ATSAMG55J19A-AUT

Overview

The ATSAMG55J19A-AUT is a 32-bit ARM Cortex-M4 microcontroller with an integrated Floating Point Unit (FPU) and DSP instructions. It operates at a maximum clock frequency of 120 MHz and includes 512 Kbytes of Flash memory, 160 Kbytes of SRAM, and up to 16 Kbytes of Cache/I-D RAM. The device features 48 programmable I/O lines, an 8-channel 12-bit ADC, USB 2.0 Full Speed Device and OHCI Host capabilities, two I2S controllers, and multiple communication interfaces including USART, SPI, and TWI. It supports industrial operating temperatures from -40°C to +85°C and utilizes a 64-pin LQFP package.

Feature Summary

• High-performance 32-bit ARM Cortex-M4 processor with FPU and DSP support for efficient signal processing.
• Integrated crystal-less USB 2.0 Full Speed Device and USB Host OHCI controller with on-chip transceiver.
• Flexible peripheral set including dual I2S controllers, PDM interface, and real-time event management system.
• Three software-selectable low-power modes: Sleep, Wait, and Backup with asynchronous wakeup capabilities.

Applications

• Consumer electronics devices requiring audio processing via I2S or PDM interfaces.
• Industrial control systems utilizing robust communication protocols like CAN or SPI.
• PC peripherals and data acquisition equipment needing high-speed analog-to-digital conversion.

Procurement Notes

Verify the specific ordering code suffix against official Microchip documentation to confirm package type and carrier format. Ensure compatibility with existing design constraints regarding voltage levels and pin configurations before finalizing procurement decisions.

Selection Notes

Select this component when a balance of processing power and low-power consumption is required for embedded applications. Consider the availability of USB host capabilities and rich peripheral sets for complex system integration needs.

Part Context

This part belongs to the SAM G55 series of microcontrollers designed for general-purpose low-power applications. It shares architectural similarities with other members in the family but offers specific memory sizes and package options tailored for diverse deployment scenarios.

Replacement Considerations

Consult official substitution guides for compatible alternatives within the SAM G55 series or related families. Verify pinout and peripheral compatibility when considering cross-model replacements.

FAQ

What are the supported low-power modes?

The device supports three software-selectable low-power modes: Sleep, Wait, and Backup.

Does the MCU include a floating-point unit?

Yes, the ARM Cortex-M4 core includes a Floating Point Unit (FPU) and DSP instructions.