Power consumption control of an embedded system based on transmission index of bus module.

摘要

Method, system, and load monitor for controlling power consumption of an embedded system, such as system-on-Chip, SoC. The method obtains a data transmission index between a bus module and a bus, compares the index with a preset numeric range, and adjusts an operation voltage/frequency of said module when the index exceeds the preset range. The index comprises transmission times and/or data traffic, while the numeric range is set according to current bus operation voltage/frequency and is reset based on said adjustment. The system comprises a load module further comprising: comparison logic 406, to compare the index with the preset range and send triggering information when a threshold is exceeded; interruption control logic 407, to trigger the adjustment of operation voltage/frequency; monitoring period counter 401; configuration register 408; transmission time and/or data traffic counter 402, 404. The bus is preferably an AXI or AHB bus. The invention effectively monitors the load of the bus module, adjusting the operation parameters of the module according to the monitoring result to enable the module to operate under proper operation parameters thereby reducing unnecessary power consumption.