at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 139

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Table 20-4.
Notes:
6384B–ATARM–15-Dec-08
Signals:
EBI_
Controller
CFCE2
SDCK
SDCKE
RAS
CAS
SDWE
NWAIT
Pxx
Pxx
Pxx
(2)
(2)
(2)
1. Not directly connected to the CompactFlash slot. Permits the control of the bidirectional buffer between the EBI data bus and
2. Any PIO line.
3. CE connection depends on the NAND Flash. For standard NAND Flash devices, it must be connected to any free PIO line.
the CompactFlash slot.
For “CE don't care” NAND Flash devices, it can be either connected to NCS3/NANDCS or to any free PIO line.
EBI Pins and External Device Connections (Continued)
SDRAMC
SDRAM
CKE
RAS
CAS
CLK
WE
–
–
–
–
–
CompactFlash
CD1 or CD2
(EBI only)
Pins of the Interfaced Device
WAIT
CE2
–
–
–
–
–
–
–
AT91SAM9G20 Preliminary
True IDE Mode
CompactFlash
CD1 or CD2
(EBI only)
WAIT
CS1
SMC
–
–
–
–
–
–
–
NAND Flash
CE
RDY
–
–
–
–
–
–
–
–
(3)
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