User Guide

PAMS Technical Documentation 2 - Broadband System
NPE-4
Original ãNokia Corporation. Page 2-5
Introduction
This Chapter specifies the baseband module for the NPE-4 program. The baseband mod-
ule includes the baseband engine chipset, The UI components and the acoustical parts
for the transceiver.
NPE-4 is a hand-portable GSM900/GSM1800 phone for the classic segment, having the
DCT4 generation baseband- and RF circuitry. The key drivers for this product are GPRS
data transmission and short time to market.
The mechanical solution is based on the NPE-3 phone, modified with a new A-cover
design. The acoustical design is very similar to that implemented in NPE-3.
NPE-4 is having the DCT3 system connector and supports accordingly most DCT3 acces-
sories. The battery interface is the one known from DCT3 phones and NPE-4 will support
both Nickel- and Lithium batteries.
New features in NPE-4 project is Bluetooth wireless data and audio connection and
GPRS for TCP/IP protocol data transmission.
Abbreviations
BSI Battery Size Indicator
NO_SUPPLY UEM state where UEM has no supply what so ever
VBAT Main battery voltage
V
MSTR+
, V
MSTR-
Master Reset threshold level (2.1 V / 1.9 V)
VBACK Backup battery voltage
V_BU
COFF+
, V_BU
COFF-
Backup battery threshold level (3.1 V / 2.8 V)
BACK_UP UEM state where UEM has backup voltage
RESET UEM state where regulators are enabled
RTC UEM internal Real Time Clock
VRTC Regulator voltage for RTC
PWR_OFF UEM state where phone is off
SLEEP UEM power saving state controlled by UPP
SLEEPX SLEEP control signal from UPP
PWRONX Signal from power on key. '1' = key pressed.
VCHAR Charger input voltage
VCHAR
DET
Charger detection threshold level
UEM Universal Energy Management
UPP Universal Phone Processor
IMD In-Mould Decoration