Patent ID: 8260984
Filing Date: 2012-09-04
Classification: G06F,H04L,Y02D

Abstract:
1. A serial communication device comprising: a MAC as a media access control that conforms to Serial Media Independent Interface specification and outputs an identical segment data for plural times within a unit period; a mask circuit configured to mask a predetermined segment data out of the plurality of identical segment data and to output the other segment data out of the plurality of identical segment data; and a buffer configured to receive the segment data output from said mask circuit and to output the received segment data to a physical layer device in synchronization with a clock signal, wherein in a high-speed mode, said physical layer device samples the segment data in synchronization with a synchronization signal, wherein in a low-speed mode, said physical layer device samples the segment data every plural cycles of said synchronization signal, wherein said MAC updates content of the segment data every plural cycles of said synchronization signal, and wherein said predetermined segment data masked by said mask circuit is the segment data in a predetermined period other than a period corresponding to the sampling period in said physical layer device.