Datasheet

SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
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7.2 Embedded Memories
7.2.1 Internal SRAM
Table 7-1 shows the embedded high-speed SRAM for the various devices.
Note: 1. This device is not commercially available. Mounted only on the SAM3X-EK evaluation kit.
SRAM0 is accessible over the system Cortex-M3 bus at address 0x2000 0000 and SRAM1 at address 0x2008
0000. The user can see the SRAM as contiguous thanks to mirror effect, giving 0x2007 0000 - 0x2008 7FFF for
SAM3X/A8, and 0x2007 8000 - 0x2008 7FFF for SAM3X/A4.
SRAM0 and SRAM1 are in the bit band region. The bit band alias region is mapped from 0x2200 0000 to
0x23FF FFFF.
The NAND Flash Controller (NFC) embeds 4224 bytes of internal SRAM. If the NFC is not used, these
4224 Kbytes can be used as general-purpose SRAM. It can be seen at address 0x2010 0000.
7.2.2 Internal ROM
The SAM3X/A series product embeds an Internal ROM, which contains the SAM-BA

and FFPI program.
At any time, the ROM is mapped at address 0x0010 0000.
7.2.3 Embedded Flash
7.2.3.1 Flash Overview
Table 7-2 shows the Flash organization for the various devices.
The Flash contains a 128-byte write buffer, accessible through a 32-bit interface.
7.2.3.2 Flash Power Supply
The Flash is supplied by VDDCORE.
Table 7-1. Embedded High-speed SRAM per Device
Device Pin Count SRAM0 (KB) SRAM1 (KB) NFC SRAM (KB) Total SRAM (KB)
SAM3X8E
144 64 32 4 100
SAM3X8H
(1)
SAM3A8C
100 64 32 – 96
SAM3X8C
SAM3X4E 144 32 32 4 68
SAM3A4C
100 32 32 – 64
SAM3X4C
Table 7-2. Embedded Flash Memory Organization per Device
Device Flash Size (Kbytes) Number of Banks Number of Pages Page Size (bytes) Plane
SAM3A8 512 2 1024 256 Dual
SAM3X8 512 2 1024 256 Dual
SAM3A4 256 2 512 256 Dual
SAM3X4 256 2 512 256 Dual