LG GB195 User manual

1
GB195
Service Manual
LG Electronics

2
Table Of Contents
1. INTRODUCTION…………………...3
1.1 Purpose…………………………………3
1.2 Regulatory Information………………...3
2. PERFORMANCE…………………...5
2.1 H/W Features…………………………...5
2.2 S/W Features…………………………...6
3. TECHNICAL BRIEF………………18
3.1 Digital Main Processor( MT6223 )……….18
3.2 Power Amplifier Module( SKY77518 )…....25
3.3 Transceiver Module( AD6548 )…………..26
3.4 Memory Module ( PF38F4050M0Y0CG) …….28
3.5 FM Radio Module (Si4708)…………..32
3.6 Antenna Switch Module ( B9308 )………34
3.7 Camera Module (AIT706X)…………..35
3.8 LCD Interface……………………….…39
3.9 SIM& Micro SD Card Interface…..…..42
3.10 KEYPAD Interface …………………..43
3.11 Battery Charging Block Interface…..44
3.12 Audio Interface……………….….…..45
3.13 Vibrator Interface….………………...47
3.14 Key LED Interface…………………..48
4. TROUBLE SHOOTING…………..49
4.1 Power On Trouble…………………….49
4.2 SIM Card Trouble……………………..54
4.3 Vibrator Trouble……………………….56
4.4 Keypad Trouble……………………….58
4.5 RTC Trouble…………………………...60
4.6 Key Backlight Trouble………………...62
4.7 LCM Backlight Trouble……………….64
4.8 LCM Trouble……………….………….66
4.9 Microphone Trouble…………………..68
4.10 Receiver Trouble…………………….70
4.11 Speaker Trouble……………………..72
4.12 Headphone Trouble…………………74
4.13 Charging Trouble…………………….78
4.14 FM Radio Trouble…………………79
4.15 Camera Trouble……………………81
4.16 Micro SD Trouble………………….84
4.17 RF Trouble…………………………86
5. DOWNLOAD……………….….98
5.1 Download setup………………….98
5.2 Download Process………………99
6. BLOCK DIAGRAM…………..107
7. CIRCUIT DIAGRMA…………108
8. BGA IC PIN Check…………..117
9. PCB LAYOUT…………………120
10.ENGINEERING MODE……..122
11. CALIBRATION……………...126
11.1 Test Equipment Setup………...126
11.2 Calibration Steps………………127
12. STAND ALONE TEST……..166
12.1 Test Configuration…………….166
12.2 META tool Install process…….167
12.3 Rx Test…………………………171
12.4 Tx Test…………………………173
13. EXPLODED VIEW&
REPLACEMENT PART LIST…175
13.1 Exploded View………………..175
13.2 Replacement Part list……..….177

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1. INTRODUCTION
1.1Purpose
This manual provides information necessary to repair, description and download the
features of this model.
1.2 Regulatory Information
A. Security
Toll fraud, the unauthorized use of telecommunications system by an unauthorized part(for
example ,persons other than your company’s employees, agents, subcontractors, or person
working on your company’s behalf) can result in substantial additional charges for your
telecommunications services.
System users are responsible for the security of own system. There are may be risks of
toll fraud associated with your telecommunications system. System users are responsible for
programming and configuring the equipment to prevent unauthorized use .The manufacturer
dose not warrant that this product is immune from the above case but will prevent
unauthorized use of common-carrier telecommunications service of facilities accessed
through or connected to it.
The manufacturer will not be responsible for any charges that result from such
unauthorized use.
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and
possibly causing harm or interruption in service to the telephone network, it should
disconnect telephone service until repair can be done. A telephone company may
temporarily disconnect service as long as repair is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or
procedure. If these changes could reasonably be expected to affect the use of the this phone
or compatibility with the network, the telephone company is required to give advanced written
notice to the user, allowing the user to take appropriate steps to maintain telephone service.
D. Maintenance Limitations
Maintenance limitations on this model must be performed only by the manufacturer or its
authorized agent . The user may not make any changes and/or repairs expect as specifically
noted in this manual.
Therefore, note that authorized alternations or repair may affect the regulatory status of
the system and may void any remaining warranty.
E. Notice of Radiated Emissions
This model complies with rules regarding radiation and radio frequency emission as
defined by local regulatory agencies. In accordance with these agencies, you may be
required to provide information such as the following to the end user.

