User Guide

NSM–3
System Module
PAMS Technical Documentation
Page 11
Issue 1 12/1999
 Nokia Mobile Phones Ltd.
NotesUnitMaxTypMinName
BTEMP
0 1.4 V Battery temperature indication
Phone has a 100k (+–5%) pullup resistor,
Battery package has a NTC pulldown resistor:
47k+–5%@+25C , B=4050+–3%
2.1
5 10
3
20
V
ms
Phone power up by battery (input)
Power up pulse width
1.9
90 100
2.85
200
V
ms
Battery power up by phone (output)
Power up pulse width
0 1 kohm Local mode initialization (in production)
BGND 0 0 V Battery ground
SIM card connector
The SIM card connector is located on the engine board beside the battery
pack.
Pin Name Parameter Min Typ Max Unit Notes
4 GND GND 0 0 V Ground
3, 5 VSIM 5V SIM Card
3V SIM Card
4.8
2.8
5.0
3.0
5.2
3.2
V Supply voltage
6 DATA 5V Vin/Vout
3V Vin/Vout
4.0
0
2.8
0
”1”
”0”
”1”
”0”
VSIM
0.5
VSIM
0.5
V SIM data
Trise/Tfall max 1us
2 SIMRST 5V SIM Card
3V SIM Card
4.0
2.8
”1”
”1”
VSIM
VSIM
V SIM reset
1 SIMCLK Frequency
Trise/Tfall
3.25
25
MHz
ns
SIM clock
RTC backup battery
The RTC block in CCONT needs a power backup to keep the clock run-
ning when the phone battery is disconnected. The backup power is sup-
plied from a rechargable polyacene battery that can keep the clock run-
ning ten minutes minimum. The backup battery is charged from the main
battery through CHAPS.
Signal Parameter Min Typ Max Unit Notes
VBACK
Backup battery charg-
ing from CHAPS
3.02 3.15 3.28 V
Backup battery charg-
ing from CHAPS
100 200 500 uA Vout@VBAT–0.2V
VBACK
Backup battery supply
to CCONT
2 3.28 V
Backup battery supply
to CCONT
80 uA