Patent ID: 7457189
Filing Date: 2008-11-25
Classification: G11C

Abstract:
1. A method of operating an integrated circuit memory device, the method comprising: accepting a first selective mode register set command responsive to an enable signal having a first logic value received on a predetermined pin of the integrated circuit memory device during a first selective mode register set operation so that information corresponding to the first selective mode register set command is saved to a mode register; rejecting a second selective mode register set command responsive to a disable signal having a second logic value received on the predetermined pin of the integrated circuit memory device during a second selective mode register set operation so that information corresponding to the second selective mode register set command is not saved to the mode register, wherein the first and second logic values are opposite logic values; and controlling writing of data to a memory cell array of the integrated circuit memory device during a write operation and/or reading of data from the memory cell array during a read operation in accordance with an operational characteristic defined by information saved in the mode register.