Normal And Extreme Voltages; Power Key And System Power-Up - Nokia 6500 SLIDE RM-240 Service Manual

RM-240
System Module
Charging is controlled by energy management, and external components are needed to protect the baseband
module against EMC, reverse polarity and transient frequency deviation.

Normal and extreme voltages

Energy management is mainly carried out in the two Application Specific Integrated Circuits (ASICs) N2300
BETTY and N2200 AVILMA. These two circuits contains a number of regulators. In addition there are some
external regulators too.
In the table below normal and extreme voltages are shown when a BP-5M S-pack battery is used.
Voltage
Nominal voltage
Lower extreme voltage
Higher extreme voltage
(fast charging)
Vmstr+
Vmstr-
Sw shutdown
Sw shutdown
Vcoff+
Vcoff-

Power key and system power-up

When the battery is placed in the phone the power key circuits are energized (the phone doesn't have a
dedicated power key but the end call key is used). When the end call key is pressed, the system boots up (if
an adequate battery voltage is present).
Issue 1
Figure 21 Small (left) and wide (right) charger plugs
Table 8 Nominal voltages
Voltage [V]
General Conditions
3.700
3.145
4.230
HW Shutdown Voltages
2.1 ± 0.1
1.9 ± 0.1
SW Shutdown Voltages
3.1
3.2
Min Operating Voltage
2.9 ± 0.1
2.6 ± 0.1
COMPANY CONFIDENTIAL
Copyright © 2007 Nokia. All rights reserved.
Condition
Off to on
On to off
In call
In idle
Off to on
On to off
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