Patent ID: 7945801

Claim:
A semiconductor integrated circuit comprising: memory interface means for interfacing with a synchronous memory; data processing means for processing data; clock generating means for generating clock signals; and memory controlling means coupled to said memory interface means and for performing access control on the synchronous memory which outputs read data in synchronization with a data strobe signal, wherein said memory interface means is configured to be coupled to the synchronous memory, wherein said clock generating means generates an internal clock signal and a memory clock signal for supply to the synchronous memory, wherein said memory interface means determines an arrival delay of a data strobe signal received in a read cycle of the synchronous memory relative to the internal clock signal, samples read data of the read cycle based on a signal obtained by shifting the phase of the received data strobe signal, and synchronizes the sampled read data to the internal clock signal based on a result of the determination of the arrival delay, wherein said memory interface means is controlled by the memory controlling means to determine the arrival delay in the read cycle of the synchronous memory, and wherein said memory interface means is configured to provide the result of determination of the arrival delay to a synchronizing circuit of said memory interface means during a predetermined period in which no read cycle occurs with respect to the synchronous memory.