Atmel SAM9X25, Manual

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5
11054A–ATARM–27-Jul-11
SAM9X25
External Bus Interface - EBI
D0-D15 Data Bus I/O
D16-D31 Data Bus I/O
A0-A25 Address Bus Output
NWAIT External Wait Signal Input Low
Static Memory Controller - SMC
NCS0-NCS5 Chip Select Lines Output Low
NWR0-NWR3 Write Signal Output Low
NRD Read Signal Output Low
NWE Write Enable Output Low
NBS0-NBS3 Byte Mask Signal Output Low
NAND Flash Support
NFD0-NFD16 NAND Flash I/O I/O
NANDCS NAND Flash Chip Select Output Low
NANDOE NAND Flash Output Enable Output Low
NANDWE NAND Flash Write Enable Output Low
DDR2/SDRAM/LPDDR Controller
SDCK,#SDCK DDR2/SDRAM Differential Clock Output
SDCKE DDR2/SDRAM Clock Enable Output High
SDCS DDR2/SDRAM Controller Chip Select Output Low
BA[0..2] Bank Select Output Low
SDWE DDR2/SDRAM Write Enable Output Low
RAS-CAS Row and Column Signal Output Low
SDA10 SDRAM Address 10 Line Output
DQS[0..1] Data Strobe I/O
DQM[0..3] Write Data Mask Output
High Speed MultiMedia Card Interface - HSMCI0-1
MCI0_CK, MCI1_CK Multimedia Card Clock I/O
MCI0_CDA, MCI1_CDA Multimedia Card Slot Command I/O
MCI0_DA0-MCI0_DA3 Multimedia Card 0 Slot A Data I/O
MCI1_DA0-MCI1_DA3 Multimedia Card 1 Slot A Data I/O
Table 3-1. Signal Description List (Continued)
Signal Name Function Type Active Level