Write data lines and write amplifier enable signal lines are connected to write amplifiers of a semiconductor memory device which can be switched between one-bit input and output mode configuration and multi-bit input and output mode configuration by the shared use of a single chip. Write mask data for...http://www.google.de/patents/US5148396?utm_source=gb-gplus-sharePatent US5148396 - Semiconductor integrated circuit memory enabling memory write masking
