LG KP235 User manual

Date: March, 2008 / Issue 1.0
Service Manual Model : KP235/230
Service Manual
KP235/230
Internal Use Only

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1. INTRODUCTION .............................. 5
1.1 Purpose .................................................. 5
1.2 Regulatory Information ........................... 5
1.3 Abbreviations ......................................... 7
2. PERFORMANCE.............................. 9
2.1 H/W Features.......................................... 9
2.2 Technical Specification ......................... 10
3. TECHNICAL BRIEF ....................... 15
3.1 TX module (SKY77518, U501) ............. 15
3.2 Transceiver (AD6548, U502) ................ 17
3.3 26 MHz Clock (Crystal, X500)............... 19
3.4
B/T Chip (Bluecore 4-ROM WLCSP, U401) .. 20
3.5 Baseband Processor (AD6724, U104).. 22
3.6 Display and Interface ............................ 28
3.7 Camera Interface(AIT701G , U402)...... 30
3.8 Keypad Switches and Scanning ........... 32
3.9 Microphone ........................................... 33
3.10 Main Speaker...................................... 34
3.11 Headset Interface................................ 35
3.12 Key Back-light Illumination.................. 36
3.13 LCD Back-light Illumination................. 37
3.14 VIBRATOR...........................................38
3.15 Battery Charging................................. 39
4. TROUBLE SHOOTING .................. 40
4.1 RF Component...................................... 40
4.2 RX Trouble............................................ 41
4.3 TX Trouble ............................................ 44
4.4 Power On Trouble................................. 48
4.5 Charging Trouble .................................. 50
4.6 Vibrator Trouble .................................... 52
4.7 LCD Trouble.......................................... 54
4.8 Camera Trouble.................................... 57
4.9 Speaker Trouble ................................... 60
4.10 SIM Card Interface Trouble................. 62
4.11 Earphone Trouble ............................... 64
4.12 KEY backlight Trouble ........................ 66
4.13 Receiver Trouble................................. 68
4.14 Microphone Trouble............................ 70
4.15 RTC Trouble ....................................... 72
4.16 Folder on/off Trouble........................... 74
5. DOWNLOAD...................................... 76
5.1 Download.............................................. 76
6. BLOCK DIAGRAM ......................... 82
7. CIRCUIT DIAGRAM ....................... 83
8. BGA IC Pin Check ......................... 91
9. PCB LAYOUT................................. 95
10. ENGINEERING MODE ............... 101
10.1 BB Test [MENU 1]............................. 102
10.2 RF Test [MENU 2]............................. 104
10.3 MF mode [MENU 3] .......................... 104
10.4 Trace option [MENU 4] ..................... 105
10.5 Call timer [MENU 5] .......................... 105
10.6 Fact. Reset [MENU 6]....................... 105
10.7 S/W version....................................... 105
11. STAND ALONE TEST ................ 106
11.1 Introduction ....................................... 106
11.2 Setting Method.................................. 106
11.3 Means of Test ................................... 107
12. AUTO CALIBRATION ................ 109
12.1 Overview........................................... 109
12.2 Equipment List .................................. 109
12.3 Test Jig Operation............................. 110
12.4 Procedure ......................................... 111
12.5 AGC .................................................. 113
12.6 APC................................................... 113
12.7 ADC .................................................. 113
13. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 115
13.1 Exploded View .................................. 115
13.2 Replacement Parts ........................... 117
13.3 Accessory ......................................... 132
Table Of Contents
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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1. INTRODUCTION
1.1 Purpose
This manual provides the information necessary to repair, calibration, 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 does not warrant that this
product is immune from the above case but will prevent unauthorized use of common-carrier
telecommunication 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 unauthorized alternations or repair may affect the regulatory status of the system
and may void any remaining warranty.
1. INTRODUCTION
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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1. INTRODUCTION
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.
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 Device (ESD), are indicated by the sign.
Following information is ESD handling:
• 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 package as
described.
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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1. INTRODUCTION
1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
APC Automatic Power Control
BB Baseband
BER Bit Error Ratio
CC-CV Constant Current - Constant Voltage
DAC Digital to Analog Converter
DCS Digital Communication System
dBm dB relative to 1 milli watt
DSP Digital Signal Processing
EEPROM Electrical Erasable Programmable Read-Only Memory
ESD Electrostatic Discharge
FPCB Flexible Printed Circuit Board
GMSK Gaussian Minimum Shift Keying
GPIB General Purpose Interface Bus
GSM Global System for Mobile Communications
IPUI International Portable User Identity
IF Intermediate Frequency
LCD Liquid Crystal Display
LDO Low Drop Output
LED Light Emitting Diode
OPLL Offset Phase Locked Loop

