The Microchip's SAM G51 has an ARM® Cortex®-M4 core with an FPU (floating point unit) to maximize data throughput. This allows you to minimize the active-mode power consumption and get the core into sleep mode faster, which will reduce the overall power consumption. The device has 16 DMA channels, which contribute to the extremely high throughput.

The combination of ultra-low power consumption, fast wake-up time, and high throughput is what gives the SAM G51 the edge in space- and power-constrained consumer applications such as sensor hubs. It wakes up quickly, has the throughput needed to reduce the amount of time spent in active mode, and then goes back to sleep with SRAM retention to conserve energy.

This gives the best performance and longest battery life. It is fully-functional all the way down to 1.62V, including flash reads and writes, as well as full ADC operation. This allows for a more flexible power supply scheme that will squeeze extra runtime out of a battery.

Microcontroller Features

Core

• ARM Cortex-M4 with up to 64 Kbytes SRAM on I/D bus providing 0 wait state execution at up to 48 MHz

• Memory Protection Unit (MPU)

• DSP Instructions, Floating Point Unit (FPU), Thumb®-2 instruction set

Memories

• 256 Kbytes embedded Flash

• 64 Kbytes embedded SRAM

System

• Embedded voltage regulator for single-supply operation

• Power-on reset (POR) and Watchdog for safe operation

• Quartz or ceramic resonator oscillators: 3 to 20 MHz with clock failure detection and 32.768 kHz for RTT or system clock

• High-precision 8/16/24 MHz factory-trimmed internal RC oscillator. In-application trimming access for frequency adjustment

• Slow clock internal RC oscillator as permanent low-power mode device clock

• PLL range from 48 MHz to 120 MHz for device clock

• PLL range from 24 MHz to 48 MHz for USB device and USB OHCI

• Up to 30 peripheral DMA (PDC) channels

• 256-bit General-Purpose Backup Registers (GPBR)

  16 external interrupt lines

Power Consumption/Low Power modes

• 103 μA/MHz running Fibonacci in SRAM(Active mode)

• Wait mode down to 6.8 μA

• Wake-up time less than 3.2 μs

Package

• 49-lead WLCSP, 100-pin LQFP, 14 x 14 mm, pitch 0.5 mm

Temperature operating range

• Industrial (-40° C to +85° C)

Peripheral Features

• One USART with SPI mode

• Two UARTs

• Three Two-Wire Interface (TWI) modules featuring two TWI masters and one high-speed TWI slave

• One fast SPI at up to 24Mbit/s

• Two three-channel 16-bit Timer/Counters (TC) with Capture, Waveform, Compare and PWM modes

• One 32-bit Real-Time Timer (RTT)

• One 32-bit Real-Time Clock (RTC)

I/O

• Up to 38 controllable I/O lines with external interrupt capability (edge or level sensitivity), debouncing, glitch filtering and on-die series resistor termination. Individually programmable open-drain, pull-up and pull-down resistor and synchronous output

• Two PIO Controllers provide control of up to 25 I/O lines

Analog Features

• One 8-channel ADC, resolution up to 12 bits, sampling rate up to 600 kSps

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