User Guide

PAMS
Technical Documentation
RAE–2
General Information
Page 1–20
Original 02/99
Battery Connector
The Battery connector connects BLN–3 battery to the transceiver. The connec-
tor indicates the removal of battery about 5ms before the loss of power be-
cause pins BSI and BTEMP are shorter than BVOLT and BGND.
Pin Name Min Typ Max Unit Notes
1 VBATT 3.0 3.6 4.1 V Battery voltage
2 BSI
0 2.85 V Battery size indication
Phone has 180kohm pull up resistor.
SIM Card removal detection
(Threshold is 2.4V@VBB=2.8V)
21.8 22 22.2 kohm BBS–5 Service battery (No cells)
31.35 33 34.65 kohm BLN–3 Li–Ion battery (4.1V)
5 ms The minimum time from BSI contact dis-
engaged its battery contact to VBATT/
GND disengaged its battery contacts
when battery is removed.
3 BTEMP 0 1.4 V Battery temperature indication
Phone has a 100k (+–5%) pull–up resis-
tor,
Battery package has a NTC pull–down re-
sistor:
47k+–5%@+25C , B=4050+–3%
4 GND 0 0 V Battery ground