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1. INTRODUCTION
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
PAM Power Amplifier Module
PCB Printed Circuit Board
PGA Programmable Gain Amplifier
PLL Phase Locked Loop
PSTN Public Switched Telephone Network
RF Radio Frequency
RLR Receiving Loudness Rating
RMS Root Mean Square
RTC Real Time Clock
SAW Surface Acoustic Wave
SIM Subscriber Identity Module
SLR Sending Loudness Rating
SRAM Static Random Access Memory
PSRAM Pseudo SRAM
STMR Side Tone Masking Rating
TA Travel Adapter
TDD Time Division Duplex
TDMA Time Division Multiple Access
UART Universal Asynchronous Receiver/Transmitter
VCO Voltage Controlled Oscillator
VCTCXO Voltage Control Temperature Compensated Crystal Oscillator
WAP Wireless Application Protocol

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2. PERFORMANCE
2.1 H/W Features
2. PERFORMANCE
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Feature Comment
Standard Battery Li-ion, 3.7V 800mAh
Talk time Up to 200min: GSM Tx Level 7
Stand by time Up to 200 hours (Paging Period: 5, RSSI: -85
Charging time Approx. 2.5 hours
RX Sensitivity -102dBm
TX output power GSM900: 32.5dBm(Level 5),
DCS: 29.5dBm(Level 0)
GPRS compatibility Class 10
SIM card type 3V only
Display MAIN: TFT 128 ×160 pixel 262K Color
SUB: CSTN 96 ×64 pixel 65K Color
Hard icons. Key Pad
Status Indicator 0 ~ 9, #, *, Up/Down/Left/Right/Ok Navigation Key
Menu Key, Clear Key, Back Key, Confirm Key
Send Key, Volume Key, PWR Key, Camera Key, Hot Key
ANT Internal
EAR Phone Jack Yes (Mono)
PC Synchronization Yes
Speech coding EFR/FR/HR/AMR
Data Yes
Vibrator Yes
Loud Speaker Yes
Voice Recoding Yes
Microphone Yes
Speaker/Receiver One way speaker
Travel Adapter Yes
MIDI SW MIDI (Mono SPK)
Camera VGA CMOS
Bluetooth Bluetooth version 2.0+EDR

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2. PERFORMANCE
2.2 Technical Specification
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
GSM900
TX: 890 + 0.2 x (N-1024) MHz (N=975 ~ 1023)
1Frequency Band RX: 935 + 0.2 x (N-1024) MHz (N=975 ~ 1023)
DCS
TX: 1710.2 + 0.2x(N-512 ) MHz (N=512 ~ 885)
RX: 1805.2 + 0.2x(N-512 ) MHz (N=512 ~ 885)
2Phase Error RMS < 5 degrees
Peak < 20 degrees
3Frequency Error < 0.1 ppm
GSM900
Level Power Toler. Level Power Toler.
533 dBm 2dB 13 17 dBm 3dB
631 dBm 3dB 14 15 dBm 3dB
729 dBm 3dB 15 13 dBm 3dB
827 dBm 3dB 16 11 dBm 5dB
925 dBm 3dB 17 9 dBm 5dB
10 23 dBm 3dB 18 7 dBm 5dB
11 21 dBm 3dB 19 5 dBm 5dB
4Power Level 12 19 dBm 3dB
DCS
Level Power Toler. Level Power Toler.
030 dBm 2dB 8 14 dBm 3dB
128 dBm 3dB 9 12 dBm 4dB
226 dBm 3dB 10 10 dBm 4dB
324 dBm 3dB 11 8 dBm 4dB
422 dBm 3dB 12 6 dBm 4dB
520 dBm 3dB 13 4 dBm 4dB
618 dBm 3dB 14 2 dBm 5dB
716 dBm 3dB 15 0 dBm 5dB

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2. PERFORMANCE
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
GSM900
Offset from Carrier (kHz). Max. [dBc]
100 +0.5
200 -30
250 -33
400 -60
600 ~ <1,200 -60
1,200 ~ <1,800 -60
1,800 ~ <3,000 -63
3,000 ~ <6,000 -65
5Output RF Spectrum 6,000 -71
(due to modulation) DCS
Offset from Carrier (kHz). Max. [dBc]
100 +0.5
200 -30
250 -33
400 -60
600 ~ <1,200 -60
1,200 ~ <1,800 -60
1,800 ~ <3,000 -65
3,000 ~ <6,000 -65
6,000 -73
GSM900
Offset from Carrier (kHz) Max. [dBm]
Output RF Spectrum 400 -19
6(due to switching transient) 600 -21
1,200 -21
1,800 -24

