The Intel Pentium Processor N-series and J-series as well as the Intel Celeron Processor N-series and J-series are low-power processors often found in entry-level laptops, netbooks, and embedded systems. The Platform Control Unit (PCU) on these processors manages various system-level functions, including power management, thermal control, and sometimes monitoring of system health. The SMBus Port - 0F12 refers to a specific interface that the system uses to communicate with the system's sensor or control devices, such as temperature sensors or voltage regulators, via the System Management Bus (SMBus).

The SMBus is a two-wire interface used by system devices to communicate with each other in order to monitor the system's health, manage power, and control hardware features.