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F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may
look slightly different.
G. Interference and Attenuation
Phone may interfere with sensitive laboratory equipment, medical equipment, etc.
Interference from unsuppressed engines or electric motors may cause problems.
H. Electrostatic Sensitive Devices
ATTENTION
Boards, which contain Electrostatic Sensitive Devices(ESD),are indicated by the
sign .
Following information is ESD handing:
. Service personnel should ground themselves by using a wrist strap when exchange system
boards.
.When repairs are made to a system board , they should spread the floor with anti-static mat
which is also grounded .
.Use a suitable, grounded soldering iron .
. Keep sensitive parts in these protective packages until these are used.
.When returning system boards or parts like EEPROM to the factory, use the protective
packages as
described.

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2. PERFORMANCE
2.1 H/W Features
Solution MT6223C + AIT706X(144pin) Media Tek / AIT
Form Factor Bar type
Dimension (mm) 104 x 46 x 13.95
RF Band Dual Band 900/1800 or Dual Band
850/1900 Internal Antenna
Data GPRS Class 10
Main Display 1.5” TFT 262K color, 128x
128 Pixels
(HW)
Battery 950 mAh Same as LG6/7
Camera Yes (CMOS VGA Sensor) Same as
KG195/199
Video player
Yes
Video Recorde
r Yes Encode
H.263+AMR
Audio player
Yes MP3/AAC/(AAC+
w/o DRM)
FM Receiver Yes , US/Europe
band(87.5~108MHz)
Embedded FM antenna Yes
Loud Speaker Yes
Memory Size 256Mb NOR Flash +64Mb PSRAM
User Memory Yes 4M Bytes
Memory Card Yes Micro SD
Scheduled FM recording Yes
FM as alarm Yes
Video recording
Yes (H.263 QCIF: Encode & Decode
30fps)
Audio player
--real resuming Yes For MP3 only
Bluetooth No
USB Yes Slave 2.0 full
speed
IrMC No
WAP Yes
V2.0
DRM Yes OMA DRM v1.0
Dictionary No
Music Equalizer Yes (8 types, normal, classic, jazz,
pop, rock, bass3, bass9, loudness) W/ AIT706X
Image Editing No
In flight mode Yes

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2.2 S/W Features
2.2.1 General Features
Function Target Specification Parameter Support
RSSI (7 Level, 0~6) Y
Battery Indicator (4 Level, 0~3) Y
Icons Indicator Y
Basic Display
Others reference to "Phone Personalization
Setting"
Y
Speech Codec FR/EFR/HR/AMR Y
Number of Keys: 21Key (include 12
alphanumeric/number keys (0-9,#,*), 4
function keys, 5 way navigation keys)
Y
Clear key N
Keypad
International Access (+)(long 0) Y
User Selectable and Customizable Profiles
(6 profiles : General, Meeting, Outdoor,
Vibrate only, Headset, Silent)
Y
Auto-detect and activated profiles (1
profile: Headset)
Y
Key Tone
Key Tone Volume (7 Level - 0 ~ 6, 0 for
Mute)
Y
Key tone setting (4 sets: Silent, Click,
Tone, English Human voice)
Y
Ring Tone
Ring Tone Volume (7 Level - 0 ~ 6, 0 for
Mute)
Y
Built-in Ring Tone Pattern: 20 Y
Customizable Ring Tone Link: 5 Y
Intelligent Call Alert
Digits To Sound Synthesizing Y
Alert Type
6 Types - Ring, Vibration Only, Vibration
and Ring, Ring after vibration, Light Only,
Beep Once
Y
Power On Tone
Built-in Ring Tone Pattern: 5 (include
Silent)
Y
Power Off Tone
Built-in Ring Tone Pattern: 5 (include
Silent)
Y
Message Tone
Built-in Ring Tone Pattern: 6 (include
Silent)
Y
User Profile
(Audio Settings)
Follow common
UI
Warning Tone

