PAMS Technical Documentation
System Module
NSB-7
Issue 1 06/00
ã
Nokia Mobile Phones Ltd.
Page 17
by reading the BSI line DC-voltage level with a CCONT (N100) A/D-converter.
Figure 6: BSI connections for all battery types
The battery identification line is used also for battery removal detection. The BSI line is
connected to a SIMCardDetX line of MAD2. SIMCardDetX is a threshold detector with a
nominal input switching level 0.85xVcc for a rising edge and 0.55xVcc for a falling edge.
The battery removal detection is used as a trigger to power down the SIM card before the
power is lost. The BSI contact in the battery contact disconnects before the other con-
Name
Min
Typ
Max
Unit
Notes
BSI
0
2.8
V
Battery size indication 100k pull-up resistor to
VBB in phone
SIM Card removal detection (Threshold is
2.4V@VBB=2.8V)
68
kohm
Indication of a BLB-2 battery (600mAh Li-Ion)
22
kohm
Indication resistor for a service battery
-5
5
%
Indication resistor and pull-up resistor tolerance
SIMCardDetX
MAD
BSI
CCONT
2.8V
TRANSCEIVER
R
s
BATTERY
BSI
BGND
BTEMP
VBATT
10k
10n
100k
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