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2. PERFORMANCE
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
DCS
Offset from Carrier (kHz) Max. [dBm]
Output RF Spectrum 400 -22
6(due to switching transient) 600 -24
1,200 -24
1,800 -27
7Spurious Emissions Conduction, Emission Status
GSM900
8Bit Error Ratio BER (Class II) < 2.439% @-102 dBm
DCS
BER (Class II) < 2.439% @-102 dBm
9RX Level Report Accuracy 3 dB
10 SLR 8 3 dB
Frequency (Hz) Max.(dB) Min.(dB)
100 -12 -
200 0 -
300 0 -12
11 Sending Response 1,000 0 -6
2,000 4 -6
3,000 4 -6
3,400 4 -9
4,000 0 -
12 RLR 2 3 dB
Frequency (Hz) Max.(dB) Min.(dB)
100 -12 -
200 0 -
300 2 -7
13 Receiving Response 500 * -5
1,000 0 -5
3,000 2 -5
3,400 2 -10
4,000 2
* Mean that Adopt a straight line in between 300 Hz
and 1,000 Hz to be Max. level in the range.

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2. PERFORMANCE
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
14 STMR 13 5 dB
15 Stability Margin > 6 dB
dB to ARL (dB) Level Ratio (dB)
-35 17.5
-30 22.5
-20 30.7
16 Distortion -10 33.3
033.7
731.7
10 25.5
17 Side Tone Distortion Three stage distortion < 10%
18 System frequency ≤2.5ppm
(13 MHz) tolerance
19 32.768KHz tolerance ≤ 30 ppm
At least 65 dBspl under below conditions:
20 Ringer Volume 1. Ringer set as ringer.
2. Test distance set as 50 cm
21 Charge Current Fast Charge: < 600 mA
Slow Charge: < 120 mA
Antenna Bar Number Power
5-92 dBm ~
4-100 dBm ~ -93 dBm
22 Antenna Display 3 -101 dBm ~ -100 dBm
2-103 dBm ~ -101 dBm
1-105 dBm ~ -104 dBm
0~-106 dBm
Battery Bar Number Voltage
Power off 3.33V 0.03 V
23 Battery Indicator 0(blink) 3.54V 0.05 V
13.64V 0.05 V
23.75V 0.05 V
33.76V 0.05 V ~

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2. PERFORMANCE
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
24 Low Voltage Warning 3.54 0.05 V (Call) every 1 minutes
3.54 0.05 V (Standby)
25 Forced shut down Voltage 3.33 0.05V
1 Li-ion Battery
26 Battery Type Standard Voltage = 3.7 V
Battery full charge voltage = 4.2 V
Battery full charge voltage = 4.2 V
Switching-mode charger
27 Travel Charger Input: 100 ~ 240 V, 50/60 Hz
Output: 4.8V ~ 6.4V, 400 mA

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3. TECHNICAL BRIEF
3.1 TX module (SKY77518, U501)
The SKY77518 is a Transmit and receive front-end-module (FEM) with Integrated Power Amplifier
Control (iPAC) for dual-band cellular handsets comprising GSM900 and DCS operation. Designed in a
low profile, compact form factor, the SKY77518 offers a complete Transmit VCO-to-Antenna and
Antenna-to-Receive SAW filter solution. The FEM also supports class 12 General Packet Radio
Service (GPRS) multi-slot operation.
The module consists of a GSM900 PA block and a DCS PA block, impedance-matching circuitry for 50
ohm input and output impedances, TX harmonics filtering, high linearity and low insertion loss PHEMT
RF switches, diplexer and a Power Amplifier Control (PAC) block with internal current sense resistor. A
custom BiCMOS integrated circuit provides the internal PAC function and decoder circuitry to control
the RF switches. The two Heterojunction Bipolar Transistor (HBT) PA blocks are fabricated onto a
single Gallium Arsenide (GaAs) die. One PA block supports the GSM900 band and the other PA block
supports the DCS band. Both PA blocks share common power supply pads to distribute current. The
output of each PA block and the outputs to the two receiver pads are connected to the antenna pad
through PHEMT RF switches and a diplexer. The GaAs die, PHEMT die, Silicon (Si) die and passive
components are mounted on a multi-layer laminate substrate. The assembly is encapsulated with
plastic overmold.
Band selection and control of transmit and receive modes are performed using two external control
pads. Refer to the functional block diagram in Figure 3.1 below. The band select pad (BS) selects
between GSM and DCS modes of operation. The transmit enable (TX_EN) pad controls receive or
transmit mode of the respective RF switch (TX = logic 1). Proper timing between transmit enable
(TX_EN) and Analog Power Control (VRAMP) allows for high isolation between the antenna and
TX_VCO while the VCO is being tuned prior to the transmit burst.
The SKY77518 is compatible with logic levels from 1.2V to VCC for BS and TX_EN pads, depending
on the level applied to the VLOGIC pad. This feature provids additional flexibility for the designer in the
selection of FEM interface control logic.
3. TECHNICAL BRIEF
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.1 Functional Block Diagram

