Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
49
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
12.4.1.4 General-purpose Registers
R0–R12 are 32-bit general-purpose registers for data operations.
12.4.1.5 Stack Pointer
The Stack Pointer (SP) is register R13. In Thread mode, bit[1] of the Control Register indicates the stack pointer to
use:
use:
0 = Main Stack Pointer (MSP). This is the reset value.
1 = Process Stack Pointer (PSP).
On reset, the processor loads the MSP with the value from address 0x00000000.
12.4.1.6 Link Register
The Link Register (LR) is register R14. It stores the return information for subroutines, function calls, and
exceptions. On reset, the processor loads the LR value 0xFFFFFFFF
exceptions. On reset, the processor loads the LR value 0xFFFFFFFF
.
12.4.1.7 Program Counter
The Program Counter (PC) is register R15. It contains the current program address. On reset, the processor loads
the PC with the value of the reset vector, which is at address 0x00000004. Bit[0] of the value is loaded into the
EPSR T-bit at reset and must be 1.
the PC with the value of the reset vector, which is at address 0x00000004. Bit[0] of the value is loaded into the
EPSR T-bit at reset and must be 1.