Description
The Atmel SAM4S series is a member of a family of Flash microcontrollers based on the high
performance 32-bit ARM Cortex-M4 RISC processor. It operates at a maximum speed of 120 MHz and features up to 2048 Kbytes of Flash, with optional dual bank implementation and cache memory, and up to 160 Kbytes of SRAM.

FEATUREs
• Core
– ARM®Cortex®-M4 with a 2Kbytes cache running at up to 120 MHz
– Memory Protection Unit (MPU)
– DSP Instruction Set
–Thumb®-2 instruction set
• Pin-to-pin compatible with SAM3N, SAM3S products (64- and 100- pin versions) and SAM7S legacy products (64-pin version)
• Memories
– Up to 2048 Kbytes embedded Flash withoptional dual bank and cache memory
– Up to 160 Kbytes embedded SRAM
– 16 Kbytes ROM with embedded boot loaderroutines (UART, USB) and IAP routines
– 8-bit Static Memory Controller (SMC): SRAM, PSRAM, NOR and NAND Flash support
• System
– Embedded voltage regulator for single supply operation
– 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
– RTC with Gregorian and Persian Calendar mode, waveform generation in low power modes
– RTC clock calibration circuitry for 32.768 kHz crystal frequency compensation
– 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
– Two PLLs up to 240 MHz for device clock and for USB
– Temperature Sensor
– Up to 22 Peripheral DMA (PDC) Channels