Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
48
12.4.1.3 Core Registers
Figure 12-2. Processor Core Registers
Notes: 1. Describes access type during program execution in thread mode and Handler mode. Debug access can differ.
2. An entry of Either means privileged and unprivileged software can access the register.
SP (R13)
LR (R14)
PC (R15)
R5
R6
R7
R0
R1
R3
R4
R2
R10
R11
R12
R8
R9
Low registers
High registers
MSP
‡
PSP
‡
PSR
PRIMASK
FAULTMASK
BASEPRI
CONTROL
General-purpose registers
Stack Pointer
Link Register
Program Counter
Program status register
Exception mask registers
CONTROL register
Special registers
‡
Banked version of SP
Table 12-2. Core Processor Registers
Register Name Access
(1)
Required
Privilege
(2)
Reset
General-purpose registers R0–R12 Read/Write Either Unknown
Stack Pointer MSP Read/Write Privileged See description
Stack Pointer PSP Read/Write Either Unknown
Link Register LR Read/Write Either 0xFFFFFFFF
Program Counter PC Read/Write Either See description
Program Status Register PSR Read/Write Privileged
0x01000000
Application Program Status Register APSR Read/Write Either 0x00000000
Interrupt Program Status Register IPSR Read-only Privileged 0x00000000
Execution Program Status Register EPSR Read-only Privileged 0x01000000
Priority Mask Register PRIMASK Read/Write Privileged 0x00000000
Fault Mask Register FAULTMASK Read/Write Privileged 0x00000000
Base Priority Mask Register BASEPRI Read/Write Privileged 0x00000000
Control Register CONTROL Read/Write Privileged 0x00000000