When a company decides to develop an electronic product, the conversation usually starts with the board, the firmware or the enclosure. Before any of that, however, there is a phase that is rarely named and that determines the rest of the project: defining the electronic architecture.
The electronic architecture is the set of decisions that establishes how the product is organised inside: which functional blocks make it up, how they are powered, how they communicate with each other, which part of the behaviour is resolved in hardware and which in software, and how the device relates to the outside world.
It is not a drawing phase, nor a calculation phase. It is a decision phase. And its effect shows up much later, when changing course no longer costs a meeting but a full redesign of the product.
What is electronic architecture and why is it decided before anything else?
Defining the electronic architecture means translating what the product has to do into a coherent technical structure. Which functions are critical, which signals have to be measured, which elements have to be controlled, to what accuracy, under what conditions and for how long.
From that come the first substantive decisions: the type of processor, the number of boards, the voltage rails, the communications and how autonomous the device has to be.
They are all related to one another: changing one forces a review of the rest. Which is why it pays to take them together and at the start, rather than in isolation as problems appear.
From product requirements to technical decisions
A common mistake in electronics development is to start from the solution instead of the requirement. A module, a processor or a familiar technology gets picked, and the product is then squeezed in around it.
The opposite route works better. First the real requirements are pinned down: operating environment, expected service life, manufacturing volume, target cost, applicable regulations, installation conditions…
Those requirements are not a documentation formality: they are what rules out unworkable routes before any money goes into them.
Power supply, consumption and autonomy
The power supply is one of the most structural decisions in the electronic architecture. A mains-connected device is not the same as a battery-powered one, nor is a product that can afford continuous consumption the same as one that has to go months without maintenance.
This decision shapes the processor, the communications, the sensors, the thermal management and even the size of the product. A demanding autonomy requirement forces a rethink of the whole architecture: low-power modes, wake on event, transmission frequency and firmware architecture.
When autonomy is addressed at the end, as a tweak, it is almost never achieved. When it is treated as an architectural criterion, it stops being a problem.
Communications and integration with other systems
Another architectural decision is how the product communicates: with its own internal modules, with other equipment in the installation and with the outside world. Wired or wireless, industrial protocol or consumer standard, local communication or connection to a platform.
The choice does not depend only on the technology available, but on the environment the device will work in, on the end customer’s infrastructure and on the cost each unit can absorb. And it has direct consequences for the PCB design and for the security of the product, because every external connection is also a route to failure.
The split between hardware, firmware and software
Much of an electronic product’s behaviour can be resolved in several ways. A protection can be a circuit or a routine; a measurement can be refined with a better component or with an algorithm; a function can live in the device or in an external application.
Deciding where each thing lives is an architectural decision with a direct effect on unit cost, on reliability and on the ability to evolve the product after selling it. What is resolved in firmware can be corrected with an update; what is resolved in hardware cannot.
Architecture, manufacturing and product cost
An electronic architecture is not better for being more capable, but for being the right one for the product, the volume and the budget. The number of boards, the wiring and the type of components all feed directly into the manufacturing cost and the assembly cost.
They also feed into industrialisation and into the test plan; an architecture designed to be produced makes it possible to verify each block separately, catch faults before final assembly and scale without redoing the work.
And it shapes certification, because tests are passed or failed on the strength of decisions taken long before the first unit was built.
How we approach electronic architecture at I-MAS
At I-MAS we treat electronic architecture as the first phase of product development, before designing any board. We define the functional blocks, the power criteria, the communications and the split between hardware, firmware and software from the product’s real requirements and its operating environment.
Working this way makes it possible to anticipate the conflicts between electronics, mechanics and software and to reach the design phase with the decisions already taken. Because a well-conceived architecture does not just make the system work: it determines what it costs, how long it takes and how far it can grow.
If your project calls for custom industrial hardware or an electronic solution that combines performance, scalability and design, at I-MAS Electronics we support you throughout the whole process.
