LG KC550 Service Manual

Date: May, 2008 / Issue 1.0

Service Manual

Internal Use Only

Service Manual

KC550

Model : KC550

LGE Internal Use Only

- 3 -

* The information in this manual is subject to change without notice and should not be construed as a commitment by LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make changes to equipment design as advances in engineering and manufacturing methods warrant.

* This manual provides the information necessary to install, program, operate and maintain the KC550.

REVISED HISTORY

Editor Date Issue Contents of Changes S/W Version

Y.W.YUN 5/26 0.1

- 4 -

LGE Internal Use Only

Only for training and service purposes

LGE Internal Use Only

- 5 -

1. INTRODUCTION ...............................7

1.1 Purpose .................................................. 7

1.2 Regulatory Information............................ 7

1.3 ABBREVIATION ..................................... 9

2. GENERAL PERFORMANCE ..........11

2.1 H/W Features.........................................11

2.2 Technical specification...........................12

3. TECHNICAL BRIEF ........................19

3.1 KC550 Component Block diagram.........19

3.2 Main Chip Introduction ...........................20

3.3 Baseband Part Introduction ...................22

3.4 Power Management Unit .......................38

3.5 Power ON/OFF ......................................43

3.6 SIM interface..........................................47

3.7 Memory ..................................................48

3.8 LCD Display ...........................................50

3.9 Keypad Switching & Scanning ...............53

3.10 Keypad back-light illumination .............54

3.11 LCD back-light illumination ..................55

3.12 JTAG interface connector ....................57

3.13 Audio....................................................58

3.14 USB charging circuit ............................62

3.15 BLUETOOTH .......................................63

3.16 FM Radio..............................................66

3.17 Micro SD external memory card slot....67

3.18 18pin Multi Media Interface

connector .............................................69

4. RF circuit technical brief ...............71

4.1 General Description ...............................71

4.2 Receiver part..........................................73

4.3 Transmitter part......................................74

4.4 RF synthesizer .......................................75

4.5 DCXO.....................................................76

4.6 Front End Module control.......................76

4.7 Power Amplifier Module .........................77

4.8 Mode Selection ......................................78

5. PCB layout......................................79

5.1 Main PCB component placement ..........79

6. Trouble shooting............................84

6.1 Trouble shooting test setup....................84

6.2 Power on Trouble...................................85

6.3 Charging trouble ....................................88

6.4 LCD display trouble................................90

6.5 Camera Trouble .....................................93

6.6 Receiver & Speaker trouble ...................95

6.7 Microphone trouble ................................97

6.8 Ear-MIc Jack Detection trouble..............98

6.9 Vibrator trouble ......................................99

6.10 Keypad back light trouble...................100

6.11 SIM & uSD trouble .............................103

6.12 RF Troubleshooting ...........................106

6.13 RF Receiver path Troubleshooting ....110

6.14 RF Transmitter path Troubleshooting 113

7. Download & S/W upgrade...............118

7.1 Download program user guide.............118

7.2 Multi-Download Program Setting .........119

8. CIRCUIT DIAGRAM ......................121

9. BGM PIN MAP...............................131

10. PCB LAYOUT..............................137

11. RF Calibration.............................145

11.1 Test Equipment Setup .......................145

11.2 Calibration Step .................................145

12. Stand-alone Test ........................151

12.1 Test Program Setting .........................151

12.2 Tx Test ...............................................153

12.3 Rx Test...............................................154

13. ENGINEERING MODE ................155

14. EXPLODED VIEW &

REPLACEMENT PART LIST ......157

14.1 Exploded View ...................................157

14.2 Replacement Parts ............................159

14.3 Accessory ..........................................182

Table Of Contents

- 6 -

LGE Internal Use Only

Only for training and service purposes

- 7 -

1. INTRODUCTION

1.1 Purpose

This manual provides the information necessary to repair, calibration, description and download the

features of the KC550.

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 you°Øre 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. LGE

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. LGE 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 KC550 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 the KC550 must be performed only at the LGE or its authorized agents.

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

- 8 -

1. INTRODUCTION

E. Notice of Radiated Emissions

The KC550 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

An KC550 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 contains 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 such as EEPROM to the

factory, use the protective package as described.

