RZ/T2H MPU Powers Multi-Axis Real-Time Control for Industrial Ethernet
Modern industrial automation demands ever-higher performance from embedded controllers. The need to handle complex algorithms, real-time communication, and multi-axis motion control on a single chip is driving the evolution of microprocessor technology. A new generation of MPUs is emerging that combines powerful application processing with deterministic real-time control, all while supporting the latest industrial Ethernet standards.
Unified Architecture for Application and Real-Time Processing
At the heart of this advancement is a heterogeneous multicore design that integrates four Arm Cortex-A55 cores running at up to 1.2 GHz for Linux-based application tasks, alongside two Arm Cortex-R52 cores clocked at 1 GHz for hard real-time control. This dual-domain architecture allows a single device to manage both high-level functions like HMI, data logging, and cloud connectivity, and low-level tasks such as motor control loops and I/O processing with microsecond precision.
The Cortex-R52 cores feature tightly coupled memory (TCM) and low-latency access to peripherals, enabling deterministic response times essential for closed-loop control. With support for up to 9 axes of motor control, the MPU can directly handle complex coordinated motion profiles without external FPGAs or dedicated motion controllers. This integration reduces component count, board space, and system cost while improving reliability.
Key Processing Capabilities: The Cortex-A55 cluster delivers 4.8 DMIPS/MHz for compute-intensive tasks, while the Cortex-R52 cores provide deterministic interrupt latency below 20 ns, making it suitable for the most demanding real-time applications.
Industrial Ethernet and TSN: The Backbone of Smart Factories
Seamless connectivity is a cornerstone of Industry 4.0. The MPU integrates a comprehensive set of industrial Ethernet protocols, including EtherCAT, EtherNet/IP, PROFINET RT/IRT, and the emerging Time-Sensitive Networking (TSN) standards. This multi-protocol support allows equipment builders to deploy the same hardware across different network environments, simplifying inventory and reducing development effort.
TSN, in particular, is a game-changer for converged networks. By providing deterministic, low-latency communication over standard Ethernet, TSN enables the coexistence of real-time control traffic and best-effort data on a single network. The MPU’s hardware support for TSN features like 802.1AS time synchronization and 802.1Qbv scheduled traffic ensures precise coordination across distributed nodes, critical for applications like synchronized multi-axis drives and distributed motion control.
| Protocol | Key Features | Typical Applications |
|---|---|---|
| EtherCAT | Cycle times down to 31.25 µs, distributed clocks | High-speed servo drives, I/O systems |
| PROFINET IRT | Isochronous real-time, 250 µs cycle | Motion control, robotics |
| EtherNet/IP | CIP Sync, implicit messaging | Discrete manufacturing, process control |
| TSN | 802.1AS, 802.1Qbv, low jitter | Converged networks, future-proof designs |
Flexible Peripheral Set for Diverse Automation Needs
Beyond the CPU cores and networking, the MPU offers a rich set of peripherals tailored for industrial control. These include multiple PWM timers for motor control, high-speed ADCs for analog feedback, and encoder interfaces for position sensing. The device also features a variety of communication ports such as CAN FD, UART, SPI, and I2C, ensuring compatibility with existing field devices and sensors.
A notable feature is the integrated Gigabit Ethernet switch with TSN support, which allows for daisy-chain or ring topologies without external switches. This simplifies cabling and enhances network resilience. Additionally, the MPU includes a memory controller supporting LPDDR4 and eMMC, providing ample bandwidth and storage for complex applications.
Safety and Security: The MPU incorporates hardware security features such as secure boot, cryptographic accelerators, and a TrustZone-enabled architecture. For functional safety, the Cortex-R52 cores support lockstep operation and ECC memory, enabling certification up to SIL 3 according to IEC 61508.
Development Ecosystem and Software Support
To accelerate time-to-market, a comprehensive software development kit (SDK) is provided, including board support packages (BSPs) for Linux and real-time operating systems. The SDK includes drivers for all peripherals, protocol stacks for industrial Ethernet, and sample code for motor control and networking. This allows engineers to focus on application differentiation rather than low-level integration.
A typical evaluation platform for this MPU includes a baseboard with multiple Ethernet ports (up to 4x 100BASE-TX), USB, RS-232/485, CAN, and expansion headers for custom I/O. It also provides debugging interfaces like JTAG and trace, along with storage options such as microSD and eMMC. Such a setup enables rapid prototyping of industrial controllers, PLCs, and motion systems.
Applications in Modern Industrial Control
The combination of high-performance application cores, deterministic real-time control, and multi-protocol industrial Ethernet makes this MPU ideal for a wide range of automation equipment:
- Programmable Logic Controllers (PLCs): Execute IEC 61131-3 control logic while communicating over EtherCAT or PROFINET with distributed I/O.
- CNC Systems: Perform multi-axis interpolation and toolpath generation with real-time feedback from servo drives.
- Industrial Robots: Coordinate arm kinematics, vision processing, and safety functions on a single chip.
- Motion Controllers: Implement complex camming, gearing, and electronic line shafting for packaging and printing machines.
- Distributed Control Systems (DCS): Provide redundant, deterministic control loops for process industries.
Scalability: The MPU’s architecture supports scalable designs, from compact single-axis drives to complex multi-axis machines, all using the same software platform. This reduces development costs and allows manufacturers to offer a range of products with consistent performance.
Future-Proofing with Open Standards
As industrial automation moves toward greater interoperability and IT/OT convergence, the adoption of open standards like OPC UA and TSN becomes critical. The MPU’s hardware acceleration for TSN and its ability to run Linux alongside real-time tasks position it as a future-proof platform. It can serve as an edge gateway, aggregating data from legacy fieldbuses and forwarding it to cloud analytics via MQTT or OPC UA, all while maintaining real-time control.
Moreover, the dual-core lockstep capability of the Cortex-R52 enables functional safety applications without external safety controllers. This integration simplifies system design and reduces the overall footprint, which is especially valuable in space-constrained environments like collaborative robots and mobile machinery.
In summary, the latest generation of industrial MPUs is redefining what’s possible in embedded control. By merging high-level computing with hard real-time determinism and broad connectivity, these devices empower engineers to build smarter, safer, and more efficient automation systems.
