IN Brief:
- RZ/G3L and RZ/G3SE combine up to four 1.2GHz Cortex-A55 cores with a 200MHz Cortex-M33 coprocessor.
- RZ/G3L adds Mali-G31 graphics and H.264 video, while RZ/G3SE targets simpler display and gateway applications.
- Pin compatibility, 1mW-level deep standby, PCIe, and TSN-capable Gigabit Ethernet support scalable embedded product families.
Renesas Electronics has expanded its RZ/G general-purpose microprocessor family with the RZ/G3L and RZ/G3SE, two pin-compatible 64-bit devices for human-machine interfaces, industrial gateways, and IoT edge systems. Both combine application-class Arm processing with a Cortex-M33 coprocessor, while their common package and software environment give designers scope to scale graphics and system capability without creating a separate board architecture for each product tier.
The processors use up to four Arm Cortex-A55 cores running at up to 1.2GHz alongside a 200MHz Cortex-M33. The split allows Linux applications and network services to run on the Cortex-A55 cluster while time-sensitive control, supervisory, or low-level functions can be assigned to the M33 rather than competing for the same application-processing resources.
Graphics separate the two parts. RZ/G3L integrates a Mali-G31 GPU and H.264 video codec for applications requiring richer displays, with Renesas identifying smart retail terminals and medical HMIs among the intended uses. RZ/G3SE omits that graphics capability for equipment with more modest display requirements, including EV chargers and industrial gateways.
Because the two devices are pin-compatible, manufacturers can reuse a common PCB across product variants. That can remove a substantial amount of engineering effort from a range containing entry and higher-feature models, since schematic capture, layout, signal-integrity work, power design, EMC testing, and production validation do not necessarily have to begin again when the processor specification changes.
The interface set is intended to support the same approach at system level. PCIe can connect wireless modules or external accelerators, while dual Gigabit Ethernet with time-sensitive networking support provides deterministic networking options for industrial systems. USB and other peripheral interfaces allow the processor to sit between local sensors, displays, control electronics, and wider plant or cloud networks.
Standby consumption is another design point. Renesas specifies power at the 1mW level in deep standby, while retaining the Linux system in memory so operation can resume without a complete operating-system restart. That can be useful in equipment such as gateways, charging infrastructure, and operator terminals that needs to remain network-aware or wake quickly without consuming full operating power continuously.
Hari Pendurty, vice president of the EP Edge AI and Application Processors Business Division at Renesas, said: “As industrial and IoT devices grow more sophisticated, customers need to balance performance, power consumption, connectivity and design scalability.” The common-platform approach is aimed directly at that problem, allowing processing and graphical capability to vary while maintaining more of the surrounding hardware and software.
The devices are available in dual- or quad-core configurations and in 14mm square 400-pin and 17mm square 368-pin LFBGA packages. Renesas also provides error checking and correction for on-chip memory and the external DDR interface, together with Secure Boot, Arm TrustZone, tamper detection, and its own security IP.
The operating-temperature range extends from -40°C to +125°C, supporting equipment expected to operate outside controlled office environments. Renesas also points to its Verified Linux Package, which is compliant with the Civil Infrastructure Platform and intended to support Linux-based systems over extended service lives.
That lifecycle support can be as important as processor performance in industrial equipment. A controller or gateway may remain deployed considerably longer than a consumer computing product, leaving manufacturers responsible for operating-system maintenance, vulnerability remediation, replacement components, and reproducible software builds years after the original hardware design enters production.
Renesas is supporting the devices with GUI environments, operating systems, system-on-modules, and an evaluation kit based on a SMARC v2.1 module and carrier board. Both processors are available now.
The RZ/G3L and RZ/G3SE therefore extend the RZ/G family through common hardware rather than simply adding another pair of application processors. The combination of pin compatibility, a real-time coprocessor, low standby consumption, and industrial networking is intended to let one embedded architecture cover anything from a relatively simple connected gateway to a display-heavy HMI without multiplying the number of boards that have to be designed and maintained.
