer status information to the first status channel, the buffer status information indicating a usage status of the data buffer; and a buffer status information insert unit inserting the buffer status information between the payload data according to a priority of the buffer status information in order to output the buffer status information to the first data channel, wherein the opposing device controls to output payload data to the second data channel according to the buffer status information received over the first status channel and the first data channel.