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Function Target Specification Parameter Support
Built-in Ring Tone Pattern:
1 (Only On/Off operation)
Y
Error Tone
Built-in Ring Tone Pattern:
1 (Only On/Off operation)
Y
Camp On Tone
Built-in Ring Tone Pattern:
1 (Only On/Off operation)
Y
Connect Tone
Built-in Ring Tone Pattern:
1 (Only On/Off operation)
Y
Status LED N
Charger-in Status LED Y
Answer Mode Y
Any Key Answer Y
Auto (Only available for headset mode
while headset plugged in)
Y
Calendar - Month view only Y
Personal Information
Management To do list - 6 fields (Date, Start time, End
time, Note, Alarm, Repeat)
Y
Alarm
3 sets of Alarm Y
4 major fields for each set - On/Off, Time,
Repeat type, Audio option
Y
World Clock
Cities list: China(49),IND(51),CIS(65)
cities
Y
Daylight saving time support: activated by
user selection
Y
Home city set Y
Calculator
Addition, Subtraction, Multiplication,
Division
Y
Unit Converter
Weight, Length Y
Currency Converter
Health Y
Tools and Utilities
Follow common
UI
BMI, Menstrual Y
Greeting Text Y
Shortcuts Y
Flight Mode Y
Time and Date Setting Y
Phone
Personalization
Setting
Wallpaper Y

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Function Target Specification Parameter Support
Screen Saver Y
Power On Animation Y
Power Off Animation Y
LCD Backlight Y
PLMN/Service Indicator (Display of
PLMN Name/Service Provider Name from
SIM)
Y
Date Time Display Y
Own Number Display Y
Restore Factory Default Setting Y
Security Phone Lock Y
Engine
T9 Y
Support Language
Depends on customer and market
requirement.
Total supported languages will be limited
to memory condition.
Y
Input Method
Predictive word input Y
2 embedded game YGame
Settings:
BGM, Sound Effect, Vibration
Y
2.2.2 Networking Features
Function Target Specification Parameter Support
GPRS GPRS Multi slot Class 10 Y
Data Service BS 24 - 26 (2400-9600 bit/s),
asynchronous, non-transparent, UDI.
CSD rate up to 9.6K bit/s
Y
Last Dialed Number : 50 Y
Last Received Number : 50 Y
Last Missed Number : 50 Y
Call History
Scratch Pad Memory(Save an input
number in call) : 1
Y
Last Call Time Y
Total Dialed Call Time Y
Total Received Call Time Y
Last Call Cost Y
Total Cost Y
Max Cost Y
Call Cost
Price Per Unit Y

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Function Target Specification Parameter Support
Last Sent (unit in Byte) Y
Last Received (unit in Byte) Y
All Sent (unit in Byte) Y
GPRS Counter
All Received (unit in Byte) Y
Call Swap Y
Call Retrieve Y
Automatic Redial Y
Speed Dialing Y
Call Management
Last Number Redial Y
Call Hold Y
Call Waiting Y
Calling Line Identity Presentation Y
Calling Line Identity Restriction Y
Connected Identification Restriction Y
Call Divert All voice Calls Y
Call Divert if unreachable Y
Call Divert if no answer Y
Call Divert if busy Y
Call Divert all data calls Y
Cancel all divert Y
Call Barring All Outgoing Calls Y
Call Barring All Outgoing International
Calls
Call Barring All outgoing International
except home
Y
Call Barring All incoming Calls Y
Call Barring All incoming Calls when
roaming
Y
Multi-party Call (up to 7 calls, 5 in
conference, 1 on held, 1 waiting)
Y
Call
Related Supplementa
ry Services
Line switching (Line1, Line2)
Call reminder (Off, Single, Periodic)
Closed User Group
Y
Quick Search (Notice: Quick search
function only works in Phonebook, SMS
and MMS. In other application, this phone
supports regular search.)
Y
Alpha Store and Recall Y
Access Phone Book in call Y
Copy & Move Y
Fixed Dial Number Y
Service Dial Number Y
Phone Book
Speed Dial Number Y

