Power bus control protection method and power bus control protection system

Abstract

A power bus (P-Bus) control protection method applicable to a System on a Chip (SoC) includes sending a packet by a first subsystem among the control subsystem and the plurality of functional subsystems, wherein the first subsystem is taken as a master device, other subsystems are slave devices, and the packet includes an SoC identifier (ID) and a slave ID utilized to jointly indicate a specific subsystem located in a specific SoC; receiving the packet by a second subsystem as a slave device among the control subsystem and the plurality of functional subsystems through its corresponding P-Bus circuit; decoding the packet by the second subsystem to determine whether the packet is directed to the second subsystem based on the SoC ID and the slave ID carried in the packet; and if the packet is directed to the second subsystem, executing corresponding operations by the second subsystem.