NKC-1X
System Module
CCS Technical Documentation
Page 10
Nokia Corporation
Issue 1 02/03
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.
Figure 2: System Block Diagram (simple)
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.
UEM
UPP
EAR
MIC
BUZZER
RF Supplies
BATTERY
PA supply
LCD
CBUS/DBUS
BB Supplies
SLEEPCLOCK
32kHz
FLASH 16Mbit
MEMADDA
MEMCONT
RF IC
RFCLK
19.44MHz
BASEBAND
DCT4 System Connector
EXTERNAL AUDIO
CHARGER CONNECTION
KLIGHT/
DLIGHT
PWR ON
AUDIO
PURX
RFIC CTRL
RF RX/TX
RF RX/TX
Summary of Contents for NKC-1X Series
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