JPS554735A - Semiconductor memory - Google Patents

Abstract

PURPOSE:To make it possible to obtain timing pulses such as precharging clock signals required for the memory circuit operation in a chip by providing a specific disagreement circuit in the memory chip. CONSTITUTION:Address inputs A0, A1, A2... are supplied to not only one input ends of exclusive OR circuits 400, 401, 402,... directly but also the other input ends of circuits 400, 401, 402,... through delay circuits 410, 411, 412,.... Then, inversion signal anti-CS of chip select signal CS not only is supplied to one inversion input end of AND circuit 42 directly but also becomes one input of NOR circuit 44 through delay circuit 43. Outputs of circuits 400, 401, 402,... become inputs of circuit 44, and the output of circuit 44 is supplied to the other inversion input side of circuit 42. Then, output clock pulse phi of circuit 42 is inverted and becomes anti-phi. This circuit is provided in a memory chip which is operated by supplying pulses from the external.