Apparatus and method for transmitting data between transmission systems using dissimilar phase clocks

An apparatus for transmitting data between transmission systems using dissimilar phase clocks, comprising:

• a receiving unit to process data received from a first system according to a first system clock;
• a write address generating unit to generate a write address according to the first system clock and control a generation of a read address;
• a read address generating unit coupled to receive a control signal from the write address generating unit and to generate a read address according to the control signal of a second system clock;
• a transmitting unit to process data to be transmitted to a second system according to the second system clock;
• and
• a DPRAM to process data between the receiving unit and the transmitting unit according to the write address and the read address.

A method for transmitting data between first and second transmission systems using dissimilar phase clocks, comprising:

• monitoring a state of a second transmission system by a first transmission system;
• generating a write address according to a first system clock when the second transmission system is in a normal state;
• recording data by gaining access to a DPRAM according to the write address;
• generating a read address according to a second system clock and a control signal generated according to the write address and the first and second system clocks;
• and
• retrieving the data from the DPRAM according to the read address.

A method for transmitting data between transmission systems using dissimilar phase clocks, comprising:

• monitoring a state of a first transmission system by a second transmission system;
• generating a write address when the first transmission system is determined to be in a normal state;
• and
• generating a read address when a prescribed period of time elapses after the generation of the write address, wherein generation of the read address is controlled by system clocks of the first and second transmission systems and the generated write address.