at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 152

• Manufacturer Part Number: at91sam9260-cj
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Figure 20-5. CompactFlash Application Example
20.6.7
20.6.7.1
152
AT91SAM9260
NANDFlash Support
External Bus Interface
NWR1/CFIOR
NWR3/CFIOW
NCS4/CFCS0
A25/CFRNW
The External Bus Interface integrates circuitry that interfaces to NANDFlash devices.
The NANDFlash logic is driven by the Static Memory Controller on the NCS3 address space.
Programming the EBI_CS3A field in the EBI_CSA Register in the Chip Configuration User Inter-
face to the appropriate value enables the NANDFlash logic. For details on this register, refer to
the section “AT91SAM9260 Bus Matrix”. Access to an external NANDFlash device is then made
by accessing the address space reserved to NCS3 (i.e., between 0x4000 0000 and 0x4FFF
FFFF).
The NANDFlash 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
153
troller (SMC)”.
NWE/CFWE
EBI
NOE/CFOE
A22/REG
CD (PIO)
D[15:0]
CFCE1
CFCE2
NWAIT
A[10:0]
for more information. For details on the waveforms, refer to the section “Static Memory Con-
DIR
/OE
/OE
CompactFlash Connector
D[15:0]
_CD1
_CD2
A[10:0]
_REG
_OE
_WE
_IORD
_IOWR
_CE1
_CE2
_WAIT
Figure 20-6 on page
6221G–ATARM–31-Jan-08