Issue 2 06/2005 COMPANY CONFIDENTIAL 7
Copyright © 2005 Nokia. All Rights Reserved.
RH-53/54
8-System Module Nokia Customer Care
Mbus Asynchronous message bus connected to MCU (phone control interface).
Slow message bus for control data.
MCU Micro Controller Unit
NO_SUPPLY UEM state where UEM has no supply what so ever
NTC Negative temperature Coefficient, temperature sensitive resistor used as a
temperature sensor.
PA Power Amplifier (RF)
PDM Pulse Density Modulation
Phoenix SW tool of DCT4.x
PLL Phase locked loop
PnPHF Plug and Play Handsfree
PUP General Purpose IO (PIO), USARTS and Pulse Width Modulators
PWB Printed Wired Board
PWR_OFF UEM state where phone is off
PWRONX Signal from power on key.
R&D Research and development
RESET UEM state where regulators are enabled
RTC UEM internal Real Time Clock
SIM Subscriber Identification Module
SLEEP UEM power saving state controlled by UPP
SPR Standard Product Requirements
SRAM Static RAM
SW Software
TB To Be Defined
TI Texas Instruments, American company
UEM Universal Energy Management
UI User Interface
UPP Universal Phone Processor
VBAT Main battery voltage
VCHAR Charger input voltage
VCHARDET Charger detection threshold level
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