SAM4L Datasheet, PDF (55/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
7.2 Embedded Memories
• Internal high-speed flash
– 256Kbytes (ATSAM4Lx4)
– 128Kbytes (ATSAM4Lx2)
• Pipelined flash architecture, allowing burst reads from sequential flash locations, hiding
penalty of 1 wait state access
• Pipelined flash architecture typically reduces the cycle penalty of 1 wait state operation
compared to 0 wait state operation
• 100 000 write cycles, 15-year data retention capability
• Sector lock capabilities, bootloader protection, security bit
• 32 fuses, erased during chip erase
• User page for data to be preserved during chip erase
• Internal high-speed SRAM, single-cycle access at full speed
– 32Kbytes (ATSAM4Lx4, ATSAM4Lx2)
7.3 Physical Memory Map
The system bus is implemented as a bus matrix. All system bus addresses are fixed, and they
are never remapped in any way, not even during boot. The 32-bit physical address space is
mapped as follows:
Table 7-1. ATSAM4L4/L2 Physical Memory Map
Memory
Start Address
Size
ATSAM4Lx4
Embedded Flash
0x00000000
256 Kbytes
Embedded SRAM
0x20000000
32 Kbytes
Cache SRAM
0x21000000
4Kbytes
Peripheral Bridge A
0x40000000
64 Kbytes
Peripheral Bridge B
0x400A0000
64 Kbytes
AESA
0x400B0000
256 bytes
Peripheral Bridge C
0x400E0000
64 Kbytes
Peripheral Bridge D
0x400F0000
64 Kbytes
Size
ATSAM4Lx2
128 Kbytes
32 Kbytes
4Kbytes
64 Kbytes
64 Kbytes
256 bytes
64 Kbytes
64 Kbytes
Table 7-2. Flash Memory Parameters
Device
Flash Size (FLASH_PW)
ATSAM4Lx4
256 Kbytes
ATSAM4Lx2
128 Kbytes
Number of Pages (FLASH_P)
512
256
Page Size (FLASH_W)
512 bytes
512 bytes
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42023C–SAM–02/2013