Summary

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.

Additional Features

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

Parametrics

Part Family

ATSAM3U1C

Max CPU Speed MHz

Program Memory Size (KB)

SRAM (KB)

SDIO/SD-CARD/eMMC

Temperature Range (C)

-40 to 85

Operating Voltage Range (V)

1.62 to 3.6

Direct Memory Access Channels

SPI

I2C

Peripheral Pin Select / Pin Muxing

Yes

Number of USB Modules

USB Interface

High Speed

ADC Input

Max ADC Resolution (Bits)

Max ADC Sampling Rate (ksps)

1000

Input Capture

Max 16-bit Digital Timers

Parallel Port

EBI

Internal Oscillator

4,8,12Mhz,32Khz

Hardware RTCC/RTC

Yes

Max I/O Pins

Pincount

100

Quadrature Encoder Interface

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Integrated Development Environments

Atmel Studio IDE ( Atmel-Studio )

Studio 7 is the integrated development platform (IDP) for developing and debugging all AVR® and SAM microcontroller applications. The Atmel Studio 7 IDP gives you a seamless and easy-to-use environment to write, build and debug your applications written in C/C++ or assembly code. It also connects seamlessly to the debuggers, programmers and development kits that support AVR® and SAM...

ATSAM3U1C

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