Power Up By Rtc; Power Up By Ibi; Acting Dead; Active Mode - Nokia Mobile Phones NSE-5 Series Service Manual

NSE–5
System Module
1 2
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..
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PAMS
Technical Documentation
SLEEPX
PURX
CCPURX
PWRONX
VR1,VR6
VBB (2.8V)
Vchar
Issue 1 07/99