| 摘要 |
A high speed interface type device can reduce power consumption and a circuit area, and transmit/receive a 4 bit data in one clock period. The high speed interface type device includes a DRAM unit for generating first clock and clock bar signals which do not have a phase difference from a main clock signal, and second clock and clock bar signals having 90° phase difference from the first clock and clock bar signals in a write operation, storing an inputted 4 bit data in one period of the main clock signal according to the first clock to second clock bar signals, synchronizing the stored data with data strobe signals according to the first clock to second clock bar signals in a read operation, and outputting a 4 bit data in one period of the main clock signal, and a controller for transmitting a command, address signal and data signal synchronized with the main clock signal to the DRAM unit in the write operation, and receiving data signals from the DRAM unit in the read operation.
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