When a prototype needs a different connector layout, enclosure, or peripheral set, a compute module can be worth evaluating alongside a complete single-board computer.
ArmSoM CM5 is an RK3576-based compute module. The CM5 documentation identifies CM5-IO as its companion board; Sige5 is the single-board-computer option in the same processor family. Choose the format around your integration requirements, not the processor name alone.
Build an interface matrix before the schematic
For each required peripheral, record:
- Connector and physical location.
- Interface signals and pin assignments.
- Voltage, power demand and startup requirements.
- Driver and device-tree support in the intended image.
- A repeatable acceptance test.
This turns “we need a camera and a display” into a set of checkable engineering requirements. Also identify shared or multiplexed signals before assuming every function can be used simultaneously.
Establish a reference configuration
Validate the application on a documented carrier configuration first. Keep the exact module revision, carrier revision, image and peripheral models in the project record. Then move one function at a time to the custom design.
Do not treat matching connector shapes as proof of electrical or software compatibility. Review the pin definitions and schematics for the exact hardware revisions. The CM5 documentation includes a revision-specific notice about Pin 21 on v1.2 and its correction in v1.3—an example of why revision tracking matters.
Keep recovery accessible
Plan how a technician will collect debug output, restore an image and identify the hardware after it is installed in the enclosure. Test these paths before the mechanical design makes them difficult to reach.
Your validation plan should also cover power cycling, attached peripherals, thermal behavior and the application’s real workload. A successful bench boot is only the first milestone.
CM5 offers a modular route to explore custom hardware, while the carrier and software integration remain part of the project. Share your required interfaces and enclosure constraints to start a focused design discussion; omit confidential schematics from public posts.