Pin Mame Description
1VCATT Battery input voltage
2VLOGIC Control logic level selection/Standby control
3VRAMP Analog power control voltage input
4TX_EN TX/RX select (mode control)
5BSBand Select (mode control)
6DCS_RX DCS Receive RF Output (1805-1880 MHz)
7GSM_RX GSM Receive RF Output (920-960 MHz)
8-10 GND RF and DC Ground
11 ANT RF_IN/RF_OUT to Antenna
12-16 GND RF and DC Ground
17 GSM_IN RF input 880-915 MHz
18 NC No Connect
19 DCS_IN RF input 1710-1785 MHz
20 GND RF and DC Ground
GMD PADS GROUND GRID Ground Pads, module underside
Mode VLOGIC
Input Control Bits
TX_En BS
STANDBY 0 X1 X1
GSM_RX 1 0 0
CS_RX 1 0 1
GSM_TX 1 1 0
DCS_TX 1 1 1
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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Table 3.1 Pad description
Table 3.2 Mode Control logic
Figure 3.2 Pad configuration (Top view) and case marking

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3. TECHNICAL BRIEF
3.2 Transceiver (AD6548, U502)
The AD6548 provides a highly integrated direct conversion radio solution that combines, on a single chip, all radio
and power management functions necessary to build the most com-pact GSM radio solution possible. The only
external components required for a complete radio design are the Rx SAWs, PA, Switchplexer and a few passives
enabling an extremely small cost effective GSM Radio solution. The AD6548 uses the industry proven direct
conversion receiver architecture of the OthelloTM family. For Quad band applications the front end features four
fully integrated programmable gain differential LNAs. The RF is then down converted by quad-rature mixers and
then fed to the baseband programmable-gain amplifiers and active filters for channel selection. The Receiver
output pins can be directly connected to the baseband analog processor. The Receive path features automatic
calibration and tracking to remove DC offsets. The transmitter features a translation-loop architecture for directly
modulating baseband signals onto the integrated TX VCO.
The translation-loop modulator and TX VCO are extremely low noise removing the need for external SAW filters
prior to the PA. The AD6548 uses a single integrated LO VCO for both the receive and the transmit circuits. The
synthesizer lock times are optimized for GPRS applications up to and including class 12.
AD6548 incorporates a complete reference crystal calibration system. This allows the external VCTCXO to be
replaced with a low cost crystal. No other external components are required. The AD6548 uses the traditional
TCXO reference source. The AD6548 also contains on-chip low dropout voltage regulators (LDOs) to deliver
regulated supply voltages to the functions on chip, with a battery input voltage of between 2.9V and 5.5V.
Comprehensive power down options are included to minimize power consumption in normal use. A standard 3
wire serial interface is used to program the IC. The interface features low-voltage digital interface buffers
compatible with logic levels from 1.6V to 2.9V.
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.3 AD6548 Block Diagram
Antenna Switch Module
DC Offset
Correction
DC Offset
Correction
PFD
/2
LDO
Reg 3
LDO
Reg 2
LDO
Reg 1
Frac-N Synth
RX LO
Generator
TX LO
Generator
Xtal Osc
+ Tuning
Serial
Interface
/4
SEN
SCLK
SDATA
RX1900B
RX1900
RX1800B
RX1800
RX900B
RX900
RX850B
RX850
TXOP_HI
TXOP_LO
VDD VBAT VLDO3 VLDO2 VLDO1
LO VCO
Supply
REF_OP
REFIN
REFINB
VAFC
VCC_REF
Q
QB
I
IB
VCC_BBI
VCC_BBQ
LNA Gain
Reduction
TX_LO2
TX_LO1
TX_LO2
TX_LO1
General
Supply
TX circuits
supply
CLK
RXQB
RXQ
TXQB
TXQ
RXIB
RXI
TXI
TXIB
AFC
REF_OP
Band
Control
TX Loop
Filter
GSM1800/1900
GSM850/900
PA Module
AD6548
VCC_FE
VCC_TXVCO
Ref
Supply
VCC_
TXVCO

