AT91SAM9G10_1 Datasheet, PDF (137/730 Pages) ATMEL Corporation – AT91 ARM Thumb-based Microcontrollers

21.3 I/O Lines Description
Table 21-1. I/O Lines Description
Name
Function
EBI
D0 - D31
Data Bus
A0 - A25
Address Bus
NWAIT
External Wait Signal
SMC
NCS0 - NCS7
Chip Select Lines
NWR0 - NWR3
Write Signals
NRD
Read Signal
NWE
Write Enable
NBS0 - NBS3
Byte Mask Signals
EBI for CompactFlash Support
CFCE1 - CFCE2
CompactFlash Chip Enable
CFOE
CompactFlash Output Enable
CFWE
CompactFlash Write Enable
CFIOR
CompactFlash I/O Read Signal
CFIOW
CompactFlash I/O Write Signal
CFRNW
CompactFlash Read Not Write Signal
CFCS0 - CFCS1
CompactFlash Chip Select Lines
EBI for NAND Flash Support
NANDCS
NAND Flash Chip Select Line
NANDOE
NAND Flash Output Enable
NANDWE
NAND Flash Write Enable
SDRAM Controller
SDCK
SDRAM Clock
SDCKE
SDRAM Clock Enable
SDCS
SDRAM Controller Chip Select Line
BA0 - BA1
Bank Select
SDWE
SDRAM Write Enable
RAS - CAS
Row and Column Signal
NWR0 - NWR3
Write Signals
NBS0 - NBS3
Byte Mask Signals
SDA10
SDRAM Address 10 Line
AT91SAM9G10
Type
I/O
Output
Input
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Active Level
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
High
Low
Low
Low
Low
Low
6462A–ATARM–03-Jun-09
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