APPARATUS FOR A REDUCED CURRENT WAKE-UP CIRCUIT FOR A BATTERY MANAGEMENT SYSTEM

摘要

An apparatus may include an energy monitoring circuit configured to generate a bitstream dependent upon an amount of charge passing through a sensing unit. The apparatus may also include a control unit configured to receive the bitstream from the energy monitoring circuit, and modify a count value in response to a determined state of each bit of the bitstream. The control unit may also read a first value of the count value at a first time and at a later second time read a second value of the count value. The control unit may assert a wake-up signal in response to a determination that a difference between the first value and the second value is greater than a predetermined threshold value.

主权项

1. An apparatus, comprising:
an energy monitoring circuit configured to generate a bitstream dependent upon an amount of charge passing through a sensing unit; a control unit configured to:
receive the bitstream from the energy monitoring circuit;modify a count value in response to a determined state of each bit of the bitstream;read a first value of the count value at a first time;read a second value of the count value at a second time, wherein the second time occurs after a predetermined amount of time has elapsed since the first time;assert a wake-up signal in response to a determination that a difference between the first value and the second value is greater than a predetermined threshold value.