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Function Target Specification Parameter Support
SOS Number Y
Entry : 1000 names (11 fields – Name,
Mobile, Home, Company name, Email
address, Office number, Fax number,
Birthday, Associate Picture, Associate
Sound, Caller group)
Y
Caller Group-5 caller group- Friends,
Family, VIP, Business, Others (5 fields –
Name, Ring, Picture, LED pattern,
Member list)
Y
Own Numbers: User can change the own
numbers of handset. (Sets of own numbers
depends on SIM)
Y
vCard: (Edit, Send and Receive. 7 fields –
Name, Mobile, Home, Company Name,
Email Address, Office Number, Fax
Number)
Version 2.1 Y
Note: This phone doesn’t support phone
number search.
Y
SMS Y
Standard SMS Y
SMS Reply Path Y
SMS Delivery Report
Valid period (1 hour/12 hours/1 day/1
week/Maximum)
Message Type (Text, Fax, Page,
Email) Message Indication Type refer
to GSM 03.40
Y
Basic text-
only SMS as described in 3GPP
TS 23.040 R5
Y
Notice: This phone doesn’t support video
ring tone via SMS
Y
SMS Character Sets Support
GSM7 Y
UCS-2 Y
EMS
EMS Standard as described in 3GPP TS
23.040 R5 excluding WVG
Y
EMS Text Format
Text Style : Normal, Bold, Italic,
Underlined, Strikethrough
Y
Text Alignment : Left, Right, Center Y
Text Size : Normal, Large, Small Y
Message
EMS Image Support

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Function Target Specification Parameter Support
1-bit small image 16x16 pixels black and
white
Y
1-bit large image 32x32 pixels black and
white
Y
1-bit variable image in single SMS packet
Y
Extended black and white 1-bit image up
to 255x255 pixels
Y
Extended 6-bit image up to 255x255 Y
Pre-defined animation Y
User-defined small animation 8x8 pixel
4-frame black and white
Y
User-defined large animation 16x16 pixel
4-frame black and white
Y
Pre-defined sound Y
User-defined i-Melody up to 128 bytes Y
LZSS compression algorithm Y
Re-use extended object Y
Object Distribution Y
User Prompt Indicator Y
Hyperlink format element Y
Extended Object Distribution Y
EMS Character Sets Support Y
GSM7 Y
UCS-2 Y
EMS Miscellaneous Y
SMS Concatenation ( 8 Segments for
MT/MO)
Y
SMS Compression Y
MMS Y
MMS Standard as described in 3GPP TS
23.140 V4.8.0
Y
Extract media from Message Y
Insert Media into message Y
OTA provisioning partially support
(Network Profile setting
Y
Auto download mode Y
Manual download mode Y
Operator can pre-configure the delivery
mode
Y
MMS notification with icon or Pop-up
message display)
Y
MMS Message Format Y

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Function Target Specification Parameter Support
MMS SMIL (A subset of SMIL descried
in the MMS Conformance Document 1.2)
Y
MMS Character Sets Support Y
US-ASCII Y
Unicode Y
ISO-8859-1 Y
UTF-16 Y
UTF-8 Y
MMS Images Support Y
WBMP Wireless bitmap Y
GIF87 Y
GIF89a Y
JPEG (sw decode) Y
MMS Sound Formats Support Y
WAV Y
AMR Y
MIDI Y
MP3 Y
MMS Miscellaneous Y
Multipart binary MIME Y
Storage Y
Separated Inbox folder for SMS and MMS
Y
Separated Outbox folder for SMS and
MMS
Y
Total 300 SMS in the storage of phone
plus SIM including Inbox, outbox, sent
and draft
Y
Total 100 MMS in the phone storage
including Inbox, draft and Outbox
Notice: Total MMS count need depends
on user memory space.
Y
Common Operation Y
Write Message Y
Read Message Y
Edit Message
(For MMS, Edit only conformance
messages, unknown media not supported,
unknown SMIL not supported)
Y
Reply Message Y
Send Message Y
Delete Message Y
Forward Message Y

