Renesas Unveils RZ/A3M Arm Cortex-A55 Microprocessor for High-Performance HMI Applications

Renesas Electronics Corporation has introduced the RZ/A3M, a new Arm Cortex-A55 microprocessor targeting complex HMI (Human-Machine Interface) applications. Operating at up to 1.0 GHz, the RZ/A3M supports RTOS environments and integrates large on-chip SRAM and SDRAM interfaces to handle real-time graphical processing tasks. The processor includes a built-in LCD controller supporting WXGA (1280×800) resolution, making it suitable for high-resolution display systems. Ideal for next-gen home appliances, office devices, industrial automation, medical equipment, and building control interfaces, the RZ/A3M also supports camera and video output, delivering enhanced visual performance for wide-screen applications.

Built on the architecture of its predecessor, the Renesas RZ-A3UL, the RZ/A3M incorporates a 64-bit Arm Cortex-A55 processor running at up to 1 GHz, complemented by 128 KB of on-chip SRAM. Its standout feature is the integration of 128MB on-chip DDR3L SDRAM in a single System-in-Package (SiP), supports both MIPI DSI and parallel display interfaces, and adds a 2D graphics accelerator for smoother user interfaces. The RZ/A3M is intended to speed up development and minimize system costs. Both external NAND and NOR flash are supported via QSPI for data and code storage.

Renesas RZ/A3M specifications:

• CPU: Single-core 64-bit Arm Cortex-A55 processor @ up to 1.0 GHz (Arm NEON / FPU supported)
• GPU: Integrated 2D graphics drawing engine
• Memory:
  • On-chip shared SRAM (128 Kbytes with ECC)
  • Built-in 128MB DDR3L-1600 SDRAM (16-bit bus width)
• Storage:
  • SPI Multi I/O Bus Controller x 1 channel (4-bit Double data rate)
  • Support booting from Serial NAND or Serial NOR Flash
  • SD card host interface x 1 channel
• Display I/F: 4-lane MIPI DSI or Digital parallel output up to 1280×800 resolution @ 60 Hz
• Audio: Serial sound interface (SSI/I2S)
• USB: 1x USB 2.0 (Host-Function)
• Additional Peripherals:
  • GPIO | 2x I2C Bus Interface | 2x SCI (Serial Communication Interfaces)
  • 5x SCIF (Serial Communication Interfaces with FIFO)
  • 2x RSPI (Renesas Serial Peripheral Interfaces)
  • Multi-Function Timer Pulse Unit – 1x 32-bit, 8x 16-bit
  • 3x 32-bit general-purpose timer | Watchdog Timer
• Sensor: 1x Thermal Sensor Unit
• Temperature Range: -40 to +85°C
• Supply Voltage: 2.97 to 3.63 V (PVDD)

To support developers, Renesas provides a robust and comprehensive HMI development environment that includes the Flexible Software Package (FSP) with FreeRTOS or Azure RTOS support, complete with evaluation kits like the Renesas EK-RZ/A3M, sample software, and development tools. Additionally, third-party GUI libraries from ecosystem partners—such as LVGL, Crank, SquareLine Studio, and Envox—are compatible with the RZ/A3M to further accelerate graphical interface development.

Renesas RZ/A3M is available for purchase from the company website at around $13.94 per unit for orders around 500 quantities in bulk volume. The EK-RZ/A3M evaluation kit goes for $284.97 on resellers such as Digikey.  Additional information may be found on the product page and the press release.