SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 397

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

Notes:
24.6
24.6.1
24.7
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
1. I/O8 - I/O15 bits used only for 16-bit NAND Flash.
2. NWR1 enables upper byte writes. NWR0 enables lower byte writes.
3. CE connection depends on the Nand Flash.
Product Dependencies
Functional Description
I/O Lines
For standard Nand Flash devices, it must be connected to any free PIO line.
For “CE don’t care” 8-bit Nand Flash devices, it can be either connected to any NCS
For “CE don’t care” 16-bit Nand Flash devices, it must be connected to any free PIO line.
Table 24-3.
The pins used for interfacing the External Bus Interface may be multiplexed with the PIO lines.
The programmer must first program the PIO controller to assign the External Bus Interface pins
to their peripheral function. If I/O lines of the External Bus Interface are not used by the applica-
tion, they can be used for other purposes by the PIO Controller.
The external memory bus transfers data between the internal AHB Bus (handled by the memory
controllers) and the external memories or peripheral devices. It controls the waveforms and the
parameters of the external address, data and control busses and is composed of the following
elements:
Pin
Controller
NCS4
NCS5
NCS6
NCS7
NANDOE
NANDWE
NRD
NWR0/NWE
NWR1/NBS1
SDCK
SDCKE
RAS
CAS
SDWE
NWAIT
NANDRDY
• The Static Memory Controller (SMC)
• The Nand Flash Controller (NFC)
• The SDRAM Controller (SDRAMC)
EBI Pins and External Static Device Connections (Continued)
8-bit Static
Device
WE
WE
CS
CS
CS
CS
OE
–
–
–
–
–
–
–
–
–
Pins of the Interfaced Device
2 x 8-bit
Devices
Static
WE
WE
CS
CS
CS
CS
OE
–
–
–
–
–
–
–
–
–
(2)
(2)
SMC
Device
16-bit
Static
NUB
WE
CS
CS
CS
CS
OE
–
–
–
–
–
–
–
–
–
NAND Flash
CE
CE
CE
CE
RDY
WE
RE
–
–
–
–
–
–
–
(3)
(3)
(3)
(3)
SAM3X/A
SAM3X/A
SDR-SDRAMC
SDR-SDRAM
DQM1
CKE
RAS
CAS
CLK
WE
–
–
–
–
–
–
–
–
–
–
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