SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 57

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

11.4.3
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
Core registers
decrements the stack pointer and then writes the item to the new memory location. The proces-
sor implements two stacks, the main stack and the process stack, with independent copies of
the stack pointer, see
In Thread mode, the CONTROL register controls whether the processor uses the main stack or
the process stack, see
uses the main stack. The options for processor operations are:
Table 11-1.
1.
The processor core registers are:
Program Counter
Processor
mode
Thread
Handler
Low registers
High registers
Stack Pointer
Link Register
See
“CONTROL register” on page
Summary of processor mode, execution privilege level, and stack use options
Used to
execute
Applications
Exception
handlers
FAULTMASK
CONTROL
PRIMASK
“Stack Pointer” on page
BASEPRI
SP (R13)
LR (R14)
PC (R15)
“CONTROL register” on page
PSR
R10
R11
R12
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
Privilege level for
software execution
Privileged or
unprivileged
Always privileged
General-purpose registers
Program status register
Exception mask registers
CONTROL register
65.
PSP
‡
(1)
58.
65. In Handler mode, the processor always
MSP
‡
Stack used
Main stack or process
stack
Main stack
(1)
Special registers
‡
Banked version of SP
SAM3X/A
SAM3X/A
57
57