The ATSAMG55J19A-MU is a SMART SAM G55 series 32-bit Flash Microcontroller based on the high-performance ARM Cortex-M4 RISC processor with floating point unit (FPU). It operates at a maximum speed of 120MHz and features 512kB of flash and up to 176kB of SRAM. The peripheral set includes eight flexible communication units comprising USARTs, SPIs and I2C-bus interfaces (TWIs), two three-channel general-purpose 16-bit timers, two I2S controllers, one-channel pulse density modulation, one 8-channel 12-bit ADC, one real-time timer (RTT) and one real-time clock (RTC). The SMART SAM G55 devices have three software-selectable low-power modes, sleep, wait and backup. In sleep mode, the processor is stopped while all other functions can be kept running. In wait mode, all clocks and functions are stopped but some peripherals can be configured to wake up the system based on events, including partial asynchronous wake-up (SleepWalking?). In backup mode, RTT, RTC and wakeup logic are running.
- ARM Cortex-M4 with up to 16kB SRAM on I/D bus providing 0 wait state execution at up to 120MHz
- Memory protection unit (MPU)
- DSP Instructions
- Floating point unit (FPU)
- Thumb?-2 instruction set
- Embedded trace module (ETM) with instruction trace stream, Trace port interface unit (TPIU)
- Power-on reset (POR) and watchdog for safe operation
- 3 to 20MHz Resonator oscillators
- High-precision factory-trimmed internal RC oscillator
- Slow clock internal RC oscillator as permanent low-power mode device clock
- PLL range from 48MHz to 120MHz for device clock
- PLL range from 24MHz to 48MHz for USB device and USB OHCI
- Up to 30 peripheral DMA (PDC) channels
- 256-bit General purpose backup registers (GPBR)
- 16 External interrupt lines
- USB 2.0 device and USB host OHCI with on-chip transceiver
- 1 Pulse density modulation Interface (PDMIC) (supports up to two microphones)
- 1x 32-bit Cyclic redundancy check calculation unit (CRCCU)
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