semiconductor memory device with increased adaptability.

摘要

@ A semiconductor memory device having a PROM with an output register (170) has an initialize input terminal and a programmable initial data memory cell (23) for each bit. When an initialize input signal (INIT) is supplied to the initialize input terminal, the output register (170) is cleared or preset in accordance with the content of the initial data memory cell (23), whereby the reduction of adaptability caused by a drecrease in input terminals can be prevented, a circuit arrangement can be simplified, and a high degree of integratiob and high-speed operation can be achieved.