Systems and methods for power management in low power communication device and system

Abstract

A radio module, comprises a battery; and a radio circuit, the radio circuit comprising: a DC-to-DC converter coupled with the batters and configured to convert a battery voltage to a first DC voltage level; at least one regulator coupled with the DC-to-DC converter and configured to covert the first DC voltage level to a second DC voltage level; at least one circuit block coupled with the at least one regulator such that the second DC voltage level is configured to provide power to the at least one circuit block; a real time clock configured to provide a clock signal to the at least one circuit block; and a management unit coupled with the at least one circuit block and configured to implement a state machine to control the at least one circuit block, wherein the state machine causes the management unit to cause the second DC voltage level to be removed from the at least one circuit during a first state comprising the state machine and, during a second state comprising the state machine, cause the second DC voltage level to be provided to the at least one circuit block, cause certain components within the circuit block to be reset, and provide a start signal to the circuit block enabling the circuit block to perform a function, and wherein the circuit block is configured to generate a signal indicating the function has been completed that is provided to the management unit, which causes the state machine to transition to a third state in which the second DC voltage is gain removed from the at least one circuit block.