Datasheet

SAM9G20
DS60001516A-page 130  2017 Microchip Technology Inc.
19.3 I/O Lines Description
The connection of some signals through the MUX logic is not direct and depends on the Memory Controller currently being used.
Table 19-1: 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_NCS7 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 CompactFlash Support
EBI_CFCE1–EBI_CFCE2 CompactFlash Chip Enable Output Low
EBI_CFOE CompactFlash Output Enable Output Low
EBI_CFWE CompactFlash Write Enable Output Low
EBI_CFIOR CompactFlash I/O Read Signal Output Low
EBI_CFIOW CompactFlash I/O Write Signal Output Low
EBI_CFRNW CompactFlash Read Not Write Signal Output
EBI_CFCS0–EBI_CFCS1 CompactFlash Chip Select Lines 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
SDRAM Controller
EBI_SDCK SDRAM Clock Output
EBI_SDCKE SDRAM Clock Enable Output High
EBI_SDCS SDRAM Controller Chip Select Line Output Low
EBI_BA0–EBI_BA1 Bank Select Output
EBI_SDWE SDRAM Write Enable Output Low
EBI_RAS–EBI_CAS Row and Column Signal Output Low
EBI_NWR0–EBI_NWR3 Write Signals Output Low
EBI_NBS0–EBI_NBS3 Byte Mask Signals Output Low
EBI_SDA10 SDRAM Address 10 Line Output