The Standardization Group for Embedded Technologies, SGET, has published the Open Harmonized FPGA Module specification, marking the first open, vendor-independent attempt to standardise FPGA and SoC-FPGA module design. The specification, referred to as oHFM, is intended to bring the same modular discipline to FPGA-based systems that computer-on-module standards have long provided for processor-centric embedded designs.
FPGA system development has historically relied on highly customised carrier boards built around specific devices, pinouts, and I/O requirements. While this approach offers flexibility, it also increases design time, limits reuse, and makes supplier changes expensive once a platform is established. SGET’s oHFM specification is designed to address these constraints by defining harmonised mechanical form factors, electrical interfaces, and integration principles that can be applied across a wide range of FPGA performance classes.
The specification defines two complementary module approaches. One focuses on connector-based modules intended for high-pin-count and high-bandwidth applications, supporting scalable I/O densities and advanced cooling options. The other addresses solderable modules aimed at cost-sensitive or ruggedised deployments, where low profile and mechanical robustness are critical. Both approaches share common size classes and interface concepts, allowing designs to scale without reworking the fundamental carrier architecture.
SGET positions oHFM as an enabling layer rather than a competing platform, allowing FPGA vendors, module suppliers, and system integrators to develop compatible products within a common framework. The specification supports modern high-speed interfaces and is designed to accommodate advanced SERDES, high-bandwidth memory, and mixed-signal use cases increasingly common in communications infrastructure, edge computing, and industrial signal processing.
The release reflects growing pressure within the FPGA market to reduce time-to-market and engineering overhead as devices become more complex and integration costs rise. While mezzanine card standards and proprietary module ecosystems already exist, they often address specific segments or rely on vendor-defined implementations. An open, harmonised specification aims to lower barriers to entry and make multi-vendor sourcing more realistic over the lifetime of a product.
The oHFM documentation is available for download through SGET under its standard terms, with further design guides and reference material planned to support early adoption. As with previous embedded standards, the long-term impact will depend on ecosystem engagement, including silicon vendor support, availability of commercial modules, and toolchain alignment. For FPGA developers accustomed to bespoke designs, the specification represents a structural shift that could reshape how scalable FPGA systems are built, if industry uptake follows.