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Function Target Specification Parameter Support
Use Sender's Number Y
Message Templates Y
Extract media from Message (MMS/EMS)
Y
Store Media (MMS/EMS) Y
Delete Media (MMS/EMS) Y
Read Cell Broadcast Y
Cell Broadcast Mode: Receive On/Off Y
Cell Broadcast Message Language Y
Cell Broadcast
Channel Setting Y
Automatic Network Selection Y
Manual Network Selection Y
Network Service Status Y
Preferred Network (User definition) Y
Network
GPRS connection mode selection:
Always, When Needed
Y
Common Operation Y
SIM Application Toolkit (Release 99 Class
2 certified)
Y
Prepaid SIM operation Y
Security Y
PIN Y
SIM
Personalization (Service provider lock,
Network lock)
Y
DTMF Signaling YDTMF
DTMF Enable & Disable Y
2.2.3 Multimedia Features
Function Target Specification Parameter Support
Image size:
120X160, 160X120, 320X240, 640X480
Y
Continuous Shot:
9 shot, 5 shot, 3 shot, OFF Y
Zoom: 1x ~ 4x Y
Image Quality:
High, Normal, Low
Y
White Balance:
Auto, Daylight, Tungsten, Fluorescent,
Cloud, Incandescence
Y
Shot: Three Shot Sounds Y
EV: -4 ~+4 Y
Camera
Screen Mode:
Auto, Night
Y

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Function Target Specification Parameter Support
Banding: 60Hz/50Hz Y
Effect settings: (Total 14 types)
Normal, Grayscale, Sepia, Sepia Green,
Sepia Blue,
Color Invert, Gray Invert, Blackboard,
Whiteboard,
Copper Carving, Blue Carving,
Embossment, Contrast, Sketch
Y
No. of the Stick Frames: 3
Frame 1, Frame 2, None
Stick Frame Only can be used while image
size is 240WX320H
Y
Storage Selection:
Phone, Memory card
(Only available when external memory card
supported)
Y
Delay timer:
Off/ 5/ 10/ 15 Sec
Y
Thumbnail supported Y
Browse Style:
List, Matrix
Y
View Y
Forward:
To Wallpaper, Phonebook, Screen Saver,
Power On Display, Power Off Display,
MMS
Remove the BT. Y
Rename Y
Delete Y
Delete All Y
Sort:
By Name, Type, Time, Size, None
Y
Storage Selection:
Get list from Phone, Memory card
(Onl
y available when external memory card
supported)
Y
Image Format Support
JPEG Baseline Y
GIF87a Y
GIF89a Y
WBMP Y
Image Viewer
BMP Y
Play Y
Pause Y
Music Player
(follow common
UI)
Resume Y

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Function Target Specification Parameter Support
Stop Y
Next Y
Previous Y
Storage Selection:
Get list from Phone, Memory card
(Only available when external memory card
supported)
Y
Auto-Generate Playlist Y
Skin: 2 skins Y
Repeat Mode:
Off, One Song, All Songs
Y
Shuffle Play Y
Background Play Y
Equalizer Setting: 8 sets
Normal, Bass, Dance, Classical, Treble,
Party, Pop, Rock
Y
Volume Control:
7 level (0 ~ 6, 0 for Mute)
Y
Playlist Edit:
Add, Remove, Remove All
Y
Sound Format Support Y
MP3 Y
AMR Y
MIDI Y
WAV Y
AAC Y
Play Y
Pause Y
Stop Y
Speed Control:
X1, X2, X4, X8, X1/2
As AIT update, AIT706
can support the Video F
F function with 8X spee
d. But If the video strea
m(file size) is too short t
hen this 8X speed funct
ion would let the video
play function jump to th
e end quickly
Y
Forward:
To Phonebook, Screen Saver, Power On Anima
tion, Power Off Animation, MMS
Remove the BT. Y
Rename Y
Delete Y
Video Player
Delete All Y

