20.2. 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 this level and “Recharge battery” LED starts flashing .
•
• •
• Power Down
Battery voltage : V(Batt) < 3.0V
The output of RF IC (P-DOWN) becomes low level, t hen CPU stops working to keep the data (CH number, ID Code, etc.)
Fig. 6
48
KX-TC2000NZB / KX-TC2000NZW / KX- TC2000NZF