Method and apparatus for detecting a row or a column of a memory to repair without reporting all corresponding defective memory cells

摘要

A system including first and second devices. The first device generates a trigger signal to test a memory. The memory has memory cells including first and second cells. The first and second cells are defective and are in a same row or column. The second device: tests the memory in response to the trigger signal and based on a first frequency; generates an error signal in response to detecting the first cell as defective; and based on the test, generates information including first and second addresses of the first and second cells. The first device, based on the error signal, receives the information at a second frequency. The second device compares the first and second addresses, and if a match, continues the test without reporting the second cell as defective. The first device, based on a number of times the first address is matched, repairs the row or the column.