Nokia 8390 Manuales De Servicio
PAMS Technical Documentation
System Module & UI
NSB-8
Issue 1 01/02
ãNokia Corporation
Page 19
Functional Description
Modes of Operation
RM8 baseband engine has five operating modes:
•
No supply
•
Acting Dead
•
Active
•
Sleep
•
Charging
No supply
In NO_SUPPLY mode the phone has no supply voltage. This mode is due to disconnection
of battery or low battery voltage level.
of battery or low battery voltage level.
Phone is exiting from NO_SUPPLY mode when sufficient battery voltage level is detected.
Battery voltage can rise either by connecting a new battery with VBAT > V
Battery voltage can rise either by connecting a new battery with VBAT > V
MSTR+
or by
connecting a charger and charging the battery above V
MSTR+
.
Acting Dead
If the phone is off when the charger is connected, the phone is powered on, but it enters
a state called "Acting Dead". To the user the phone acts as if it was switched off. A bat-
tery charging alert is given and/or a battery charging indication on the display is shown
to acknowledge the user that the battery is being charged.
a state called "Acting Dead". To the user the phone acts as if it was switched off. A bat-
tery charging alert is given and/or a battery charging indication on the display is shown
to acknowledge the user that the battery is being charged.
Active
In the active mode the phone is in normal operation, scanning for channels, listening to
a base station, transmitting and processing information. There are several sub-states in
the active mode depending on if the phone is in burst reception, burst transmission, if
DSP is working etc.
a base station, transmitting and processing information. There are several sub-states in
the active mode depending on if the phone is in burst reception, burst transmission, if
DSP is working etc.
In active mode the RF regulators are controlled by SW writing into UEM'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 or
disabled or forced into low quiescent current mode. VR3 is always enabled in active
mode.
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 or
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 controlled
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 RF regulators
are disabled in SLEEP. When SLEEPX=1 is detected UEM enters ACTIVE mode and all
functions are activated.
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 RF regulators
are disabled in SLEEP. When SLEEPX=1 is 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-
by some external interrupt, generated by a charger connection, key press, headset con-