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Function Target Specification Parameter Support
Sort:
By Name, Type, Time, Size, None
Y
Storage Selection:
Get list from Phone, Memory card
Only Memory Card Y
Volume Control:
7 level (0 ~ 6, 0 for Mute)
Y
Image Quality:
High, Normal, Low
Y
White Balance:
Auto, Daylight, Tungsten, Fluorescent,
Cloud, Incandescence
Y
Mode:
Standard, MMS
Y
EV: -4 ~+4 Y
Screen Mode:
Auto, Night
Y
Banding: 60Hz/50Hz Y
Effect settings: (Total 14 types)
Normal, Grayscale, Sepia, Sepia Green,
Sepia Blue,
Color Invert, Gray Invert, Blackboard,
Whiteboard,
Copper Carving, Blue Carving,
Embossment, Contrast, Sketch
Y
Audio On/Off Y
Recorder Format: H.263, 3gpp Y
Video Recorder
Storage Selection:
Phone, Memory card
(Only available when external memory card
supported)
Only Memory Card Y
Storage Selection:
Phone, Memory card
(Only available when external memory card
supported)
Y
Encode Format:
AMR
Y
Record Y
Pause Y
Resume Recording Y
Sound Recorder
Stop Y
Edit Y
Play Y
Melody Compose
(TBD)
Save Y

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Function Target Specification Parameter Support
Instrument Selection: 10 types
Piano, Guitar, Violin, Saxophone, Steel
Drums, Flute, Harmonica, Trumpet, Music
Box, Xylophone
Y
Play Speed:
Fast, Normal, Slow
Y
[Notice] Melody composer only support one
instrument in one melody file, so the last chosen
instrument will be used to play this melody file
Y
Frequencies: 87.5 ~ 108.0
Skin: 2 skins
Y
User definable Preset Channel List Y
Channel Auto Search Y
Background Play Y
Record Y
Record Format:
AMR
Y
Record Storage:
Phone memory, SD card (Option, follow
common UI)
(Only available when external memory card
supported)
Only Memory Card Y
FM Radio
Preset Channel List generated by auto
search
Y
2.2.4 Connectivity Features
Function Target Specification Parameter Support
WAP 2.0 Spec. Y
WAP Push OTA/Message Y
WAP Provisioning Service Y
CSD/GPRS data connection Y
Bookmark Y
Wireless Telephony Application (WTA)
support:
Only Public WTA support, supported
functions listing below -
* Make a telephone call
* Send a string of DTMF tones over an
established voice connection
* Add an entry to the telephone book of
the device
Y
WAP
Supports WML, WCSS, XHTML mp Y
Mass Storage Device YUSB
Virtual COM (PCSync) Y

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3.TECHNICAL BRIEF
3.1 Digital Main Processor
Figure.3-1-1 MT6223 FUNCTIONAL BLOCK DIAGRAM

