User Guide

CCS Technical Documentation 2 - System Module
RH-26
Issue 1 02/04 ©Nokia Corporation Page 9
Baseband
Technical summary
The main functionality of the baseband is implemented into two ASICs:
- UPP (Universal Phone Processor) and
- UEMK Edge (Universal Energy Management)
Figure 1: Baseband block description
Baseband is running from power rails 2.8V analog voltage and 1.8V I/O voltage. UPP core
voltages can be programmed to 1.053V, 1.35V, 1.57V (default) and 1.8V. UEMK includes
a 6-linear LDO (low drop-out) regulator for baseband and 7 regulators for RF. It also
includes 4 current sources for biasing purposes and internal usage. UEMK also includes
SIM interface, which supports both 1.8V and 3V SIM cards.
The baseband architecture supports a power saving function called ”sleep mode”. This
sleep mode shuts off the VCTCXO, which is used as system clock source for both RF and
baseband. During the sleep mode, the system runs from a 32 kHz crystal. The phone is
waken up by a timer running from this 32 kHz clock supply or from external interrupt.
The sleeping time is determined by network parameters. The sleep mode is entered when
both the MCU and the DSP are in standby mode and the normal VCTCXO clock has been
switched off. Bluetooth has its own sleep period that is not aligned with phone sleep.
UEMK
Edge
UPP8Mv3
Combo
Memor
y
FLASH 128Mbit
& utRAM 16MBit
RF-BB Interface
Vibra
Bluetooth
CSR BC02
IHF Amp
LM4890
Battery
BL-5C
SIM
DEMI
1.8 V
IR
LCD
Passive colour STN
System connector
DC
j
ack
Accessory
Regulator
IHF
BU
Led driver
Keyboard &
display
illumination
Camera
CIF
Keyboards
Engine QWERTY
Engine control
k
Flip T9
Flip QWERTY
µ
C
HWA