Atmel SAM9X25, Manual

Page: 313 / 1145

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11054A–ATARM–27-Jul-11
SAM9X25
313
11054A–ATARM–27-Jul-11
SAM9X25
26.4 I/O Lines Description
The connection of some signals through the MUX logic is not direct and depends on the Memory
Controller in use at the moment.
Table 26-2 on page 313 details the connections between the two Memory Controllers and the
EBI pins.
Table 26-1. EBI I/O Lines Description
Name Function Type Active Level
EBI
EBI_D0 - EBI_D31 Data Bus I/O
EBI_A0 - EBI_A25 Address Bus Output
EBI_NWAIT External Wait Signal Input Low
SMC
EBI_NCS0 - EBI_NCS5 Chip Select Lines Output Low
EBI_NWR0 - EBI_NWR3 Write Signals Output Low
EBI_NRD Read Signal Output Low
EBI_NWE Write Enable Output Low
EBI_NBS0 - EBI_NBS3 Byte Mask Signals Output Low
EBI for NAND Flash Support
EBI_NANDCS NAND Flash Chip Select Line Output Low
EBI_NANDOE NAND Flash Output Enable Output Low
EBI_NANDWE NAND Flash Write Enable Output Low
DDR2/SDRAM Controller
EBI_SDCK, EBI_SDCK# DDR2/SDRAM Differential Clock Output
EBI_SDCKE DDR2/SDRAM Clock Enable Output High
EBI_SDCS DDR2/SDRAM Controller Chip Select Line Output Low
EBI_BA0 - 2 Bank Select Output
EBI_SDWE DDR2/SDRAM Write Enable Output Low
EBI_RAS - EBI_CAS Row and Column Signal Output Low
EBI_SDA10 SDRAM Address 10 Line Output
Table 26-2. EBI Pins and Memory Controllers I/O Lines Connections
EBIx Pins SDRAM I/O Lines SMC I/O Lines
EBI_NWR1/NBS1/CFIOR NBS1 NWR1
EBI_A0/NBS0 Not Supported SMC_A0
EBI_A1/NBS2/NWR2 Not Supported SMC_A1
EBI_A[11:2] SDRAMC_A[9:0] SMC_A[11:2]
EBI_SDA10 SDRAMC_A10 Not Supported
EBI_A12 Not Supported SMC_A12
EBI_A[14:13] SDRAMC_A[12:11] SMC_A[14:13]
EBI_A[25:15] Not Supported SMC_A[25:15]
EBI_D[31:0] D[31:0] D[31:0]