Interface Design between NAND Flash and AT91RM9200
Jing Mu · Radio and communications technology · 2010
Through a detailed description of NAND Flash device K9K8G08U0A made by Samsung Corporation,the memory organization and the hardware interface signal of NAND Flash are introduced first,along with the interface support of AT91RM9200 to NAND Flash.The advantage and disadvantage of two NAND Flash interface modes are analyzed,and the initialization steps are described with focus put on the interface timing design.Finally,the bad block concept and the ECC algorithm are introduced.With multiplexed I/O interface,the higher density NAND Flash device has the same pin as the old one,which significantly improves system extensibility.