LGE Internal Use Only

Only for training and service purposes

- 9 -

1. INTRODUCTION

1.3 ABBREVIATION

For the purposes of this manual, following abbreviations apply:

LGE Internal Use Only

APC Automatic Power Control

BB Baseband

BER Bit Error Ratio

CC-CV Constant Current - Constant Voltage

CLA Cigar Lighter Adapter

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

EGPRS Enhanced General Packet Radio Service

EL Electroluminescence

ESD Electrostatic Discharge

FPCB Flexible Printed Circuit Board

GMSK Gaussian Minimum Shift Keying

GPIB General Purpose Interface Bus

GPRS General Packet Radio Service

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

LGE Internal Use Only

Only for training and service purposes

1. INTRODUCTION

- 10 -

LGE LG Electronics

OPLL Offset Phase Locked Loop

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

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

8PSK 8 Phase Shift Keying

- 11 -

2. GENERAL PERFORMANCE

2.1 H/W Feature

2. GENERAL PERFORMANCE

LGE Internal Use Only

Item Feature Comment

Standard Battery Li-ion, 900mAh

AVG TCVR Current 260mA typ @PL5

Standby Current 2 mA typ @PP9

Talk time 6 hours (GSM TX Level 10)

Standby time Over 450 hours (Paging Period:9, RSSI: -85dBm)

Charging time Under 3 hours

RX Sensitivity EGSM : -105dBm↓ , DCS/PCS : -105dBm↓

TX output power EGSM : 33dBm (@PL 5)

DCS/PCS: 30dBm (@PL 0)

GPRS compatibility Class 12

SIM card type 3V Small

Display 240 x 320 pixels, 2.4 inch QVGA, 262K color, TFT

Status Indicator Soft icons, 0 ~ 9, #, *, Scroll, Send, End/PWR,

Clear AF/Camera double action, Volume Up,

Volume Down

ANT Built in antenna

EAR Phone Jack 18pin multi port Headset jack (W/O remote controller)

PC Synchronization Yes

Speech coding HR/EFR/FR/AMR

Data and Fax Yes

Vibrator Yes

Buzzer No

Voice Recoding Yes

C-Mic Yes

Receiver Yes

Travel Adapter Yes

Options Bluetooth hands-free kit, Data Kit

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2. GENERAL PERFORMANCE

2.2 Technical specification

LGE Internal Use Only

Only for training and service purposes

Item Description Specification

1Frequency Band EGSM

TX: 890 + 0.2 x n MHz

RX: 935 + 0.2 x n MHz ( n = 1 ~ 124 )

TX: 890 + 0.2 x (n-1024) MHz

RX: 935 + 0.2 x (n-1024) MHz ( n = 975 ~ 1023 )

DCS1800

TX: 1710 + ( n-511 ) x 0.2 MHz (n = 512 ~ 885)

RX: TX + 95 MHz

PCS1900

TX: 1850.2 + ( n-512 ) x 0.2 MHz (n = 512 ~ 810)

RX: TX + 80MHz

2 Phase Error RMS < 5 degrees ,

Peak < 20 degrees

3 Frequency Error < 0.1ppm

4 Power Level EGSM

Level Power Toler. Level Power Toler.

5 33 dBm 2dB 13 17 dBm 3dB

6 31 dBm 3dB 14 15 dBm 3dB

7 29 dBm 3dB 15 13 dBm 3dB

8 27 dBm 3dB 16 11 dBm 5dB

9 25 dBm 3dB 17 9 dBm 5dB

10 23 dBm 3dB 18 7 dBm 5dB

11 21 dBm 3dB 19 5 dBm 5dB

12 19 dBm 3dB

DCS1800/PCS1900

Level Power Toler. Level Power Toler.

