Engine Module; Baseband Module; Uem; Introduction To Uem - Nokia NKC-1X Series Technical Documentation Manual

NKC-1X
System Module

Engine Module

Baseband Module

The core part of the transceiver's baseband (see the figure below) consists of 2 ASICs, the
UEM and UPP, and flash memory. The following sections illustrate and explain these
parts in detail.
RF IC
RFCLK
RFIC CTRL
19.44MHz
UPP
MEMADDA
MEMCONT
FLASH 16Mbit
LCD

UEM

Introduction to UEM

UEM is the Universal Energy Management IC for digital hand portable phones. In addi-
tion to energy management, it performs all the baseband's mixed-signal functions.
Most UEM pins have 2kV ESD protection, and those signals considered to be more easily
exposed to ESD, have 8kV protection within the UEM. These kinds of signals are (1) all
audio signals, (2) headset signals, (3) BSI, (4) Btemp, (5) Fbus and (6) Mbus signals.
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Figure 2: System Block Diagram (simple)
RF Supplies
RF RX/TX
PURX
RF RX/TX
SLEEPCLOCK
32kHz
CBUS/DBUS
AUDIO
BB Supplies
KLIGHT/ DLIGHT
PWR ON
BASEBAND
Nokia Corporation
CCS Technical Documentation
UEM
EXTERNAL AUDIO
CHARGER CONNECTION
DCT4 System Connector
PA supply
BATTERY
EAR
MIC
BUZZER
Issue 1 02/03