Nokia N81 Service Manual

• 32.768kHz clock with external crystal
• Real time clock with external backup battery
• SIM card interface
• Stereo audio codecs and amplifiers
• A/D converter
• Regulators
• Vibra interface
• Digital interface (CBUS)
EMC ASIP (Appcation Specified Integrated Passive) have been integrated inside the ASIC. It includes biasing
passives for microphone , EMC filter for SIM, microphones etc.
Combo memory
The application memory of the device consists of NAND/DDR combo memory. The stacked DDR/NAND
application memory has 768 Mbit of DDR memory and 1 Gbit of flash memory.
Audio concept
Audio HW architecture
The functional core of the audio hardware is built around the two ASICs Rapido engine and mixed signal ASIC
AVILMA.
AVILMA provides an interface for the transducers and accessory connector. Integrated handsfree stereo
speakers are driven by a Class-D audio amplifier TPA2012D2 (second source LM4674A). An audio DAC AIC33
and audio amplifier TPA6130A2 (or second source TS4601) are used to supply HiFi audio signals to external
headphone/headset.
The audio transducers are:
• Dynamic earpiece (located on slider)
• Two dynamic speakers
• Digital microphone
In addition to the audio transducers, AVILMA also provides an output for the dynamic vibra component.
All galvanic audio accessories are connected to AV accessory connector.
A Bluetooth audio and FM-radio module, connected to Rapido, AVILMA and AIC33 supports Bluetooth audio
and radio functionality.
RM-179; RM-223
System Module and User Interface
Issue 1 COMPANY CONFIDENTIAL Page 6 –33
Copyright © 2007 Nokia. All rights reserved.

Nokia N81 Specifications

General

Display diagonal	2.4 \
Display resolution	240 x 320 pixels
Display number of colors	16.78 million colors
Ringer type	Polyphonic
Internal memory	8196 MB
Front camera type	Single camera
Rear camera resolution	1600 x 1200 pixels
Personal info management (PIM)	Alarm clock, Calculator, Calendar, Notes, To-do list
Headphone connectivity	3.5 mm
USB 2.0 ports quantity	1
Text prediction system type	T9
Multimedia Messaging Service (MMS)	Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network
Form factor	Slider
Product color	Brown
Gaming time	6 h
Browsing time	5 h
Talk time (2G)	4 h
Talk time (3G)	3 h
Battery capacity	1050 mAh
Standby time (2G)	1020 h
Continuous audio playback time	11.5 h
Continuous video playback time	4.5 h
2G standards	GPRS
Data network	wcdma
Bluetooth version	2.0+EDR
Bluetooth profiles	A2DP, BIP, DUN, FTP, GAP, GOEP, HFP, HSP, OPP, SPP
SIM card capability	Single SIM

Weight and Dimensions

Depth	102 mm
Width	50 mm
Height	17.9 mm
Weight	140 g