Patent ID: 6804760
Filing Date: 2004-10-12
Classification: G06F,G11C

Abstract:
A method of determining an operational mode of memory present in a system, comprising:applying a column address to a memory; writing a sequence of data patterns to the memory in a burst mode to at least n, n+1, n+2, and n+3 memory address locations; reading data from the memory in an Extended Data Out page mode beginning at the column address with a column address strobe being high and advancing the column address with each Extended Data Out page mode cycle; and comparing data read from the memory with data written to the memory to determine the operational mode of memory present, wherein comparing data read includes indicating an extended data output type of operational mode with the data read from memory matching data written to the memory at address n using a data pattern in a format selected from a group consisting of single discrete cycles and page mode cycles, and with the data read from memory matching the data written to the memory at address n+3 in a burst format.