Battery Low / Power Down Detector - Panasonic KX-TC2100BXB Service Manual

KX-TC2100BXB / KX-TC2100BXS / KX-TC2100BXT / KX-TC2100BXW

16.3. Battery Low / Power Down Detector

Circuit Operation:
"Battery Low" and "Power Down" are detected by RF IC which check the voltage from battery. Shortly, every detected blocks
are inside of RF IC. The detected voltage is as follows;
• Battery Low
Battery voltage : V(Batt) < 3.457V
The CPU detects the level and "Recharge battery" LED starts flashing.
• Power Down
Battery voltage : V(Batt) < 3.0V
The output of RF IC (Power Down) becomes low level, then CPU stops working to keep the data (CH number, ID Code, etc.)
<Fig. 6>
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