0 30 dBm 2dB 8 14 dBm 3dB

1 28 dBm 3dB 9 12 dBm 4dB

2 26 dBm 3dB 10 10 dBm 4dB

3 24 dBm 3dB 11 8 dBm 4dB

4 22 dBm 3dB 12 6 dBm 4dB

5 20 dBm 3dB 13 4 dBm 4dB

6 18 dBm 3dB 14 2 dBm 5dB

7 16 dBm 3dB 15 0 dBm 5dB

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2. GENERAL PERFORMANCE

LGE Internal Use Only

Item Description Specification

5 Output RF Spectrum EGSM

(due to modulation) 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

6,000 -71

DCS1800/PCS1900

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

6 Output RF Spectrum EGSM

(due to switching transient) Offset from Carrier (kHz) Max. (dBm)

400 -19

600 -21

1,200 -21

1,800 -24

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2. GENERAL PERFORMANCE

LGE Internal Use Only

Only for training and service purposes

Item Description Specification

6 Output RF Spectrum DCS1800/PCS1900

(due to switching transient) Offset from Carrier (kHz). Max. (dBm)

400 -22

600 -24

1,200 -24

1,800 -27

7 Spurious Emissions Conduction, Emission Status

8 Bit Error Ratio EGSM

BER (Class II) < 2.439% @-102dBm

DCS1800/PCS1900

BER (Class II) < 2.439% @-100dBm

9 Rx Level Report accuracy

10 SLR 8 3 dB

11 Sending Response Frequency (Hz) Max.(dB) Min.(dB)

100 -12 -

200 0 -

300 0 -12

1,000 0 -6

2,000 4 -6

3,000 4 -6

3,400 4 -9

4,000 0 -

12 RLR 2 3 dB

13 Receiving Response Frequency (Hz) Max.(dB) Min.(dB)

100 -12 -

200 0 -

300 2 -7

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. GENERAL PERFORMANCE

LGE Internal Use Only

Item Description Specification

14 STMR 13 5 dB

15 Stability Margin > 6 dB

16 Distortion dB to ARL (dB) Level Ratio (dB)

-35 17.5

-30 22.5

-20 30.7

-10 33.3

0 33.7

7 31.7

10 25.5

17 Side Tone Distortion Three stage distortion < 10%

18

System frequency

2.5ppm

(26 MHz) tolerance

19 32.768KHz tolerance 30ppm

20 Power consumption Standby

- Normal 2 mA(@PP9)

21 Talk Time EGSM/Lvl 7 (Battery Capacity 900mA):180min

EGSM/Lvl12(Battery Capacity 900mA): 320min

22 Standby Time Under conditions, at least 300 hours:

1. Brand new and full 900mAh battery

2. Full charge, no receive/send and keep GSM in idle mode.

3. Broadcast set off.

4. Signal strength display set at 3 level above.

5. Backlight of phone set off.

23 Ringer Volume At least 65 dB under below conditions:

1. Ringer set as ringer.

2. Test distance set as 50 cm

24 Charge Current Fast Charge : < 450 mA

Slow Charge: < 200 mA

25 Antenna Display Antenna Bar Number Power

7 >-92 dBm ~

7 → 5 -97dBm ~ -93dBm 5 → 4 -100dBm ~ -98dBm 4 → 2 -103dBm ~ -101dBm 2 → 1 -105dBm ~ -104dBm 1 → 0< -106 dBm

LGE Internal Use Only

Only for training and service purposes

2. GENERAL PERFORMANCE

- 16 -

Item Description Specification

26 Battery Indicator Battery Bar Number Voltage( 0.05V)

3 3.76V~4.2V

2 3.68V~3.75V

1 3.55V~3.65V

0 3.41V~

27 Low Voltage Warning 3.58V ↓ 0.05V (Call)

3.51V ↓ 0.05V (Standby)

28 Forced shut down Voltage 3.3 0.05 V

29 Battery Type Li-ion Battery or Li-Polymer Battery

Standard Voltage = 3.7 V Battery full charge voltage = 4.2 V Capacity: 900mAh

31 Travel Charger Switching-mode charger

Input: 100 ~ 240 V, 50/60Hz Out put: 5.1, 0.7A

LGE Internal Use Only

2. GENERAL PERFORMANCE

- 17 -

* EDGE RF Specification (Option: is not serviced for “EDGE mode”)

Item Description Specification

1 RMS EVM 9% 2 Peak EVM 30% 395thPercentile EVM 15%

4Origin Offset Suppression ≥ 30dB

5 Power Level EGSM

Level Power Toler. Level Power Toler.

5 27dBm 3dB 13 17dBm 3dB

6 27dBm 3dB 14 15dBm 3dB

7 27dBm 3dB 15 13dBm 3dB

8 27dBm 3dB 16 11dBm 5dB

9 25dBm 3dB 17 9dBm 5dB

10 23dBm 3dB 18 7dBm 5dB

11 21dBm 3dB 19 5dBm 5dB

12 19dBm 3dB

DCS1800, PCS1900

Level Power Toler. Level Power Toler.

