ATSAM3U2CA-CU

Microchip's SAM3U series is a member of a family of Flash microcontrollers based on the high performance32-bit ARM Cortex-M3 RISC processor. It operates at a maximum speed of 96 MHzand features up to 256 Kbytes of Flash and up to 52 Kbytes of SRAM. The peripheral setincludes a High Speed USB Device port with embedded transceiver, a High Speed MCI forSDIO/SD/MMC, an External Bus Interface with NAND Flash controller, up to 4xUSARTs(SAM3U1C/2C/4C have 3), up to 2xTWIs (SAM3U1C/2C/4C have 1), up to 5xSPIsSAM3U1C/2C/4C have 4), as well as 4xPWM timers, 3xgeneral purpose 16-bit timers, an RTC,a 12-bit ADC and a 10-bit ADC. The SAM3U architecture is specifically designed to sustain high speed data transfers. It includesa multi-layer bus matrix as well as multiple SRAM banks, PDC and DMA channels that enable itto run tasks in parallel and maximize data throughput. It can operate from 1.62V to 3.6V and comes in 100-pin and 144-pin LQFP and BGA packages. The SAM3U device is particularly well suited for USB applications: data loggers, PC peripheralsand any high speed bridge (USB to SDIO, USB to SPI, USB to External Bus Interface).

• Core
  • ARM® Cortex®-M3 revision 2.0 running at up to 96 MHz
  • Memory Protection Unit (MPU)
  • Thumb®-2 instruction set
• Memories
  • From 64 to 256 Kbytes embedded Flash, 128-bit wide access, memory accelerator, dual bank
  • From 16 to 48 Kbytes embedded SRAM with dual banks
  • 16 Kbytes ROM with embedded bootloader routines (UART, USB) and IAP routines
  • Static Memory Controller (SMC): SRAM, NOR, NAND support. NAND Flash controller with 4 Kbytes RAM buffer and ECC
• System
  • Embedded voltage regulator for single supply operation
  • POR, BOD and Watchdog for safe reset
  • Quartz or resonator oscillators: 3 to 20 MHz main and optional low power 32.768 kHz for RTC or device clock.
  • High precision 8/12 MHz factory trimmed internal RC oscillator with 4 MHz Default Frequency for fast device startup
  • Slow Clock Internal RC oscillator as permanent clock for device clock in low power