The Super Nintendo's hardware architecture relies on two critical clock generators that serve as the system's "hearts." The 21.300 MHz oscillator near the CPU and Picture Processing Unit sets the pace for main processing tasks, while the 24.576 MHz ceramic resonator on the audio side handles sound generation. These master clocks distribute timing signals throughout the console.

Nintendo's official documentation shows three oscillators, but physical inspection reveals only two master clocks. The CPU clock frequency discrepancy is resolved by a variable capacitor that adjusts the oscillator output. This design choice allowed technicians to compensate for component drift over time, addressing a common issue where consoles would lose color output.

The console routes the main clock signal to the cartridge port, enabling games with enhancement chips like StarFox's SuperFX processor. Some cartridges, such as Megaman X2, even included their own oscillators. In total, the Super Nintendo generates fifteen distinct clock signals through dividers, creating a complex timing ecosystem that supported both standard games and those with custom hardware acceleration.