Patent ID: 7134028

Claim:
An integrated circuit (IC) including unit power control, said IC comprising: a plurality of functional units, ones of said functional units having a supply line; a prediction unit determining next expected operations for each of said ones and predicting turn on and turn off times for each determined said next expected operation; and, a supply voltage select circuit at each said supply line, each said supply voltage select circuit selectively ramping closed a connection between a supply voltage and a corresponding said supply line responsive to a predicted turn on time and selectively ramping open said connection responsive to a predicted turn off time; wherein the supply voltage select circuit comprises: a selectable bleeder current path between a corresponding said supply line and said supply voltage, said selectable bleeder current path selectively providing a current path to said corresponding supply line; a discharge detector monitoring said corresponding supply line and providing a ready signal when said corresponding supply line is at a selected threshold level; and a supply switch selectively clamping said corresponding supply line to said supply voltage.