Features Core ARM Cortex -M3 revision 2.0 running at up to 48 MHz Thumb -2 instruction 24-bit SysTick Counter Nested Vector Interrupt Controller Pin-to-pin compatible with SAM7S legacy products (48- and 64-pin versions) and SAM3S (48-, 64- and 100-pin versions) Memories From 16 to 256 Kbytes embedded Flash, 128-bit wide access, memory accelerator, single plane AT91SAM From 4 to 24 Kbytes embedded SRAM 16 Kbytes ROM with embedded bootloader routines (UART) and IAP routines ARM-based System Embedded voltage regulator for single supply operation Flash MCU Power-on-Reset (POR), Brown-out Detector (BOD) and Watchdog for safe operation Quartz or ceramic resonator oscillators: 3 to 20 MHz main power with Failure Detection and optional low power 32.768 kHz for RTC or device clock ATSAM3N Series High precision 8/12 MHz factory trimmed internal RC oscillator with 4 MHz default frequency for device startup. In-application trimming access for frequency adjustment Slow Clock Internal RC oscillator as permanent low-power mode device clock One PLL up to 130 MHz for device clock Up to 10 peripheral DMA (PDC) channels Low Power Modes Sleep and Backup modes, down to 3 A in Backup mode Ultra low power RTC Peripherals Up to 2 USARTs with RS-485 and SPI mode support. One USART (USART0) has ISO7816, IrDA and PDC support in addition Two 2-wire UARTs 2 Two Wire Interface (I2C compatible), 1 SPI Up to 6 Three-Channel 16-bit Timer/Counter with capture, waveform, compare and PWM mode. Quadrature Decoder Logic and 2-bit Gray Up/Down Counter for Stepper Motor 4-channel 16-bit PWM 32-bit Real-time Timer and RTC with calendar and alarm features Up to 16 channels, 384 KSPS 10-bit ADC One 500 KSPS 10-bit DAC I/O Up to 79 I/O lines with external interrupt capability (edge or level sensitivity), debouncing, glitch filtering and on-die Series Resistor Termination Three 32-bit Parallel Input/Output Controllers Packages 100-lead LQFP, 14 x 14 mm, pitch 0.5 mm/100-ball TFBGA, 9 x 9 mm, pitch 0.8 mm 64-lead LQFP, 10 x 10 mm, pitch 0.5 mm/64-pad QFN 9x9 mm, pitch 0.5 mm 48-lead LQFP, 7 x 7 mm, pitch 0.5 mm/48-pad QFN 7x7 mm, pitch 0.5 mm 11011BATARM21-Feb-121. SAM3N Description Atmel s SAM3N series is a member of a family of Flash microcontrollers based on the high per- formance 32-bit ARM Cortex-M3 RISC processor. It operates at a maximum speed of 48 MHz and features up to 256 Kbytes of Flash and up to 24 Kbytes of SRAM. The peripheral set includes 2x USARTs, 2x UARTs, 2x TWIs, 3x SPI, as well as 1 PWM timer, 6x general purpose 16-bit timers, an RTC, a 10-bit ADC and a 10-bit DAC. The SAM3N series is ready for capacitive touch thanks to the QTouch library, offering an easy way to implement buttons, wheels and sliders. The SAM3N device is an entry-level general purpose microcontroller. That makes the SAM3N the ideal starting point to move from 8- /16-bit to 32-bit microcontrollers. It operates from 1.62V to 3.6V and is available in 48-pin, 64-pin and 100-pin QFP, 48-pin and 64-pin QFN, and 100-pin BGA packages. The SAM3N series is the ideal migration path from the SAM3S for applications that require a reduced BOM cost. The SAM3N series is pin-to-pin compatible with the SAM3S series. Its aggressive price point and high level of integration pushes its scope of use far into cost-sensi- tive, high-volume applications. 2 SAM3N 11011BATARM21-Feb-12