Write control state machine: write control state machine consists of four states, namely idle state, ruling the state, writing, putting an end state. Idle state: all counters, registers cleared, waiting for the arrival of data frames. Decision Status: If the data enable signal appears high to jump to the state to complete its function is under the header of the Preamble to determine that the frame is received or discarded. Preamble by the 15 1010 and a 1011 form, if you receiving more than 8 or 8 1010, and then receive a 1011, then the frame can be considered valid, otherwise, believe that this frame has been a serious mistake code, or enable signal is set high because of the emergence of the illusion of outside interference, so the frame will be discarded and return to the Idle state.
EMCs information security department of revenue reached 114 million, which is the RSA The Security Division of EMCs first full operating quarter, and composition of the sector was the acquisition of two companies announced the results of the previous year compared to the same period increased by 26%. The end of the fourth quarter, EMC holds 5.6 billion in cash and investments. 2006, EMC has invested nearly 38 billion to repurchase 302 million shares of EMC stock and 125 million of convertible bonds. EMC expects 2007 revenue of at least 12.7 billion, up 14% over 2006; 2007 earnings per share will be at least 64 cents, up 19% over 2006.