ATSAM4S4BA-AN
ATSAM4S4BA-AN - 120MHz Cortex-M4 256KB MCU | Microchip
The Microchip Technology ATSAM4S4BA-AN is a 32-bit Arm Cortex-M4 microcontroller operating at 120MHz, with 256KB of flash program memory and 64KB of RAM in a 64-pin LQFP package. It operates from 1.2V to 3.3V and is identified as a green, industrial-temperature device. The combination of processing performance, memory capacity, and package size makes it suitable for embedded control, communication, and data-acquisition systems.
A microcontroller is a semiconductor that integrates a processor core, nonvolatile program memory, volatile data memory, peripherals, and I/O in one device. The ATSAM4S4BA-AN belongs to the SAM4S family, where the Arm Cortex-M4 core provides 32-bit instruction execution while integrated peripherals reduce the component count required for an embedded system. In system terminology, it is a microcontroller within the broader category of embedded processors and semiconductors.
Its headline characteristics are a 120MHz operating frequency, 256KB flash memory, 64KB RAM, and a 64-pin LQFP package. Flash retains firmware without continuous power, while RAM supports working data, stack operations, and communication buffers. The stated 1.2V to 3.3V operating range permits integration with common low-voltage embedded systems, while the industrial-temperature designation supports designs expected to operate outside consumer-temperature environments.
The Arm Cortex-M4 architecture is suitable for interrupt-driven control and real-time peripheral management. At 120MHz, the processor provides substantially more instruction throughput than lower-clock Cortex-M devices, although actual response time depends on interrupt latency, peripheral configuration, firmware architecture, and memory access patterns. The 64KB RAM should be evaluated carefully for graphics, large protocol buffers, or multi-stage data processing rather than assuming that the flash capacity can substitute for working memory.
Typical uses include industrial automation modules, sensor-hub controllers, communication equipment, embedded gateways, and compact control boards. In a sensor hub, the microcontroller can acquire measurements, filter data, apply protocol conversion, and manage local status indicators. In industrial equipment, its operating voltage, industrial-temperature designation, and integration level can reduce the need for separate processor and support devices.
Designers should verify the exact pin assignments, exposed support circuitry, clock requirements, decoupling requirements, and programming configuration in the Microchip ATSAM4S4BA documentation before layout. The 64-pin LQFP is easy to inspect and solder, but careful power and ground layout remains necessary for stable operation. Production designs should also confirm peripheral assignments, package dimensions, and timing requirements against the current manufacturer documentation.
This page consolidates the verified manufacturer and distributor information for the ATSAM4S4BA-AN, distinguishes compatible same-package options, summarizes practical selection considerations, and explicitly identifies details that remain unavailable rather than presenting inferred specifications as confirmed facts.
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