User Guide

CC Technical Documentation System Module

NPM-10 (3595)

Figure 1: NPM-10 (3595) baseband block diagram

The UEM supplies both the baseband module as well as the RF module with a series of

voltage regulators. Both the RF and Baseband modules are supplied with regulated volt-

ages of 2.78 V and 1.8 V. The UEM includes six linear LDO (low drop out) regulators for

baseband and seven regulators for RF, the BB regulator VFLASH1, RF regulators VR1B,

VR4 as well as the current sources (IPA1 and IPA2 must be kept disabled by SW as they

are left disconnected on the PWB). The UEM also supplies the baseband SIM interface

with a programmable voltage of either 1.8 V or 3.0 V. The UPP core is supplied with a

programmable voltage of 1.0 V, 1.3 V, 1.5 V, or 1.8 V.

The UPP operates from a 26 MHz clock, coming from the RF ASIC. The 26 MHz clock is

internally divided by two, to the nominal system clock of 13 MHz.

The UEM contains a real-time clock, developed from the 32.768 MHz crystal oscillator.

The 32.768 MHz clock is fed to the UPP as a sleep clock.

The communication between the UEM and the UPP is done via the bidirectional serial

busses, CBUS and DBUS. The CBUS is controlled by the MCU and operates at a speed

of 1 MHz. The DBUS is controlled by the DSP and operates at a speed of13 MHz. Both

processors are located in the UPP.

The interface between the baseband and the RF section is mainly handled by the UEM

RFBUS

UEM

UPP

FLASH

Battery

CBUS/

DBUS

Supplies

RF Supplies

DCT4 Janette connector

RF RX/TX

PA Supply

MBus/FBus

External Audio

Charger connection

Mjoelner

26MHz

SLEEPCLK

32kHz

Baseband

MEMADDA

VIBRA

EAR

MIC

DLIGHT

SIM

LM4890