The Atmel UC3-A3 Xplained has an external SDRAM memory mounted on the board. 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 6. 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 |