ATSAM4CMP32CA-AUR
ATSAM4CMP32CA-AUR - Dual-Core Cortex-M4 120MHz MCU | Microchip
The Microchip Technology ATSAM4CMP32CA-AUR is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller from the SAM4CM series, operating at up to 120MHz with 2MB (2M x 8) of embedded FLASH program memory, 256KB of SRAM, and a 100-pin LQFP (14x14 mm) surface-mount package.
A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded-system hierarchy: microcontroller unit -> embedded processor -> ARM Cortex-M family -> semiconductor device. The SAM4CM family extends this concept to poly-phase metering by pairing two Cortex-M4F cores, allowing computation-heavy tasks such as metrology to run alongside application firmware without contention.
Key features include the dual-core ARM Cortex-M4/M4F architecture with hardware floating-point unit and DSP instructions, 2MB on-chip FLASH with a dual-bank option for safe in-application firmware updates, 256KB of SRAM, a supply range of 1.62V to 3.6V, and cryptographic acceleration hardware. The MRLA (Microchip Recommended Launch Alignment) marking on the Mouser listing indicates production-grade sourcing status, and the device is specified for industrial temperature ranges with ROHS3 compliance.
Technically, the Cortex-M4F core integrates a single-cycle MAC and FPU, while the second core can be assigned to real-time signal processing such as 3-phase metrology calculations. Peripherals typical of the SAM4C family include USARTs, SPI, TWI (I2C), PWM channels, ADCs, and a dedicated hardware cryptography engine supporting AES, DES, SHA, and RSA operations for secure firmware and data handling.
Typical applications include poly-phase smart energy meters, industrial metering and monitoring equipment, secure connected devices, and industrial automation control nodes where dual-core partitioning of metrology and communication tasks is required.
When designing with this MCU, budget the 1.62V to 3.6V supply domain carefully: all I/O banks and the core regulator must respect the datasheet limits, and the 100-LQFP exposed-lead layout requires a solid ground plane and decoupling on each supply pin.
This page adds information gain beyond the manufacturer datasheet: distributor price tiers, drop-in same-family alternatives, application guidance, and design notes synthesized from DigiKey, Mouser, Octopart, and Microchip sourcing data.
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