0 26dBm 3dB 8 14dBm 3dB

1 26dBm 3dB 9 12dBm 4dB

2 26dBm 3dB 10 10dBm 4dB

3 24dBm 3dB 11 8dBm 4dB

4 22dBm 3dB 12 6dBm 4dB

5 20dBm 3dB 13 4dBm 4dB

6 18dBm 3dB 14 2dBm 5dB

7 16dBm 3dB 15 0dBm 5dB

6 Output RF Spectrum EGSM

(due to modulation) Offset from carrier(kHz) Max. dBc

100 +0.5

200 -30

250 -33

400 -54

600 ~ <1,200 -60

1,200 ~ <1,800 -60

1,800 ~ <3,000 -63

3,000 ~ <6,000 -65

6,000 -71

LGE Internal Use Only

Only for training and service purposes

2. GENERAL PERFORMANCE

- 18 -

Item Description Specification

6 Output RF Spectrum DCS1800, PCS1900

(due to modulation) Offset from carrier(kHz) Max. dBc

100 +0.5

200 -30

250 -33

400 -54

600 ~ <1,200 -60

1,200 ~ <1,800 -60

1,800 ~ <3,000 -63

3,000 ~ <6,000 -65

6,000 -71

7 Output RF Spectrum EGSM

(due to switching transient) Offset from carrier(kHz) Max. dBm

400 -23

600 -26

1,200 -27

1,800 --30

DCS1800, PCS1900

Offset from carrier(kHz) Max. dBm

400 -23

600 -26

1,200 -27

1,800 -30

LGE Internal Use Only

3. TECHNICAL BRIEF

- 19 -

3.1 KC550 Component Block diagram

KC550 is composed with 5 different PCB part such as main PCB, Key PCB, Key FPCB, LCD FPCB and Flash FPCB/ The functional component arrangement is mentioned below diagram.

3. TECHNICAL BRIEF

Figure 1 KC550 Functional block diagram

Flash LED

PWF4

5M Pxl, AF

2.4î QVGA TFT

2.4î QVGA TFT (240x320)

(240x320)

KEYPAD

Acceleration

Sensor

: Signal , Control Connection : RF Connection : Power Connection : Mechanical Connection

MIPI I/F

LCD 16bit

I/F

DC/DC

Converter

Charge

Pump

BD6095

LCD B/L

Camera LDO

(1.8V, 2.8V)

MMIC/ISP

M180

Audio Codec+AMP

WM8990

16pi, 3.4t

SPK

LP3907

1.2V, 1.8V,

MMIC 16bit I/F

Radio TX

signal

512Mb SDRAM)

Headset

antenna

PMIC

2.6V

A/

D/

18

16

Memory

(1Gb NAND +

BT

BT/FM radio

BLUCORE5-FM

SIM

UART

I2S

BB+RF

PMB8888

D/

4

Micro SD SIM Card

Socket

26MHz

RX IQ

TX IQ

RF Ctrl

Backup Battery

Charging

VUSB

ISL9221

Battery

900mAh

PAM

TQM7M5005

Radio RX

signal

antenna

FEM

LSHS-C085FB

18pin

I/O

Main

RCV

Motor

Stereo

headset

TA

USB cable

- 20 -

3. TECHNICAL BRIEF

3.2 Main Chip Introduction

3.2.1 General Description

world’s first single-chip solution for feature-rich mobile phones. The EDGE-capable device combines

alldigital and analog functions of the baseband, a quad-band RF transceiver, and the power

management circuitry into a single chip. With an option for memory stacking (“Package on Package”,

JEDEC compliant) the key functions of a mobile phone are now combined into a single device,

providing all the benefits that come from a maximum level of integration. Full software re-use from the

proven Infineon EDGE platform, MP-ELite, enables fast time-to-market using a comprehensive

development kit available to all customers today.

set of multimedia applications such as:

