How does march algorithm (rx,...,w/x) detect address decoder fault?

[avelyn94]

Hi guys,
i search the web and know that in order to test memory address decoder fault, the March test should contain the two following march elements
(rx, … , wx)
(rx, … , w/x).
May i ask how does those march elements detect address decoder fault by read x and write /x to the memory?

 

[D.A.(Tony)Stewart]

Writing /x with unique values to each location will detect address collisions after scanning memory with some pattern

 

[avelyn94]

hi SunnySkyguy thank you for replying but lets take MARCH++ algorithm as an example M0(w0); M1(r0,w1); M2(r1,w0,r0); during M1 it will read 0 then write 1 but how will it detect when it read 0 first only write 1?