Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 63

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

The behavior of accesses to each region in the memory map is:

Note:

1.

See 

The Code, SRAM, and external RAM regions can hold programs. However, ARM recommends that programs always use
the Code region. This is because the processor has separate buses that enable instruction fetches and data accesses to
occur simultaneously. 

The MPU can override the default memory access behavior described in this section. For more information, see 

When a system includes shared memory, some memory regions have additional access constraints, and some regions
are subdivided, as 

 shows:  

0x00000000 - 0x1FFFFFFF

Code

Normal

-

Executable region for program code. Data can also be 
put here.

0x20000000 - 0x3FFFFFFF

SRAM

-

Executable region for data. Code can also be put here.

This region includes bit band and bit band alias areas, 
see 

0x40000000 - 0x5FFFFFFF

Peripheral

XN 

This region includes bit band and bit band alias areas, 
see 

0x60000000 - 0x9FFFFFFF

External RAM

-

Executable region for data.

0xA0000000 - 0xDFFFFFFF

External device 

XN 

External Device memory

0xE0000000 - 0xE00FFFFF

Private Peripheral Bus

Strongly- 
ordered 

XN 

This region includes the NVIC, System timer, and 
system control block.

0xE0100000 - 0xFFFFFFFF

Reserved

XN 

Reserved

0x00000000- 
0x1FFFFFFF

Code

-

0x20000000- 
0x3FFFFFFF

SRAM

-

0x40000000- 
0x5FFFFFFF

-

0x60000000- 
0x7FFFFFFF

External RAM

-

0x80000000- 
0x9FFFFFFF