When system control logic is distributed across multiple ICs, maintaining timing alignment becomes difficult in real hardware. Signal propagation delays increase, debugging effort grows, and power consumption rises because multiple devices must stay active at the same time. Embedded designs normally benefit from a single control element that can read inputs, execute logic, and drive outputs in a deterministic cycle. Microcontroller ICs address this integration requirement by combining processing core, embedded memory, and control peripherals inside a single device.
