Products > Integrated Circuits (ICs) > Embedded Processors & Controllers > ATSAM3U2CA-AU

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MCU 32-bit ARM Cortex M3 RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP Tray

  • Package/Case :
  • LQFP-100
  • Product Categories :
  • ARM Microcontrollers - MCU
  • RoHs Status:
  • Rohs
  • In-stock:
  • 270


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ATSAM3U2CA-AU Product Details

A member of the Atmel® 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 128KB of flash and 32KB of SRAM. The peripheral set includes a HS USB device and Phy at 480Mbps, HS multimedia card interface for SDIO/SD/MMC, a 16-bit external bus interface supporting NAND flash, three USARTs, TWI, four SPIs, I2S, four PWM timers, three 16-bit timers, RTC, 4x12-bit and four 10-bit ADC. 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.



    Microcontroller Features


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

    • Memory Protection Unit (MPU)

    • Thumb®-2 instruction set


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

    • 36 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


    • 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


    • 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


    • 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

Technical Parameters

  • Core
  • ARM Cortex M3
  • Data Bus Width
  • 32 bit
  • Maximum Clock Frequency
  • 96 MHz
  • Program Memory Size
  • 128 KB
  • Data RAM Size
  • 36 KB
  • Operating Supply Voltage
  • 1.62 V to 3.6 V
  • Maximum Operating Temperature
  • + 85 C
  • Package / Case
  • LQFP-100
  • Mounting Style
  • Interface Type
  • 3xUSART, 4xSPI, Bus, TWI
  • Length
  • 14 mm
  • Minimum Operating Temperature
  • - 40 C
  • Number of Programmable I/Os
  • 57
  • Number of Timers
  • 8
  • Processor Series
  • ATSAM3x
  • Program Memory Type
  • Flash
  • Factory Pack Quantity
  • 90
  • Tradename
  • Cortex-M3, Cortex

ATSAM3U2CA-AU Documents

  • ATSAM3U2C Technical Documentation of Application Note

ATSAM3U2CA-AU Related Products

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  • **ijay***

    Good product! THX

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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

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We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

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1.We provide 90 days warranty.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


Q: How does Jotrin guarantee that ATSAM3U2CA-AU is the original manufacturer or agent of MICROCHIP?
We have a professional business development department to strictly test and verify the qualifications of MICROCHIP original manufacturers and agents. All MICROCHIP suppliers must pass the qualification review before they can publish their ATSAM3U2CA-AU devices; we pay more attention to the channels and quality of ATSAM3U2CA-AU products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of ATSAM3U2CA-AU chips? Including MICROCHIP original factory information, ARM Microcontrollers - MCU application, ATSAM3U2CA-AU pictures?
You can use Jotrin's intelligent search engine, or filter by SAM3 Products category, or find it through Microchip Technology, Inc Information page.
Q: Are the MICROCHIP's ATSAM3U2CA-AU price and stock displayed on the platform accurate?
The MICROCHIP's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for ATSAM3U2CA-AU, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Q: What is the process for returns or replacement of ATSAM3U2CA-AU?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the ATSAM3U2CAAU we delivered, we will accept the replacement or return of the ATSAM3U2CA-AU only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of ATSAM3U2CA-AU.
(3)The ATSAM3U2CA-AU is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
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Microchip Technology, Inc

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