Answer 3—NAND flash memories tend to be organized into blocks or sectors. Although random access to sectors is supported, the data within a sector must be read or written sequentially. Coupled with their high density, NAND flash memory chips tend to be used in bulk storage applications as replacements for small disk drives.

NOR flash memory chips tend to support fully random access at the byte level, making them suitable for direct connection to a processor bus so that code can be executed in place. This allows them to be used to hold the application firmware for embedded systems or to bootstrap a larger system.

Contributor: David Tweed