LGE Internal Use Only

Only for training and service purposes

- 21 -

3. TECHNICAL BRIEF

• Still picture imaging up to 2 MPixel

• MPEG4 video encode/decode

• Video streaming

• MP3 playback

LGE Internal Use Only

- 22 -

3. TECHNICAL BRIEF

3.3 Baseband Part Introduction

3.3.1 Block Description

Connectivity

applications:

• USB 2.0 Full Speed (12 Mbps)

• IrDA Controller

Supports Infrared SIR Mode Transceivers

• RS-232 over a 16C550 compliant UART

• MMC/SD Memory Card Interface

- Low Voltage Capable

- SDIO expandable (using external components)

LGE Internal Use Only

Only for training and service purposes

- 23 -

3. TECHNICAL BRIEF

• Ready to connect to the Infineon’s Bluemoon Family Bluetooth Transceivers

- HCI (H5) optimized USIF (Universal Serial Interface)

- Dedicated PCM-style digital audio interface (I2S)

- Dedicated power supply

• Microcontroller-Like Extension Interface For multimedia companions (for example, complex display/camera modules or graphic accelerators)

• External Memory Interface Supporting:

- SDRAM

- Cellular RAM

- Burst Flash

- SRAM

- NAND flashes (error correction capability in HW)

• User Interface (Keypad) Supporting up to 74 keys with multiple key-press capability

• SIM Card interface (USIM) ISO 7816 compatible

• Analogue Measurement Unit For various general purpose measurements such as battery voltage, battery, VCXO and environmental temperature, battery technology, transmission power, offset, on-chip temperature, etc.

Security

• Secure Boot and Flash Update

• SHA1 HW acceleration

• Secure Debug

• 128-bit customer defined efuse key

• Anti-intrusion logic.

Audio

Besides the telephony voice CODECs supplied by the Firmware running on the TEAKLite® DSP core,

the ARM926 core enables running high-quality audio CODECs such as MPEG-1/2 Layer-3 Decode

(MP3), AAC+ or AAC++. Audio streaming is supported according to the 3GPP PSS Release 4

standard.

The output of audio and voice codecs can be mixed and routed to the integrated Hi-Fi Stereo

voiceband supporting CD-Quality. Alternatively, the audio can also be sinked to a mono loudspeaker

using the integrated hands-free amplifier.

LGE Internal Use Only

- 24 -

3. TECHNICAL BRIEF

Video and Imaging

interface and a display module over a microcontroller-like parallel or serial interface. Furthermore,

ARM’s MOVE coprocessor is integrated to accelerate video encoding algorithms (for example, H.263

or MPEG-4). This fulfills basic multimedia requirements and allows connecting commodity cameras

and displays without the need of an additional multimedia IC. The computational power for encoding

and decoding still pictures (JPEG) and video sequences (H.263 or MPEG-4) is provided by the

integrated ARM926 core.

Over-the-air interface JPEG pictures and H.263 or MPEG-4 videos can be sent or received as MMS by

means of (E)GPRS.

Supported "still pictures" multimedia scenarios are:

• View Finding for a Picture Snapshot: Captured frames are transferred from the camera IF to the

display IF at up to15 fps (depending on the camera used) in QCIF resolution (depending on the display used). Downscaling and color conversion is done by the camera and display interface logic. Therefore, view finding for a snapshot is possible without burdening the CPU. However, picture rotation and/or overlay are performed by SW if required.

• Shooting: The captured picture, with up to 1.31 MPixel resolution (SXGA 1280 x 1024), is

transferred within 1/15 sec to external memory.1) Then, JPEG compression is done by SW, while the viewfinder is frozen so that the user can immediately see the snapshot on the display.

• Photo Flash: Under low light conditions usually a photo flash is required. To activate the flash at the

right time, a general purpose timer unit (GTPU) can be used that is triggered by the frame synchronization signal (VSYNC) from the camera interface.

• Processing: JPEG thumbnail generation, picture overlay, picture rotation and other picture

processing tasks are performed by SW.

• Viewing: A JPEG picture is decoded, down-scaled and format converted by SW and then transferred

to the display interface. JPEG thumbnails can also be transferred directly to the display interface after decoding by SW without additional downscaling.

• Storage: JPEG pictures can be stored on an MMC/SD card, a Flash or a PC.

