Attached memories

The Atmel XMEGA-A1 Xplained kit demonstrates how to use the external bus interface (EBI) module to connect a 4-bit SDRAM. An 8MB SDRAM (16Mb x 4) is attached in three-port EBI mode (PORTH, PORTK, and PORTJ). There are also footprints available for adding either an industrial standard or a proprietary Atmel DataFlash serial flash.

Note: The footprints share the same SPI lines including the chip select, and so it is not possible to mount a device on both footprints at the same time.

Table 1. Compatible devices for the footprints
Atmel AT45DB	Atmel AT25DF
AT45DB64D2-CNU	AT25DF641A-SH
AT45DB321D-MWU	AT25DF321A-SH
AT45DB161D-SS	AT25DF161-SH
AT45DB081D-SS	AT25DF081-SSH
AT45DB041D-SS	AT25DF021-SSH
AT45DB021D-SS
AT45DB011D-SS