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MULTI-PORT MEMORY DEVICE FOR REDUCING THE LOAD OF GLOBAL DATA BUS BY INCLUDING THE FIRST TO THE FOURTH GLOBAL DATA BUS IN A ROW DIRECTION BETWEEN PORTS AND BANKS
MULTI-PORT MEMORY DEVICE FOR REDUCING THE LOAD OF GLOBAL DATA BUS BY INCLUDING THE FIRST TO THE FOURTH GLOBAL DATA BUS IN A ROW DIRECTION BETWEEN PORTS AND BANKS
PURPOSE: A multi-port device is provided to reduce the loading of a global data bus and to secure the layout efficiency, packaging easiness and expandability by having the first to the fourth global data bus in a row direction between ports and banks. CONSTITUTION: A multi-port device comprises a number of memory cells; plural row decoders(RDEC); a multiplicity of banks(bank0-bank15) which are arranged in a row direction in each quadrant dividing the core area in four; an intermediating unit(100) between the first/the third quadrant and the second/the fourth quadrant to divide the core area in two, for intermediating each component of the memory device by using internal command signals, internal address signals and control signals; plural ports(port0-port7) at each edge of the quadrants for communicating with different target devices independently; the first to the fourth global data bus(GIO_UL, GIO_UR, GIO_DL, GIO_DR) between banks and ports in a row direction, for transmitting data in parallel; the first and the second data bus connection unit(PR_U, PR_D) between two adjacent global data buses, for selectively connecting the two adjacent global data buses, plural transfer buses(TB) arranged in a column direction of each bank, for transmitting data within the banks; plural transfer bus connection units(TG) between two adjacent banks in a column direction, for selectively connecting the transfer buses(TB) of the two adjacent banks; plural bus connection units(TL) between each bank and corresponding global data bus, for exchanging data between the corresponding transfer bus(TB) and the corresponding global data bus; plural data transmission units(TR) between each port and the corresponding global data bus, for transmitting/receiving data.
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