Phone Modes Of Operation - Nokia E62 Service Manual

RM-88
System Module
Signal
Battery voltage (Call)
Charger input voltage

Phone modes of operation

Mode
NO_SUPPLY (dead) mode means that the main battery is not present or its voltage is too low (below
N2200 master reset threshold) and that the back-up battery voltage is too low.
BACK_UP The main battery is not present or its voltage is too low but back-up battery voltage is
adequate and the 32 kHz oscillator is running (RTC is on).
PWR_OFF In this mode (warm), the main battery is present and its voltage is over N2200 master
reset threshold. All regulators are disabled, PurX is on low state, the RTC is on and the
oscillator is on. PWR_OFF (cold) mode is almost the same as PWR_OFF (warm), but the
RTC and the oscillator are off.
RESET RESET mode is a synonym for start-up sequence. In this mode certain regulators are
enabled and after they and RFClk have stabilized, the system reset (PurX) is released
and PWR_ON mode entered. RESET mode uses 32 kHz clock to count the REST mode
delay (typically 16 ms).
DEEP SLEEP Deep sleep mode is entered only from Pwr_on mode with the aid of sw when the
system's activity is low. At deep sleep, VCTCXO is powering off. System is running with
the sleep clock. Regulators are in sleep mode.
FLASHING FLASHING mode is for SW downloading.
Voltage limits
Parameter Description
Master reset
threshold
VMSTR (N2200)
Master reset
threshold
level, rising
VMSTR+ (N2300)
Master reset
threshold
level, falling
VMSTR- (N2300)
Hardware
cutoff
VCOFF+ (rising)
Issue 1
Min Nom
+3.2
-0.3
Value
2.2V (typ.)
2.1V (typ.)
1.9V (typ.)
2.9V (typ.)
COMPANY CONFIDENTIAL
Copyright © 2006 Nokia. All rights reserved.
Uni
Max
t
+4.8 V Battery voltage maximum value is
specified during charging is active
+16 V
Description
Nokia Customer Care
Notes
Page 8 –7