SAM3N2B Atmel Corporation, SAM3N2B Datasheet - Page 53

• Manufacturer Part Number: SAM3N2B
• Manufacturer: Atmel Corporation

Specifications of SAM3N2B

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 48 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 23
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 47
• Ext Interrupts: 47
• Quadrature Decoder Channels: 2
• Usb Speed: No
• Usb Interface: No
• Spi: 3
• Twi (i2c): 2
• Uart: 4
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 10
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

10.4.4
10.4.5
10.4.6
11011A–ATARM–04-Oct-10
Exceptions and interrupts
Data types
The Cortex Microcontroller Software Interface Standard
The Cortex-M3 processor supports interrupts and system exceptions. The processor and the
Nested Vectored Interrupt Controller (NVIC) prioritize and handle all exceptions. An exception
changes the normal flow of software control. The processor uses handler mode to handle all
exceptions except for reset. See
70
The NVIC registers control interrupt handling. See
page 151
The processor:
For a Cortex-M3 microcontroller system, the Cortex Microcontroller Software Interface Standard
(CMSIS) defines:
The CMSIS includes address definitions and data structures for the core peripherals in the Cor-
tex-M3 processor. It also includes optional interfaces for middleware components comprising a
TCP/IP stack and a Flash file system.
CMSIS simplifies software development by enabling the reuse of template code and the combi-
nation of CMSIS-compliant software components from various middleware vendors. Software
vendors can expand the CMSIS to include their peripheral definitions and access functions for
those peripherals.
This document includes the register names defined by the CMSIS, and gives short descriptions
of the CMSIS functions that address the processor core and the core peripherals.
from the architectural short names that might be used in other documents.
The following sections give more information about the CMSIS:
This document uses the register short names defined by the CMSIS. In a few cases these differ
• supports the following data types:
• supports 64-bit data transfer instructions.
• manages all data memory accesses as little-endian. Instruction memory and Private
•
• a common way to:
• the names of:
• a device-independent interface for RTOS kernels, including a debug channel.
for more information.
Peripheral Bus (PPB) accesses are always little-endian. See
attributes” on page 55
– 32-bit words
– 16-bit halfwords
– 8-bit bytes
– access peripheral registers
– define exception vectors
– the registers of the core peripherals
– the core exception vectors
for more information.
for more information.
“Exception entry” on page 69
“Nested Vectored Interrupt Controller” on
and
“Memory regions, types and
“Exception return” on page
SAM3N
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