• Sending/Receiving: JPEG thumbnails can be sent/received as MMS (E-GPRS). Full resolution

JPEG pictures can be sent/received as e-mail or downloaded from the internet. Supported "video sequence" multimedia scenarios:

• Record Video Sequences: Captured frames in QCIF resolution are transferred to internal memory

at 15 fps. H.263 or MPEG-4 encoding is performed on-the-fly by SW with the support of the MOVE coprocessor. The audio recording is performed on the DSP (GSM AMR CODEC). Multiplexing of audio and video streams is performed by the ARM.

LGE Internal Use Only

Only for training and service purposes

- 25 -

3. TECHNICAL BRIEF

• View Finding during Video Encoding: During video recording the user needs to see what is being

recorded. Therefore, the captured frames are not only encoded but also transferred to the display interface. If only every second frame from the camera is used for encoding, viewfinding is possible without burdening the CPU. However, if each frame from the camera has to be encoded, due to low camera frame rate, the YCbCr4:2:2 to YCbCr4:4:4 color conversion and further downscaling is performed by SW. Picture rotation and overlay has to be done in SW in any case.

• Storage: Compressed H.263 or MPEG-4 videos can be stored on an MMC/SD, a Flash or a PC.

• Viewing: De-multiplexing of audio and video streams is performed by the ARM. The H.263 or

MPEG-4 decoding is also done by SW on the ARM and then the frames are transferred to the display interface. Audio decoding (GSM-AMR) is done on the DSP. The audio/video synchronization is done by time stamp feedback from the DSP to the ARM.

• Sending/Receiving: H.263 or MPEG-4 videos can be sent/received as MMS (E-GPRS), as e-mail or

downloaded from the internet.

Higher Multimedia Performance

If higher multimedia performance is required, an external multimedia IC can be connected to S-

interface pins are used in a multiplex mode to connect an external multimedia IC to the S-

multimedia IC, which contains functions (in HW and/or SW) to process still images and video data.

This configuration is intended for higher-end graphics features (for example, high quality video

streaming, video conferencing, hardware-assisted 2D/3D graphics functions, etc.).

LGE Internal Use Only

- 26 -

3. TECHNICAL BRIEF

3.3.2 External Devices connected to memory interface

Table 1 Memory interface

3.3.3 RF Interface

RF ICs Periodically each TDMA frame.

Table 2. RF Interface Spec

.

LGE Internal Use Only

Only for training and service purposes

Device Name Maker Remark

FLASH K5D1G12ACE-D075 SAMSUNG 1G(128Mx8) NAND

SDRAM K5D1G12ACE-D075 SAMSUNG 512M(32Mx16) SDRAM

LCD TX08D13VM0AAA TMD 16bit access 2times transmission

Multimedia IC 215-0638018 AMD Multimedia processing

T_OUT

Resource Interconnection Description

PABS PA_BAND TX RF band select

PAMODE PA_MODE PAM Mode select

FE1 VC1 FEM control

FE2 VC2 FEM control

PAEN PA_EN PAM Power on

VRAMP TX_RAMP APC

- 27 -

3. TECHNICAL BRIEF

3.3.4 USART Interface

KC550 have a UART Driver as follow :

- USART1 : Hardware Flow Control / SW upgrade / Calibration

Table 3. USIF Interface Spec.

3.3.5 ADC channel

BBP ADC block is composed of 7 external ADC channel. This block operates charging process and

other related process by reading battery voltage and other analog values.

LGE Internal Use Only

USART_0(USART1)

Resource Name Remark

USART0_TXD UART_TX Transmit Data

USART0_RXD UART_RX Receive Data

USART0_CTS ACCEL_INT Interrupt

USART0_RTS MMC_DETECT GPIO

DSPOUT_0 JACK_DETECT Interrupt

ADC channel

Resource Interconnection Description

M0 BATT_ID Battery IC check

M1 RF_TEMP RF block temperature measure

M2 N.C.

M8 VSUPPLY Battery supply voltage measure

M9 N.C.

M10 REMOTE_ADC Remote control key detect

3.3.6 GPIO map

Over a hundred allowable resources, KC550 is using as follows except dedicated to SIM and Memory.

KC550 GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level,

is shown in below table.

