Nokia 6560 Service Manual
RH-25
System Module
CCS Technical Documentation
Page 6
©Nokia Corporation Confidential
Issue 1 10/2003
can rise either by connecting a new battery with VBAT > VMSTR+, or by connecting
charger and charging the battery voltage to above VMSTR+.
charger and charging the battery voltage to above VMSTR+.
Acting DEAD Mode
If the phone powered off when the charger is connected, the phone is powered on and
enters a state called Acting Dead. In this mode, no RF circuitry is powered up. To the user,
the phone acts as if it is switched off. The phone issues a battery-charging alert and/or
shows a battery charging indication on the display to acknowledge to the user that the
battery is being charged.
enters a state called Acting Dead. In this mode, no RF circuitry is powered up. To the user,
the phone acts as if it is switched off. The phone issues a battery-charging alert and/or
shows a battery charging indication on the display to acknowledge to the user that the
battery is being charged.
Active Mode
In 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, etc. In
active mode, SW controls the RF regulators by writing the correct values into the UEM
control registers. VR1A/B can be enabled or disabled. VR2 can be enabled or disabled.
VR4 - VR7 can be enabled, disabled, or forced into low quiescent current mode. VR3 is
always enabled in active mode.
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, etc. In
active mode, SW controls the RF regulators by writing the correct values into the UEM
control registers. VR1A/B can be enabled or disabled. VR2 can be enabled or disabled.
VR4 - VR7 can be enabled, disabled, or forced into low quiescent current mode. VR3 is
always enabled in active mode.
Sleep Mode
The phone enters Sleep mode when both MCU and DSP are in stand-by mode. Both pro-
cessors control sleep. When the SLEEPX low signal is detected, the UEM enters SLEEP
mode. In this mode, the VCORE, VIO and VFLASH1 regulators are put into low quiescent
current mode. All RF regulators — with the exception of VR2 and VR3 — are disabled in
sleep mode. When the SLEEPX is set high and is detected by the UEM, the phone enters
ACTIVE mode and all functions are activated. Sleep mode is exited either by the expira-
tion of a sleep clock counter in the UEM, or by some external interrupt generated by a
charger connection, key press, or headset connection among other things. While in sleep
mode, the main oscillator is shut down and the baseband section uses the 32 kHz sleep
clock oscillator as its reference.
cessors control sleep. When the SLEEPX low signal is detected, the UEM enters SLEEP
mode. In this mode, the VCORE, VIO and VFLASH1 regulators are put into low quiescent
current mode. All RF regulators — with the exception of VR2 and VR3 — are disabled in
sleep mode. When the SLEEPX is set high and is detected by the UEM, the phone enters
ACTIVE mode and all functions are activated. Sleep mode is exited either by the expira-
tion of a sleep clock counter in the UEM, or by some external interrupt generated by a
charger connection, key press, or headset connection among other things. While in sleep
mode, the main oscillator is shut down and the baseband section uses the 32 kHz sleep
clock oscillator as its reference.
Charging Mode
Charging can be performed in parallel with any other operating mode. The Battery Size
Indicator (BSI) resistor inside the battery pack indicates the battery type/size. The resistor
value corresponds to a specific battery capacity and technology. The UEM's AD convert-
ers, under UPP software control, measure the battery voltage, temperature, size, and cur-
rent. The charging control circuitry (CHACON) inside the UEM controls the charging
current delivered from the charger to the battery. The battery voltage rise is limited by
turning the UEM switch off when the battery voltage has reached VBATLim (programma-
ble charging cut-off limits 3.6V / 5.0V / 5.25V). Measuring the voltage drop across a
0.22Ohm resistor monitors charging current.
Indicator (BSI) resistor inside the battery pack indicates the battery type/size. The resistor
value corresponds to a specific battery capacity and technology. The UEM's AD convert-
ers, under UPP software control, measure the battery voltage, temperature, size, and cur-
rent. The charging control circuitry (CHACON) inside the UEM controls the charging
current delivered from the charger to the battery. The battery voltage rise is limited by
turning the UEM switch off when the battery voltage has reached VBATLim (programma-
ble charging cut-off limits 3.6V / 5.0V / 5.25V). Measuring the voltage drop across a
0.22Ohm resistor monitors charging current.
RH-25 BB Functional Blocks
RH-25 BB functional blocks are listed below:
• UEM and UPP