Datasheet

421
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
25.3 Block Diagram
Figure 25-1. Block Diagram
25.4 I/O Lines Description
SMC
Interface
NANDRDY
D[15:0]
NFC
Internal SRAM
NAND Flash
Controller (NFC)
ECC
NWR0/NWE
NCS[3:0]
NWAIT
NANDOE
NANDWE
A23
NRD
A[0]/NBS0
A[20:1]
NWR1/NBS1
A21/NANDALE
A22/NANDCLE
Control & Status
Registers
SRAM
AHB
Interface
AHB
arbiter
Scrambler
SMC
AHB
Interface
(4 K bytes)
User Interface
Table 25-1. I/O Line Description
Name Description Type Active Level
NCS[3:0] Static Memory Controller Chip Select Lines Output Low
NRD Read Signal Output Low
NWR0/NWE Write 0/Write Enable Signal Output Low
A0/NBS0 Address Bit 0/Byte 0 Select Signal Output Low
NWR1/NBS1 Write 1/Byte 1 Select Signal Output Low
A1 Address Bit 1 Output Low
A[23:2] Address Bus Output
D[15:0] Data Bus I/O
NWAIT External Wait Signal Input Low
NANDRDY NAND Flash Ready/Busy Input
NANDWE NAND Flash Write Enable Output Low
NANDOE NAND Flash Output Enable Output Low
NANDALE NAND Flash Address Latch Enable Output
NANDCLE NAND Flash Command Latch Enable Output