SAMA5D4 32-Bit Microprocessors Microchip Technology SAMA5D4 32-Bit Microprocessors are high-performance, power-efficient Arm® Cortex®-A5 processor-based MPUs running at up to 600MHz. The SAMA5D4 MPUs integrate the Arm NEON™ SIMD engine for accelerated signal processing, multimedia, and graphics, as well as a 128KB L2-Cache for high system performance. These devices features the Arm TrustZone® enabling a strong security perimeter for critical software, as well as several hardware security features. The SAMA5D4 MPUs also feature advanced user interface and connectivity peripherals.