Sleep Mode; Charging; Battery - Nokia NPM-6 Series Manual

System Module and User Interface
13MHz-reference clock is generated in the UPP. VFLASH2 regulator is operating.
In Active mode the RF regulators are controlled by SW writing into EM's registers wanted
settings: VR1A can be enabled or disabled. VR2 can be enabled or disabled and its output
voltage can be programmed to be 2.78V or 3.3V. VR4 -VR7 can be enabled, disabled, or
forced into low quiescent current mode. VR3 is always enabled in Active mode.

Sleep Mode

Sleep mode is entered when both MCU and DSP are in stand–by mode. Sleep is con-
trolled by both processors. When SLEEPX low signal is detected UEM enters SLEEP mode.
VCORE, VIO and VFLASH1 regulators are put into low quiescent current mode. All the RF
regulators are disabled in SLEEP. When SLEEPX=1 detected UEM enters ACTIVE mode and
all functions are activated.
The sleep mode is exited either by the expiration of a sleep clock counter in the UEM or
by some external interrupt, generated by a charger connection, key press, headset con-
nection etc.
In sleep mode VCTCXOr is shut down and 32 kHz sleep clock oscillator is used as refer-
ence clock for the baseband.

Charging

Charging can be performed in any operating mode.
NPM-6 supports the standard NMP charger interface.
Supported chargers are ACP-7, ACP-8, ACP-9, ACP-12, LCH-8 and LCH-9.
Charging is controlled by the UEM ASIC and external components are needed for EMC,
reverse polarity and transient protection of the input to the baseband module. The
charger connection is through the system connector interface. The NPM-6 baseband is
designed to support DCT3 chargers from an electrical point of view. Both 2- and 3-wire
type chargers are supported.
The operation of the charging circuit has been specified in such a way as to limit the
power dissipation across the charge switch and to ensure safe operation in all modes.

Battery

720 mAh Li-ion battery pack BL-4C is used in NPM-6.
Nominal discharge cut-off voltage
Nominal battery voltage
Nominal charging voltage
Maximum charger output current
Minimum charger output current
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ãNokia Corporation.
CCS Technical Documentation
3.1V
3.7V
4.2V
850 mA
200 mA
Issue 1 01/03