Patent ID: 8671242
Filing Date: 2014-03-11
Classification: G06F

Abstract:
1. A method of protecting boot block space in a NAND memory device comprising: writing a lock enable or lock disable value to at least one register upon receipt of a first serial command signal transmitted over a serial peripheral interface (SPI) to an SPI NAND controller; receiving a serial program execute command in the SPI NAND controller over the SPI to store the lock enable or lock disable value stored in the at least one register value to a write lock bit corresponding to an area of the boot block space; and locking the area of the boot block space if the write lock bit corresponding to the area of the boot block space has a lock enable value, and unlocking the area of the boot block space if the write lock bit corresponding to the area of the boot block space has a lock disable value; wherein the SPI NAND controller operates using the first serial command signal and the serial program execute command without translation into standard NAND format signals.