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In the non-source synchronous low-speed serial data communication scenario, the clock frequency of the communication counterpart may be biased, which may cause the data receiving end to be unable to accurately sample. In this case, the SOFT-CDR and DPA functions in the high-speed transceiver or LVDS serdes of high-end Altera devices can effectively solve this problem.

Based on STC89C52 single chip microcomputer, it realizes the functions of electronic clock display and adjustment and calendar display and adjustment.