at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 182

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Figure 20-6. CompactFlash Application Example
20.5.7
20.5.7.1
6249D–ATARM–20-Dec-07
NAND Flash Support
External Bus Interface 0
NWR1/CFIOR
NWR3/CFIOW
NCS4/CFCS0
A25/CFRNW
External Bus Interfaces 0 and 1 integrate circuitry that interfaces to NAND Flash devices.
The NAND Flash logic is driven by the Static Memory Controller on the NCS3 address space.
Programming the EBI0_CS3A field in the EBI0_CSA Register in the Chip Configuration User
Interface to the appropriate value enables the NAND Flash logic. For details on this register,
refer to the Bus Matrix Section. Access to an external NAND Flash device is then made by
accessing the address space reserved to NCS3 (i.e., between 0x4000 0000 and 0x4FFF FFFF).
The NAND Flash Logic drives the read and write command signals of the SMC on the NANDOE
and NANDWE signals when the NCS3 signal is active. NANDOE and NANDWE are invalidated
as soon as the transfer address fails to lie in the NCS3 address space. See Figure
Signal Multiplexing on EBI Pins” on page 183
forms, refer to the Static Memory Controller section.
NWE/CFWE
EBI
NOE/CFOE
A22/REG
CD (PIO)
D[15:0]
CFCE1
CFCE2
NWAIT
A[10:0]
DIR
/OE
/OE
AT91SAM9263 Preliminary
for more information. For details on these wave-
CompactFlash Connector
D[15:0]
_CD1
_CD2
A[10:0]
_REG
_OE
_WE
_IORD
_IOWR
_CE1
_CE2
_WAIT
“NAND Flash
182