Static information storage and retrieval – Addressing – Sync/clocking
Reexamination Certificate
2007-03-19
2008-12-09
Le, Thong Q (Department: 2827)
Static information storage and retrieval
Addressing
Sync/clocking
C365S233180, C365S233100, C365S203000
Reexamination Certificate
active
07463548
ABSTRACT:
A DDR DRAM having a test mode and an operational mode and a method for testing the DDR DRAM. The method includes in the order recited: (a) placing the DDR DRAM in test mode; (b) issuing a bank activate command to select and bring up a wordline selected for write of the DDR DRAM; (c) writing with auto-precharge, a test pattern to cells of the DDR DRAM; (d) repeating steps (b) and (c) until all wordlines for write have been selected; (e) issuing a bank activate command to select and bring up a wordline selected for read of the DDR DRAM; (f) reading with auto-precharge, the stored test pattern from cells of the DDR DRAM; and (g) repeating steps (e) and (f) until all wordlines for read have been selected.
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Norris Alan D.
Weinstein Samuel
Wuensche Stephan
Capella Steven
Infineon - Technologies AG
International Business Machines - Corporation
Le Thong Q
Schmeiser Olsen & Watts
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