User Guide

Figure 67 Functional block diagram

The application processor takes care of processing application SW and handles the UI SW. It consists of

OMAP3.3 and peripheral subsystems like display- and keyboard driver blocks.

Absolute maximum ratings

Signal Min Nom Max Unit Notes

Battery voltage (idle) -0.3 +4.5 V Battery voltage maximum value is

specified during charging is active

Battery voltage (Call) +3.2 +4.3 V Battery voltage maximum value is

specified during charging is active

Charger input voltage -0.3 +20 V

Back-Up supply voltage 0 2.5 2.6 V Maximum capacity of the backup

power supply assumed to be 10 µAh.

Phone modes of operation

Mode Description

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).

RM-49

Nokia Customer Care System Module

Page 8 –6 COMPANY CONFIDENTIAL Issue 1