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3. TECHNICAL BRIEF

LGE Internal Use Only

Only for training and service purposes

Port Function Net Name Description

#Keypad

KP_IN0 NONE

KP_IN1 KP_IN(1)

KP_IN2 KP_IN(2)

KP_IN3 KP_IN(3)

KP_IN4 KP_IN(4)

KP_IN5 KP_IN(5)

KP_IN6 KP_IN(6)

KP_OUT0 KP_OUT(0)

KP_OUT1 KP_OUT(1)

KP_OUT2 KP_OUT(2)

KP_OUT3 KP_OUT(3)

#USART0

USART0_RXD UART_RX

USART0_TXD UART_TX

USART0_RTS_N MMC_DETECT

USART0_CTS_N ACCEL_INT

DSPOUT0 JACK_DETECT

#USB

USB_DPLUS USB_DP

USB_DMINUS USB_DM

#CIF:Camera Interface

CIF_D0 MM_AD0

CIF_D1 MM_AD1

CIF_D2 MM_AD2

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3. TECHNICAL BRIEF

LGE Internal Use Only

CIF_D3 MM_AD3

CIF_D4 MM_AD4

CIF_D5 MM_AD5

CIF_D6 MM_AD6

CIF_D7 MM_AD7

CIF_PCLK

CIF_HSYNC MM_WAIT

CIF_VSYNC TP

CLKOUT2 GPO_CTRL1

CIF_PD_GPIO HS_SEL N.A

CIF_RESET_GPIO GPO_CTRL2

#Display_Interface

DIF_D0 MM_AD8

DIF_D1 MM_AD9

DIF_D2 MM_AD10

DIF_D3 MM_AD11

DIF_D4 MM_AD12

DIF_D5 MM_AD13

DIF_D6 MM_AD14

DIF_D7 MM_AD15

DIF_CS1 MM_CS0

DIF_CS2 REMOTE_INT

DIF_CD MM_A16

DIF_WR MM_WR

DIF_RD MM_RD

DIF_HD MM_INT

DIF_VD BT_INT

DIF_RESET1_GPIO HOOK_DETECT

#I2C

I2C_SCL I2C_SCL

I2C_SDA I2C_SDA

PM_INT NONE

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3. TECHNICAL BRIEF

LGE Internal Use Only

Only for training and service purposes

#Chip Card (USIM1)

CC_IO SIM_IO

CC_CLK SIM_CLK

CC_RST SIM_RST

#MMCI: Multimedia Card IF

MMCI_CMD MMCI_CMD

MMCI_DAT0 MMCI_DAT0

MMCI_CLK MMCI_CLK

#USIF: Universal Serial IF

USIF_TXD_MTSR UART_BT_TX

USIF_RXD_MRST UART_BT_RX

USIF_SCLK BT_VCXO_EN

#I2S1: DAI-PCM

I2S1_CLK0 I2S1_CLK

I2S1_RX I2S1_RX

I2S1_TX I2S1_TX

I2S1_WA0 I2S1_WA0

#MMCI: SD-Extension

MMCI_DAT1 MMCI_DAT1

MMCI_DAT2 MMCI_DAT2

MMCI_DAT3 MMCI_DAT3

#Voiceband: Analog Interface

EP_N SND_L

EP_P SND_R

HS_N EAR_N

EP_CM NA

HS_P EAR_P

MIC1_N MIC_N

MIC1_P MIC_P

MIC2_N HS_MIC_N

MIC2_P HS_MIC_P

VMIC VMIC

#Measurement

M0 BAT_ID

M1 RF_TEMP

M2 JACK_TYPE

M7 GND

M8 VBAT

M9 LOAD

M10 REMOTE_ADC

#Bandgap reference: Analog Interface

VREF2 GND

IREF2 GND

#JTAG

TDO TDO

TDI TDI

TMS TMS

TCK TCK

TRST_n TRST_N

RTCK RTCK

#Debug

TRIG_IN TRIG_IN

MON1 MON1

MON2 MON2

#External Bus Interface (EBU)

#FCDP: Flash Controller DMA Port

FCDP_RBN FCDP

#GSM TDMA Timer: GSM Control

T_OUT1 NONE

T_OUT2 NONE

T_OUT3 UART_BT_RTS

T_OUT4 UART_BT_CTS

T_OUT5 FLIP_OPEN

T_OUT6 PA_MODE_2

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3. TECHNICAL BRIEF

LGE Internal Use Only