Absolute Maximum Ratings; Phone Modes Of Operation - Nokia N72 Service Manual

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USB & modem interface
System components
Peripheral subsystem

Absolute maximum ratings

Signal
Battery voltage (idle)
Battery voltage (Call)
Charger input voltage
Back-Up supply 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.
RESET RESET mode is a synonym for start-up sequence. RESET mode uses 32 kHz clock to count
the REST mode delay (typically 16 ms).
SLEEP SLEEP mode is entered only from PWR_ON mode with the aid of SW when the system's
activity is low. There are in principle three different sleep modes:
• Application processor sleep
• RAP sleep
• Application processor and RAP sleep (deep sleep)
FLASHING FLASHING mode is for SW downloading.
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COMPANY CONFIDENTIAL
Copyright © 2006 Nokia. All rights reserved.
These two modules enable the platform to support
a universal serial link and a dedicated modem
interface, enabling a high data transfer rate
between the modem and the application chip.
System components are group of modules
responsible for managing system interactions such
as interrupt, clock control and idle.
The peripheral subsystem defines all the
components used to interface application processor
with specific external devices such as camera,
keyboard, display, etc.
Uni
Nom Max
t
+4.5 V
+4.3 V
+20 V
2.5 2.6 V
Description
Description
Notes
Battery voltage maximum value is
specified during charging is active
Battery voltage maximum value is
specified during charging is active
Maximum capacity of the backup
power supply assumed to be 10 µAh.
RM-180
System Module
Issue 1