Sim Card Connector; Rtc Backup Battery - Nokia NSB-7 Series Service Manual

NSB-7
System Module
Name Min
BTEMP 0
2.1
5
0
BGND 0

SIM card connector

The SIM card connector is located on the engine beside the battery pack.
Pin Name Parameter
4 GND GND
3, 5 VSIM 5V SIM Card
3V SIM Card
6 DATA 5V Vin/Vout
3V Vin/Vout
2 SIMRST 5V SIM Card
3V SIM Card
1 SIMCLK Frequency
Trise/Tfall

RTC backup battery

The RTC block in CCONT needs a power backup to keep the clock running when the
phone battery is disconnected. The backup power is supplied from a rechargable Li-ion
battery that can keep the clock running ten minutes minimum. The backup battery is
charged from the main battery through CHAPS.
Signal Parameter
VBACK Backup battery charging
from CHAPS
Backup battery charging
from CHAPS
VBACK Backup battery supply to
CCONT
Page 12
Typ Max Unit
1.4 V
3 V
10 30 ms
1 kohm
0 V
Min Typ
0
4.8 5.0
2.8 3.0
4.0 "1"
0 "0"
2.8 "1"
0 "0"
4.0 "1"
2.8 "1"
3.25
Min Typ
3.02 3.15
100 200
2
ãNokia Mobile Phones Ltd.
PAMS Technical Documentation
Notes
Battery temperature indication
Phone has a 100k (+/-5%) pull-up resistor,
Battery package has a NTC pull-down
resistor: 47k +/-5%@+25C, B=4050 +/-
3%
Phone power up by battery (input)
Power up pulse width
Local mode initialization (in production)
Battery ground
Max Unit Notes
0 V Ground
5.2 V Supply voltage
3.2
VSIM V SIM data
0.5 Trise/Tfall max 1us
VSIM
0.5
VSIM V SIM reset
VSIM
MHz SIM clock
25 ns
Max Unit Notes
3.28 V
500 uA Vout@VBAT-0.2V
3.28 V
Issue 1 06/00