User Guide

NPM-6/6X
System Module and User Interface CCS Technical Documentation
Page 12 Nokia Corporation. Issue 2 06/03
Data transmission between the UEM and the UPP is implemented using two serial bus-
ses, DBUS for DSP and CBUS for MCU. There are also separate signals for PDM coded
audio. Digital speech processing is handled by the DSP inside UPP ASIC.
The UEM is a dual voltage circuit, the digital parts are running from the baseband supply
1.8V and the analog parts are running from the analog supply 2.78V also VBAT is directly
used.
The baseband supports both internal and external microphone inputs and speaker out-
puts. Input and output signal source selection and gain control is performed by the UEM
according to control messages from the UPP. Keypad tones, DTMF, and other audio tones
are generated and encoded by the UPP and transmitted to the UEM for decoding. An
external vibra alert control signals are generated by the UEM with separate PWM out-
puts.
NPM-6/6X has two serial control interfaces: FBUS and MBUS. FBUS can be accessed
through a test pad and the System Connector as described later. The MBUS can be
accessed through the production test pattern as described in section MBUS Interface.
Note! NPM-6 uses 64Mbit flash memory and external 4MBit SRAM memory. NPM-6X uses
COMBO memory including 64MBit flash memory and 4Mbit SRAM.
EMC shielding is implemented using a metallized plastic frame. On the other side, the
engine is shielded with PWB grounding.
DC Characteristics
Regulators and Supply Voltage Ranges
Absolute Maximum Ratings
Battery Voltage Range
Signal Note
Battery Voltage (Idle) -0.3V - 5.5V
Battery Voltage (Call) Max 4.8V
Charger Input Voltage -0.3V - 16V
Signal Min. Nom Max Note
VBAT 3.1V 3.7V 4.2V (charging
high limit voltage)
3.1V SW cut off