NHM–7
System Module & UI
PAMS Technical Documentation
Page 8
Issue 1 10/2001
Nokia Corporation
System Module LA5
Baseband Module
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 sys-
tem runs from a 32 kHz crystal. The phone is waken up by a timer run-
ning from this 32 kHz clock supply. The sleep time is determined by net-
work parameters. Sleep mode is entered when both the MCU and the
DSP are in standby mode and the normal VCTCXO clock is switched off.
NHM–7 supports both three and two wire type of Nokia chargers. Three
wire chargers are treated like two wire ones. There is not separate PWM
output for controlling charger but it is connected to GND inside the bottom
connector. Charging is controlled by UEM ASIC (Universal Energy Man-
agement) and EM SW running in the UPP (Universal Phone Processor).
BLB–2 Li–ion battery is used as main power source for the phone.
Block Diagram
UEM
UI
SIM
UPP
BATTERY
PA SUPPLY
RF SUPPLIES
BB SUPPLIES
TX/RX SIGNALS
BASEBAND
VBAT
EXT. AUDIO
IR
32kHz
CLK
13MHz
CLK
SLEEP CLOCK
SYSTEM CLOCK
HS–connector
Charger
connector
RAM
FLASH MEMORY
FM
radio
Digital Control
PWR
UPP ASIC (Universal Phone Processor) provides the MCU, DSP, external
memory interface and digital control functions. UEM ASIC (Universal En-
ergy Management) contains power supply circuitry, charging, audio proc-
essing and RF control hardware.
Содержание NHM-7 series
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