Patent ID: 6622196
Filing Date: 2003-09-16
Classification: G11C

Abstract:
A method of controlling a semiconductor memory device, for controlling operations of at least one first memory element and at least one second memory element which are different from each other, whereinsaid at least one first memory element and said at least one second memory element each has a memory area consisting of a plurality of sectors, a first access operation is performed on said at least one first memory element when a memory area to be externally accessed belongs to said at least one first memory element, and a second access operation is performed on said at least one second memory element when said memory area to be externally accessed belongs to said at least one second memory element, said method further comprising, prior to said first and second access operations, the steps of: (a) assigning logical sector numbers each not larger than a predetermined value to said plurality of sectors in said at least one first memory element and assigning logical sector numbers each larger than said predetermined value to-said plurality of sectors in said at least one second memory element; and (b) designating said memory area to be externally accessed by said logical sector number and comparing a designated-sector number which is thus designated with said predetermined value.