Vbackup Input (Pin 83) - Enfora Enabler III-G Integration Manual

Enfora Enabler III-G
Modem Integration Guide
6.6.16. V Input (Pin 83)
BACKUP
The backup battery can be recharged from the main battery. A programmable voltage regulator powered
by the main battery allows recharging the backup battery. The backup battery charge starts when the
following conditions are met:
Backup battery charge is enabled by a control bit:
•
Main Battery voltage > Backup Battery voltage
•
Main battery > 2.8 Vdc
Note: If the backup battery is not present, the backup battery pin is connected to main battery pin
V is a power input for the Real-Time-Clock when using RTC-Sleep Function (Section 6.6.10)
BACKUP
V
BACKUP
Input Voltage Range
Input Current
GSM0308PB001
Parameter/Conditions
ON mode
BACKUP mode, VBAT=0v
BACKUP mode, VBACKUP=0v
48
Min Typ Max
2.5 V 1 5.5
CC
1.9 V 5.5
BACKUP
1.9 V 2 3.0
CC
10
Version DRAFT – 2/9/2007
Units
Vdc
μA