Nokia 2600 服务手册
ISSUE 1 09/2004
COMPANY CONFIDENTIAL
11
Copyright © 2004 Nokia. All Rights Reserved.
RH-59/60
7-System Module
Nokia Customer Care
Power_off
In this state the phone is powered off, but supplied. VRTC regulator is active (enabled) having
supply voltage from main battery. Note, the RTC status in PWR_OFF mode depends on wheth-
er RTC was enabled or not when entering PWR_OFF. From Power_off mode UEM enters RE-
SET mode (after 20ms delay), if any of following statements is true (logical OR –function):
supply voltage from main battery. Note, the RTC status in PWR_OFF mode depends on wheth-
er RTC was enabled or not when entering PWR_OFF. From Power_off mode UEM enters RE-
SET mode (after 20ms delay), if any of following statements is true (logical OR –function):
– Power_on button detected (PWROFFX)
– charger connection detected (VCHARDET)
– RTC_ALARM detected
The Phone enters POWER_OFF mode from all the other modes except NO_SUPPLY if internal
watchdog elapses.
watchdog elapses.
Acting dead
If the phone is off when the charger is connected, the phone is powered on but enters a state
called”Acting Dead”, in this mode no RF parts are powered. To the user, the phone acts as if it
was switched off. A battery-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.
called”Acting Dead”, in this mode no RF parts are powered. To the user, the phone acts as if it
was switched off. A battery-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.
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 set-
tings: VR1A/B must be kept disabled. VR2 can be enabled or forced into low quiescent current
mode. VR3 is always enabled in active mode. VR4 -VR7 can be enabled, disabled or forced
into low quiescent current mode.
tings: VR1A/B must be kept disabled. VR2 can be enabled or forced into low quiescent current
mode. VR3 is always enabled in active mode. VR4 -VR7 can be enabled, disabled or forced
into low quiescent current 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, ex-
cept VR2, are disabled in SLEEP. When SLEEPX=1 is detected UEM enters ACTIVE mode
and all functions are activated.
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, ex-
cept VR2, 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 connection
etc.
some external interrupt, generated by a charger connection, key press, headset connection
etc.
In sleep mode the main oscillator (26MHz) is shut down and the 32 kHz sleep clock oscillator
is used as reference clock for the baseband.
is used as reference clock for the baseband.
Charging
Charging can be performed in parallel with any other operating mode. A BSI resistor inside the
battery pack indicates the battery type/size. The resistor value corresponds to a specific battery
capacity and technology.
battery pack indicates the battery type/size. The resistor value corresponds to a specific battery
capacity and technology.
The battery voltage, temperature, size and current are measured by the UEM controlled by the
charging software running in the UPP.
charging software running in the UPP.