ATSAM3U4CA-CU Atmel, ATSAM3U4CA-CU Datasheet - Page 60

• Manufacturer Part Number: ATSAM3U4CA-CU
• Description: IC MCU 32BIT 256KB FLSH 100TFBGA
• Manufacturer: Atmel
• Series: SAM3Ur

Specifications of ATSAM3U4CA-CU

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 96MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 57
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 52K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 4x10b, 4x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TFBGA
• Processor Series: ATSAM3x
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Data Ram Size: 52 KB
• Interface Type: 3xUSART, TWI, 4xSPI, Bus
• Maximum Clock Frequency: 96 MHz
• Number Of Programmable I/os: 57
• Number Of Timers: 8
• Operating Supply Voltage: 1.62 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-CM3, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: ATSAM3U-EK
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

13.3.3.1
13.3.3.2
13.3.3.3
13.3.3.4
60
SAM3U Series
General-purpose registers
Stack Pointer
Link Register
Program Counter
Table 13-2.
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
The Program Counter (PC) is register R15. It contains the current program address. Bit[0] is
always 0 because instruction fetches must be halfword aligned. On reset, the processor loads
the PC with the value of the reset vector, which is at address 0x00000004.
Name
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 (Continued)
Type
RW
RW
RW
(1)
Privileged
Privileged
Privileged
Required
privilege
(2)
Reset
value
0x00000000
0x00000000
0x00000000
Description
“Fault Mask Register” on page 65
“Base Priority Mask Register” on page 66
“CONTROL register” on page 67
6430D–ATARM–25-Mar-11
.