PAMS Technical Documentation
System Module
NSB-5
Issue 1 03/01
Nokia Mobile Phones Ltd.
Page 23
1: Power switch pressed ==> Digital voltages on in CCONT (VBB).
2: CCONT digital reset released. VCXO turned on.
3: 62 ms delay to see if power switch is still pressed.
Power Up by RTC
RTC ( internal in CCONT) can power the phone up by changing RTCPwr to logical ”1”.
RTCPwr is an internal signal from the CCONT digital section.
Power Up by IBI
IBI can power CCONT up by sending a short pulse to logical ”1”. RTCPwr is an internal
signal from the CCONT digital section.
Acting Dead
If the phone is off when the charger is connected, the phone is powered on but enters a
state called ”acting dead”. 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 Mode
In the active mode the phone is in normal operation, scanning for channels, listening to
a base station, transmitting and processing information. All the CCONT regulators are
operating. There are several substates in the active mode depending on if the phone is in
burst reception, burst transmission, if DSP is working etc.
Sleep Mode
In the sleep mode all the regulators except the baseband VBB, Vcore, and the SIM card
VSIM regulators are off. Sleep mode is activated by the MAD2WD1 after MCU and DSP
clocks have been switched off. The voltage regulators for the RF section are switched off
VBB (2.8V)
CCPURX
PURX
Vchar
1 2
3
VR1,VR6
SLEEPX
PWRONX