
NSW-6
System Module SE2
PAMS Technical Documentation
Page 29
Issue 1 12/99
Nokia Mobile Phones Ltd.
Parameter
Symbol
LIM input
Min
Typ
Max
Unit
Output voltage cutoff limit
(during transmission or Li–
battery)
VLIM1
LOW
4.4
4.6
4.8
V
Output voltage cutoff limit
(no transmission or Ni–bat-
tery)
VLIM2
HIGH
4.8
5.0
5.2
V
The voltage limit (VLIM1 or VLIM2) is selected by logic LOW or logic HIGH
on the CHAPS LIM– input pin. Default value is lower limit VLIM1.
Battery Identification
Different battery types are identified by a pulldown resistor inside the
battery pack. The BSI line inside transceiver has a 100k pullup to VBB.
The MCU can identify the battery by reading the BSI line DC–voltage level
with a CCONT A/D–converter.
BSI
CCONT
Vbb
TRANSCEIVER
R
s
BATTERY
BSI
BGND
BTEMP
BVOLT
10k
10n
100k
Vibra Schematic
47k at
25 deg C