Patent ID: 6212645
Filing Date: 2001-04-03
Classification: G06F,G09G,Y02D

Abstract:
A programmable Power Management Unit (PMU) comprising:a state machine receiving as inputs state control signals, in response to the state control signals, the state machine selecting one of a number of main power states for the PMU wherein the selected main power state has N sub-states, in response to control signals, the state machine sequencing through the N sub-states of the selected main power state for the PMU, the state machine generating signals indicating the selected main power state and the N sub-states that the state machine is currently in, wherein each sub-state controlling a corresponding module such that the N sub-states are combined to control the corresponding modules according to a desired sequence, wherein the state machine sequencing the N sub-states according to the sequence that is determined by programmable registers; anda plurality of enable circuits coupled to the corresponding modules, the plurality of enable circuits receiving as inputs the signals from the state machine, the plurality of enable circuits generating signals to control the corresponding modules.