|34108b_geode_nandflash_appnote.pdf||AMD GeodeTM Solutions
External NAND Flash Memory
Circuit on IDE Interface
This application note describes an external NAND Flash Additional decode circuitry is required to have either a hard
module and explains how to connect it to an AMD GeodeTM disk and a NAND device, or multiple NAND devices on the
Solutions based system via its IDE interface. The GeodeTM same IDE channel. The decode could exist as a GPIO sig-
CS5535 and CS5536 companion devices both feature nal and its complement to gate the CS0# signals to the
NAND Flash controllers, however, this Flash on IDE solu- hard disk and the NAND device. Figure 2-2 shows a exam-
tion yields better performance. The NAND Flash module in ple of how this could be realized.
this application is used by the system for the operating sys- VCC
tem. The NAND device is not used for BIOS storage.
Note: This is revision B of this document. The change