Datasheet

SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
386
Notes: 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.
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.
23.6 Product Dependencies
23.6.1 I/O Lines
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 application, they can be used for other purposes by the PIO
Controller.
NCS0 CS CS CS CE
(3)
–
NCS1 CS CS CS – CS
NCS2 CS CS CS CE
(3)
–
NCS3 CS CS CS CE
(3)
–
NCS4 CS CS CS CE
(3)
–
NCS5 CS CS CS CE
(3)
–
NCS6 CS CS CS CE
(3)
–
NCS7 CS CS CS CE
(3)
–
NANDOE – – – RE –
NANDWE – – – WE –
NRD OEOEOE –
NWR0/NWE WE WE
(2)
WE –
NWR1/NBS1 WE WE
(2)
NUB – DQM1
SDCK ––––CLK
SDCKE ––––CKE
RAS ––––RAS
CAS ––––CAS
SDWE ––––WE
NWAIT –––––
NANDRDY – – – RDY –
Table 23-3. EBI Pins and External Static Device Connections (Continued)
EBI Pins
SMC Pins
SDR-SDRAMC
Pins
8-bit
Static Device
2 x 8-bit
Static Devices
16-bit
Static Device NAND Flash