priestnot
Member level 5
![Member level 5](/styles/images/ranks/dlevel5.gif)
Hello once again.
I have a question about battery management.
I am building a system that operates on batteries. The system is a low power RF device with a 8051 (With ADC and GPIO) that uses a 3V battery to give it power.
The problem is that I need to have a way to inform the base that the battery is lower then a specified value say 2.1V.
I was thinking in using the ADC but the reference is the VCC. So there goes the idea.
Is there a way with external circuit to generate a interruption on the micro or to have another reference for the ADC?
Is there any chip that does the battery management and when the batery voltage is lower then a value it activates a digital output?
I saw this post but I was lokking for a solution based on the microcontroler or on a external chip that does it all.
I have a question about battery management.
I am building a system that operates on batteries. The system is a low power RF device with a 8051 (With ADC and GPIO) that uses a 3V battery to give it power.
The problem is that I need to have a way to inform the base that the battery is lower then a specified value say 2.1V.
I was thinking in using the ADC but the reference is the VCC. So there goes the idea.
Is there a way with external circuit to generate a interruption on the micro or to have another reference for the ADC?
Is there any chip that does the battery management and when the batery voltage is lower then a value it activates a digital output?
I saw this post but I was lokking for a solution based on the microcontroler or on a external chip that does it all.