Microchip's ARM®-based SAM3U1C is a member of the SAM3U family of flash microcontrollers based on the high-performance 32-bit ARM Cortex®-M3 RISC processor.

It operates at a maximum speed of 96MHz and features 64KB of flash memory and 20KB of SRAM.

The peripheral set includes a High Speed USB device and PHY at 480Mbps, high-speed multimedia card interface for SDIO/SD/MMC, a 16-bit external bus interface supporting NAND flash, three USARTs, TWI (I²C), four SPIs, I²S, four PWM timers, three 16-bit timers, RTC, four 12-bit and four 10-bit ADCs.

The architecture is designed to sustain high-speed data transfers. The multi-layer bus matrix, multiple SRAM banks, PDC, and DMA support parallel tasks and maximize data throughput.

The SAM3U1C operates from 1.62V to 3.6V and is available in 100-pin LQFP and BGA packages.

Core

• ARM Cortex-M3 revision 2.0 running at up to 96 MHz

• Memory Protection Unit (MPU)

• Thumb®-2 instruction set

Memories

• 64 Kbytes Dual Plane embedded Flash, 128-bit wide access, memory accelerator, dual bank

• 20 Kbytes embedded SRAM

• 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

• External Bus Interface - 8 or 16 bits, 4 chip selects, 24-bit address

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 mode

• One PLL for device clock and one dedicated PLL for USB 2.0 High Speed Device

• 17 Peripheral DMA Controller (PDC) channels and 4-channel central DMA

Low Power modes

• Sleep, Wait, and Backup modes, down to 1.65 μA in Backup mode with RTC, RTT, and GPBR

Package

• 100-lead LQFP – 14 × 14 mm, pitch 0.5 mm

• 100-ball TFBGA – 9 × 9 mm, pitch 0.8 mm

Temperature operating range

• Industrial (-40° C to +85° C)

Peripheral Features

• USB 2.0 Device: 480 Mbps, 4-Kbyte FIFO, up to 7 bidirectional Endpoints, dedicated DMA

• 3 USARTs (ISO7816, IrDA®, Flow Control, SPI, Manchester support) and one UART

• 2 TWI (I2C compatible)

• 1 Serial Perpheral Interface (SPI)

• 1 Synchronous Serial Controller (SSC) (I2S)

• 1 High Speed Multimedia Card Interface (HSMCI) (SDIO/SD/MMC)

• 3-channel 16-bit Timer/Counter (TC) for capture, compare and PWM

• 4-channel 16-bit PWM (PWMC)

• 32-bit Real-time Timer (RTT) and Real-time Clock (RTC) with calendar and alarm features

I/O

• 57 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

Analog Features

• 4-channel 12-bit 1 msps ADC with differential input mode and programmable gain stage

• 4-channel 10-bit ADC

Debugger Development Support

• Serial Wire/JTAG Debug Port(SWJ-DP)

• Debug access to all memories and registers in the system, including Cortex-M4 register bank when the core is running, halted, or held in reset.

• Serial Wire Debug Port (SW-DP) and Serial Wire JTAG Debug Port (SWJ-DP) debug access.

• Flash Patch and Breakpoint (FPB) unit for implementing breakpoints and code patches.

• Data Watchpoint and Trace (DWT) unit for implementing watchpoints, data tracing, and system profiling.

• Instrumentation Trace Macrocell (ITM) for support of printf style debugging.

• IEEE1149.1 JTAG Boundary-scan on all digital pins.

Integrated Software Libraries and Tools

• ASF-Atmel software Framework – SAM software development framework

• Integrated in the Atmel Studio IDE with a graphical user interface or available as standalone for GCC, IAR compilers.

• DMA support, Interrupt handlers Driver support

• USB, TCP/IP, Wi-Fi and Bluetooth, Numerous USB classes, DHCP and Wi-Fi encryption Stacks

• RTOS integration, FreeRTOS is a core component