A BIST Algorithm for Bit/Group Write Enable Faults in SRAMs

The use of group (or bit) write enable in memories is becoming very common in embedded memories. The circuitry used to achieve these functions need be thoroughly tested for different kind of defects using specific test sequence. However, most BIST algorithms assume that these write enables are forced active during the global write cycle in the BIST run. This paper presents a serial interface BIST algorithm that is used to test defect on bit/group write enables of these memories.