Microchip Introduces Hybrid MCU SiP for Automotive HMIs

Automotive and e-mobility applications such as digital instrument clusters, EV charging interfaces, and HVAC controls require high-performance processing and graphics capability, and Microchip Technology’s SAM9X75D5M hybrid MCU System-in-Package (SiP) integrates processing and memory to support advanced human-machine interface (HMI) designs.

The SAM9X75D5M combines an Arm926EJ-S processor with 512 Mbit DDR2 SDRAM within a single package, enabling designers to implement microprocessor-level performance while maintaining a microcontroller-like development environment. Qualified to AEC-Q100 Grade 2, the device is designed for automotive environments requiring reliability across extended temperature ranges.

Integrated Architecture for Simplified Design
By embedding DDR2 memory directly into the SiP, the device eliminates the need for external DRAM components, reducing PCB routing complexity and board space requirements. This integration also mitigates supply chain risks associated with discrete memory sourcing, offering more predictable component availability for automotive production cycles.

The hybrid MCU architecture provides a transition path for developers moving from traditional MCUs to more capable MPU-based systems. It supports Real-Time Operating Systems (RTOS) as well as Linux environments, enabling flexibility depending on application complexity and performance requirements.

Graphics and Display Support for Modern HMIs
The SAM9X75D5M supports display sizes up to 10 inches with XGA resolution (1024 × 768 pixels), addressing the growing demand for richer graphical interfaces in vehicles. Integrated 2D graphics acceleration and audio capabilities allow implementation of interactive dashboards and control panels without requiring additional external components.

Flexible display interface options—including MIPI Display Serial Interface (DSI), Low Voltage Differential Signaling (LVDS), and parallel RGB—enable compatibility with a wide range of display modules used in automotive and e-mobility systems.

Connectivity and Real-Time Communication
The device includes connectivity interfaces such as CAN FD, USB, and Gigabit Ethernet, supporting integration into vehicle networks and external systems. It also supports Time-Sensitive Networking (TSN), enabling deterministic communication required for real-time data exchange in automotive applications.

These capabilities make the device suitable for applications where synchronized data transmission and system responsiveness are critical, such as digital cockpits and smart cluster systems in two- and three-wheel vehicles.

Development Ecosystem and Implementation
Microchip supports the SAM9X75D5M with its MPLAB X Integrated Development Environment and MPLAB Harmony software framework, allowing development across multiple RTOS platforms or bare-metal implementations. Graphics development is supported through Microchip Graphics Suite and third-party tools, facilitating user interface design.

An evaluation platform, the SAM9X75 Curiosity LAN Kit, is available to assist developers in prototyping and testing designs based on the SiP.

Positioning Within Automotive HMI Design
Compared with discrete MCU-plus-memory architectures, System-in-Package solutions such as the SAM9X75D5M offer reduced footprint and simplified hardware design, while providing higher memory capacity for graphics-intensive applications. This makes them suitable for next-generation automotive HMIs where display quality, responsiveness, and integration are key design considerations.

Edited by Natania Lyngdoh, Induportals Editor — Adapted by AI.

www.microchip.com