ATSAM4S16BA-AU
ATSAM4S16BA-AU - 120MHz Cortex-M4 MCU | Microchip
Microchip Technology ATSAM4S16BA-AU is a 32-bit ARM Cortex-M4 microcontroller operating up to 120 MHz, with 1 MB of dual-bank embedded Flash, 128 KB of SRAM, and a 64-LQFP 10 mm × 10 mm package. The device belongs to the SAM4S family of embedded microcontrollers and combines a high-performance processor core with extensive programmable peripherals for control-oriented embedded systems.
An ARM Cortex-M4 microcontroller is a 32-bit reduced-instruction-set processor designed for embedded control, and the ATSAM4S16BA-AU adds Flash memory, SRAM, clock management, communication peripherals, and GPIO around that core. Its 2 KB cache improves instruction-fetch performance, while the Memory Protection Unit, DSP instruction set, and Thumb-2 instruction set support efficient real-time and signal-processing workloads. This places the device in the hierarchy of Cortex-M processor, embedded microcontroller, semiconductor, and programmable control system.
Key features include a maximum operating frequency of 120 MHz, 1 MB of Flash organized as 1M × 8 bits, 128 KB of SRAM, and a 1.62 V to 3.6 V operating-supply range. The dual-bank Flash includes ECC, a security bit, and lock features. The integrated DSP instruction set accelerates common arithmetic operations, while the 2 KB cache supports higher instruction throughput from embedded Flash.
The SAM4S architecture provides a Memory Protection Unit for isolating memory regions, supporting both performance and software reliability. Its pin compatibility with the SAM3N, SAM3S, SAM4N, and 64-pin SAM7S families simplifies migration within the Microchip portfolio. The 64-LQFP package exposes a substantial pin count for general-purpose I/O and peripheral connections while remaining compatible with surface-mount manufacturing and inspection processes.
Typical applications include industrial control panels, sensor-hub and condition-monitoring equipment, building automation controllers, data-acquisition systems, embedded gateways, and industrial communication equipment. The combination of 120 MHz processing, 1 MB Flash, and 128 KB SRAM supports moderate real-time workloads, protocol stacks, local data buffering, and control logic without an external memory interface.
Designers should verify the exact peripheral map, pin multiplexing, clock limits, and operating-temperature grade against the manufacturer datasheet before schematic release. The 1.62 V minimum supply and 3.6 V maximum supply define the operating range, while correct decoupling, clock configuration, programming access, and unused-pin handling are essential for reliable operation.
This product page combines the manufacturer-family specifications, package and memory details, lifecycle information, drop-in alternatives, comparison parameters, and practical design guidance into one engineering-focused reference for selecting and implementing the ATSAM4S16BA-AU.
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