Status: Not Recommended for new designs
Microchip's ARM®-based SAM3U4E 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 two 128KB of dual-bank flash memory and 52KB 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, two TWIs (I2C), four SPIs, I2S, four PWM timers, three 16-bit timers, RTC, and eight 12-bit and eight 10-bit ADCs.
The architecture sustains high-speed data transfers, with multi-layer bus matrix, multiple SRAM banks, PDC, and DMA support parallel tasks to maximize data throughput.
The SAM3U4C operates from 1.62V to 3.6V and is available in 144-pin LQFP and BGA packages.
ARM Cortex-M3 revision 2.0 running at up to 96 MHz
Memory Protection Unit (MPU)
Thumb®-2 instruction set
2 x 128Kbytes Dual Plane embedded Flash, 128-bit wide access, memory accelerator, dual bank
52 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
144-lead LQFP – 20 × 20 mm, pitch 0.5 mm
144-ball LFBGA – 10 × 10 mm, pitch 0.8 mm
Temperature operating range
USB 2.0 Device: 480 Mbps, 4-Kbyte FIFO, up to 7 bidirectional Endpoints, dedicated DMA
4 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
96 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
8-channel 12-bit 1 msps ADC with differential input mode and programmable gain stage
8-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
Power Debugger is a powerful development tool for debugging and programming AVR microcontrollers using UPDI, JTAG, PDI, debugWIRE, aWire, TPI or SPI target interfaces and ARM® Cortex®-M based SAM microcontrollers using JTAG or SWD target interfaces.
In addition the Power Debugger has two independent current sensing channels for measuring and optimizing the power consumption of...
SAM-ICE is a JTAG emulator designed for SAMA5, SAM3, SAM4, SAM7 and SAM9 ARM® core-based MCUs and MPUs, including Thumb mode. It supports download speeds up to 720K Bytes per second and maximum JTAG speeds up to 12 MHZ. It also supports Serial Wire Debug (SWD) and Serial Wire Viewer (SWV) from SAM-ICE hardware V6.
Atmel-ICE is a powerful development tool for debugging and programming ARM® Cortex®-M based SAM and AVR microcontrollers with on-chip debug capability.
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