Technical Summary - Nokia RH-9 Series Ccs Technical Documentation

CCS Technical Documentation

Technical Summary

The baseband module contains 2 main ASICs named the UEM and UPP. The baseband
module furthermore contains an audio amplifier LM4890 for MIDI support, a LED driver
LM2795, a 64Mbit Flash IC and a 4Mbit SRAM. The baseband is based on the DCT4
engine program.
PA Supply
RF Supplies
RF RX/TX
SIM
EAR
MIC
LM4890
HF
VIBRA
M
DCT4 Janette connector
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 1.8V. UEM includes 6 linear LDO (low drop-out) regulators for base-
band and 7 regulators for RF. BB regulator VFLASH2, RF regulators VR1B, VR4 as well as
the current sources IPA1 and IPA2 must be kept disabled by SW, as they are left uncon-
nected on the PWB. The UEM is furthermore supplying the baseband SIM interface with a
programmable voltage of either 1.8 V or 3.0 V. The core of the UPP is supplied with a
programmable voltage of 1.0 V, 1.3 V, 1.5 V or 1.8 V.
UPP operates from a 26MHz clock, coming from the RF ASIC MJOELNER, the 26 MHz
Issue 1 11/02
Figure 1: RH-9 baseband block diagram
Battery
Baseband
LM2795
DLIGHT
SLEEPCLK
UEM
Supplies
External Audio
Charger connection
MBus/FBus
ãNokia Corporation
UI Mjoelner
26MHz
32kHz
CBUS/
DBUS
UPP
BB
RH-9
System Module & UI
RFBUS
MEMADDA
FLASH
SRAM
Page 7