| 摘要 |
Mechanisms are provided for energy management signalling with an apparatus for processing data, such as a system-on-chip integrated circuit. Processing circuitry 28 is coupled to consumer energy interface circuitry 30 which communicates with energy management circuitry. The energy management signals which are communicated include a static power signal indicative of a level of power consumption which is independent of processing operations being performed and a dynamic power signal indicative of a level of dynamic power consumption which is dependent upon the processing operations being performed. The static power signal may be indicative of power consumed by leakage currents and may vary according to one of a plurality of modes of the apparatus when it is not performing processing operations, such as a standby mode, a state retention mode and a power-down mode. The dynamic power signal may represent a prediction of power consumed based upon a level of processing activity. The energy management signals can include a power level allocation signal to limit the total power consumption for the apparatus. The power levels may use a logarithmic encoding or a thermometer encoding. Energy management circuitry may calculate and store various absolute levels of static and dynamic power consumption. |