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Notes:
1. Supply regulated by internal LDO3 and should not be connected to any other supply
2. Internally connected as Synth supply (Counters + SDM + Charge pump)
3. Supply regulated by internal LDO2 and should not be connected to any other supply
3. TECHNICAL BRIEF
- 18 -
Table 1 AD6548/9 Pin Descriptions
No Name Description No Name Description
1VCC_FE Front end supply (IP) 17 VCC_REF Reference Oscillator Supply (IP)
2I I baseband input/output 18 VAFC/ AD6548 Crystal Freq control (IP)
N/C AD6549: Spare Pin
3IBIbaseband input/output 19 REFIN Crystal Connection
4VCC_BBI Baseband I, TX path supply (IP) 20 REFINB Crystal Connection
5SDATA Serial port data 21 REF_OP Reference Frequency Output
6SCLK Serial port clock 22 QB Q baseband input/output
7SEN Serial port enable 23 Q Q baseband input/output
8N/C Not connected 24 VCC_BBQ Baseband Q supply (IP)
9VLDO3 TX LDO Output (1) 25 RX1900B PCS 1900 LNA input
10 TXOP_LO Transmit O/P (850/900MHz) 26 RX1900 PCS 1900 LNA input
11 TXOP_HI Transmit O/P (1800/1900MHz) 27 RX1800B DCS 1800 LNA input
12 VCC_TXVCO TX VCO supply (1) 28 RX1800 DCS 1800 LNA input
13 VDD Serial interface supply 29 RX900B E-GSM LNA input
14 VBAT Battery I/P for LDO reg’s 30 RX900 E-GSM LNA input
15 VLDO1 LDO regulator Output (2) 31 RX850B GSM 850 LNA input
16 VLDO2 LO VCO Supply (3) 32 RX850 GSM 850 LNA input
GOMPLIANT TO JEDEC STANDARDS MO-220-VHHD-2

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3. TECHNICAL BRIEF
3.3 26 MHz Clock (Crystal, X500)
The 26 MHz clock (X500) consists of a TCXO (Crystal Oscillator) which oscillates at a frequency of 26 MHz. The
AD6548 requires only an external low cost crystal as the frequency reference. The circuitry to oscillate the crystal
and tune its frequency is fully integrated. The Oscillator is a balanced implementation requiring the crystal to be
connected across 2 pins. There is a programmable capacitor array included for coarse tuning of fixed offsets (e.g.
crystal manufacturing tolerance), and an integrated varactor for dynamic control. The oscillator is designed for use
with a 26MHz crystal. Dedicated control software ensures excellent frequency stability under all circumstances.
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.4 CRYSTAL CIRCUIT DIAGRAM
26MHz
X500
TSX-3225_26MHZ
12
34

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3. TECHNICAL BRIEF
3.4 B/T Chip (Bluecore 4-ROM WLCSP, U401)
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
System Architecure Device Features

- 21 -
3. TECHNICAL BRIEF
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Clock
Generation
Baseband and Logic
Memory
Mapped
Control
Status
Physical
Layer
Hardware
Engine
Burst
Mode
Controller
Microcontroller
RISC
Microcontroller
Interrupt
Controller
Event Timer
DAC
IQ MOD
Memory
Management
Unit
RF_B RF_A
PA
AUX_DAC AUX
DAC
RF Transmitter
XTAL_ OUT
XTAL_IN
Fref
-45
+45
RF Synthesiser
RF
Synthesiser
/N/
N+1
Loop Filter
VDD_ CORE
TEST_EN
VDD_ PADS
RESETB
PIO[2]
VSS_ ANA
VSS_ RADIO
IQ DEMOD
ADC
Demodulator
RF Receiver
RSSI
LN
A
Programmable I/O
AIO
PIO[3] PIO[4] PIO[5] PIO[6] PIO[7] PIO[8] PIO[9]
VDD_ RADIO
RAM
Internal
ROM
VSS_LO
AIO[2]
AIO[0]
Tune
ADC
ATTENUATO R
VSS_DIG
VSS_ PADS
Synchronous
Serial
Interface
SPI_CSB SPI_CLK SPI_MOSI SPI_MISO
UART_TX UART_RX UART_RTS UART_CTS PCM_OUT PCM_IN PCM_SYNC PCM_CLK
UART
Audio PCM
Interface
VDD_ USB
USB
USB_DP USB_DN
PIO[10]
VREG
Out
In
VREG_IN
VDD_ ANA
VDD_LO
VDD_PIO
PIO[1] PIO[0]