-19-
3.1.1 System overview
MT6223 is an entry level chipset solution with class 12 GPRS/GSM modem. It integrates only
only analog baseband but also power management blocks into one chip and can greatly reduce
the component count and make smaller PCB size. Besides, MT6223 is capable of SAIC (Single
Antenna Interference Cancellation) and AMR speech. Based on 32 bit ARM7EJ-STM RISC
processor, MT6223 provides an unprecedented platform for high quality modem performance.
Platform
MT6223 runs the ARM7EJ-STM RISC processor at up to 52Mhz, thus providing best
trade-off between system performance and power consumption.
For large amount of data transfer, high performance DMA (Direct Memory Access) with
hardware flow control is implemented, which greatly enhances the data movement speed while
reducing MCU processing load.
Targeted as a modem-centric platform for mobile applications, MT6223 also provides
hardware security digital rights management for copyright protection. For further safeguarding,
and to protect manufacturer’s development investment, hardware flash content protection
is also provided to prevent unauthorized porting of software load.
.
Memory
MT6223 supports up to 4 external state-of-the-art devices through its 8/16-bit host interface.
Devices such as burst/page mode Flash, page mode SRAM, and Pseudo SRAM are supported.
For greatest compatibility, the memory interface can also be used to connect to legacy devices
such as Color/Parallel LCD, and multi-media companion chip are all supported through this
interface. To minimize power consumption and ensure low noise, this interface is designed for
flexible I/O voltage and allows lowering of supply voltage down to 1.8V. The driving strength is
configurable for signal integrity adjustment. The data bus also employs retention technology to
prevent the bus from floating during turn over.
Multi-media
MT6223 utilize high resolution audio DAC, digital audio, and audio synthesis technology to
provide superior audio features., e.g. MP3 ring tone. For MT6223C, MP3 player is also
supported.
Connectivity, and Storage
MT6223 supports UART as well as Bluetooth interface. Also, necessary peripheral blocks are
embedded for a voice centric phone: Keypad Scanner with the capability to detect multiple key
presses, SIM Controller, Alerter, Real Time Clock, PWM, Serial LCD Controller, and General
Purpose Programmable I/Os.
Furthermore, to provide more configuration and bandwidth for display, an additional 9-bit
parallel interface is incorporated.
For MT6223C, memory card control is provided through LCD interface, including SD and mini
SD, etc. Therefore high quality MP3 playback of 48kHz sampling with 320kbps format can be
supported
Audio
Using a highly integrated mixed-signal Audio Front-End, architecture of MT6223 allows for
easy audio interfacing with direct connection to the audio transducers. The audio interface
integrates D/A and A/D Converters for Voice band, as well as high resolution Stereo D/A
Converters for Audio band. In addition, MT6223 also provides Stereo Input and Analog Mux.
MT6223 also supports AMR codec to adaptively optimize speech and audio quality.

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Radio
MT6223 integrates a mixed-signal Baseband front-end in order to provide a well-organized
radio interface with flexibility for efficient customization. It contains gain and offset calibration
mechanisms, and filters with programmable coefficients for comprehensive compatibilitycontrol
on RF modules. This approach also allows the usage of a high resolution D/A Converter for
controlling VCXO or crystal, thus reducing the need for expensive TCVCXO.
MT6223 achieve great MODEM performance by utilizing 14-bit high resolution A/D Converter
in the RF downlink path. Furthermore, to reduce the need for extra external current-driving
component, the driving strength of some BPI outputs is designed to be configurable.
Debug Function
The JTAG interface enables in-circuit debugging of software program with the ARM7EJ-S
core. With this standardized debugging interface, MT6223 provides developers with a wide set
of options in choosing ARM development kits from different third party vendors.
Low Power Features
MT6223 offers various low-power features to help reduce system power consumption. These
features include Pause Mode of 32KHz clocking at Standby State, Power Down Mode for
individual peripherals, and Processor Sleep Mode.
In addition, MT6223 are also fabricated in advanced low leakage CMOS process, hence
providing an overall ultra low leakage solution.
Power Management
MT6223 integrates all regulators that a voice-centric phone needs. Seven LDOs optimized for
Specific GSM/GPRS baseband sub-systems are included, and a RF transceiver needed LDO is
also built-in. Besides Li-Ion battery charge function, SIM card level shifter interface, two
open-drain output switches to control the LED and vibrator are equipped. Other power
management schemes such as thermal overload protection, Under Voltage Lock-out
Protection (UVLO), over voltage protection and oower-on reset and start-up timer are also
MT6223 features. Besides, 3 NMOS switches controlling the RGB LEDs are also embedded to
reduce BOM coount.
Package
The MT6223 device is offered in 9mm×9mm, 224-ball, 0.5 mm pitch, TFBGA package .
3.1.2 Platform Feature
General
Integrated voice-band, audio-band and base-band analog front ends
TFBGA 9mm×9mm, 224-ball, 0.5 mm pitch package
MCU Subsystem
ARM7EJ-S 32-bit RISC processor
High performance multi-layer AMBA bus
Java hardware acceleration for fast Java-based games and applets
Operating frequency: 26/52 MHz
Dedicated DMA bus
7 DMA channels
320K bits on-chip SRAM
On-chip boot ROM for Factory Flash Programming
Watchdog timer for system crash recovery
3 sets of General Purpose Timer