Patent ID: 9064601
Filing Date: 2015-06-23
Classification: G11C

Abstract:
1. A method of providing write recovery protection in a pseudo-static random access memory (PSRAM), comprising: selecting a bit on a word line of the PSRAM; keeping the word line on for a first predetermined duration after selecting the bit; writing a data into the bit in response to an enabled write enable signal, wherein the enabled write enable signal corresponds to a write operation; and keeping the word line on for a second predetermined duration after the enabled write enable signal ends; wherein a sum of the first predetermined duration and the second predetermined duration forms a predetermined duration, a start of the predetermined duration leads start of the enabled write enable signal and an end of the predetermined duration lags an end of the enabled write enable signal, and the predetermined duration is used for making a length of the word line on be greater than a length of the enabled write enable signal to provide a sufficient write recovery time for the enabled write enable signal when the PSRAM performs the write operation.