Patent ID: 11929137
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for testing a memory, comprising the steps of:
providing a database, the database comprising a deviation value between a data strobe signal and a clock signal and a corresponding relationship between the deviation value and a memory parameter;
searching the database for a deviation value corresponding to a preset memory parameter when a read command is applied to the memory under the preset memory parameter;
acquiring a time value at which an output signal is to be captured according to the deviation value corresponding to the preset memory parameter; and
capturing the output signal at the time value to perform the testing for the memory;
wherein providing the database comprises the steps of:
applying a read command to the memory under a memory parameter;
capturing a plurality of output signals of the memory at a set timestep taking a preset time value as a starting point;
taking a difference between a time value at which a valid output signal is captured and the preset time value as the deviation value between the data strobe signal and the clock signal, which corresponds to the memory parameter; and
changing the memory parameter and repeating the above steps to form the database;

wherein the output signal is compared with a testing signal to determine whether the output signal is valid.