ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 62

• Manufacturer Part Number: ATSAM3X4EA-AU
• Description: ARM Microcontrollers - MCU QFP144,GREEN, IND TEMP, MRL A
• Manufacturer: Atmel

Specifications of ATSAM3X4EA-AU

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: SAM3X
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 84 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 3.6 V
• Operating Temperature Range: - 40 C to +85 C
• Package / Case: LQFP-144
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 60

12.4.3.1
12.4.3.2
12.4.3.3
62
62
SAM3X/A
SAM3X/A
General-purpose registers
Stack Pointer
Link Register
Table 12-2.
1.
2.
R0-R12 are 32-bit general-purpose registers for data operations.
The Stack Pointer (SP) is register R13. In Thread mode, bit[1] of the CONTROL register indi-
cates the stack pointer to use:
On reset, the processor loads the MSP with the value from address 0x00000000.
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
Name
R0-R12
MSP
PSP
LR
PC
PSR
ASPR
IPSR
EPSR
PRIMASK
FAULTMASK
BASEPRI
CONTROL
• 0 = Main Stack Pointer (MSP). This is the reset value.
• 1 = Process Stack Pointer (PSP).
Describes access type during program execution in thread mode and Handler mode. Debug
An entry of Either means privileged and unprivileged software can access the register.
access can differ.
Core register set summary
Type
RW
RW
RW
RW
RW
RW
RW
RO
RO
RW
RW
RW
RW
(1)
Either
Privileged
Either
Either
Privileged
Privileged
Privileged
Privileged
Privileged
Privileged
Required
privilege
Either
Either
Privileged
(2)
Reset
value
Unknown
See
description
Unknown
0xFFFFFFFF
See
description
0x01000000
0x00000000
0x00000000
0x01000000
0x00000000
0x00000000
0x00000000
0x00000000
Description
“General-purpose registers” on page 62
“Stack Pointer” on page 62
“Stack Pointer” on page 62
“Link Register” on page 62
“Program Counter” on page 63
“Program Status Register” on page 63
“Application Program Status Register” on
page 64
“Interrupt Program Status Register” on page
65
“Execution Program Status Register” on page
66
“Priority Mask Register” on page 67
“Fault Mask Register” on page 67
“Base Priority Mask Register” on page 68
“CONTROL register” on page 69
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
.