Method for determining target locking time of delay locked loop of memory apparatus

Abstract

A method for determining a target locking time for a delay locked loop of a memory apparatus are provided. The method includes, a system inputting a first set of input signals to the memory apparatus in accordance with a first set of first operational parameters and a set of second operational parameters, the system measuring a first set of output signals from the memory apparatus in response to the first set of input signals to determine whether the delay locked loop fails at any combination of the first set of first operational parameters and the set of second operational parameters, the system determining a first candidate operational parameter from the first set of first operational parameters under which the delay locked loop does not fail for each of the set of second operational parameters, and the system determining the target locking time based on the first candidate operational parameter.

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