LG DA-3520, DA-3530-A Service manual

- 1-1 -

CONTENTS

SECTION 1. GENERAL

• SERVICING PRECAUTIONS

.....................................................................................................................

1-2

• ESD PRECAUTIONS

..................................................................................................................................

1-4

• SPECIFICATIONS

......................................................................................................................................

1-5

• LOCATION OF CUSTOMER CONTROLS

.................................................................................................

1-6

SECTION 2. AUDIO PART

• ELECTRICAL TROUBLESHOOTING GUDIE

............................................................................................

2-1

• DVD PLAYER PROGRAM DOWNLOAD METHOD

...................................................................................

2-5

• WAVEFORMS OF MAJOR CHECK POINT

...............................................................................................

2-7

• INTERNAL BLOCK DIAGRAM OF IC’s

......................................................................................................

2-8

• IC VOLTAGE SHEET

...............................................................................................................................

2-13

• BLOCK DIAGRAM

....................................................................................................................................

2-15

• SCHEMATIC DIAGRAMS

.........................................................................................................................

2-17

• PRINTED CIRCUIT DIARGAMS

...............................................................................................................

2-25

SECTION 3. DVD PART

• ELECTRICAL TROUBLESHOOTING GUIDE

...........................................................................................

3-1

• BLOCK DIAGRAMS

.....................................................................................................................................

3-8

• SCHEMATIC DIAGRAMS

..........................................................................................................................

3-11

• WAVEFORMS

...........................................................................................................................................

3-19

• PRINTED CIRCUIT DIAGRAM

.................................................................................................................

3-21

SECTION 4. MECHANSIM

..............................................................................................................

4-1

SECTION 5. EXPLODED VIEWS

...................................................................................................

5-1

SECTION 6. SPEAKER PART

........................................................................................................

6-1

SECTION 7. REPLACEMENT PARTS LIST

..................................................................................

7-1

SECTION 1. GENERAL PART

SERVICING PRECAUTIONS

NOTES REGARDING HANDLING OF THE PICK-UP

1. Notes for transport and storage

1) The pick-up should always be left in its conductive bag until immediately prior to use.

2) The pick-up should never be subjected to external pressure or impact.

2. Repair notes

1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.

2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board.

3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched.

4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.

5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort this.

6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.

- 1-2 -

Storage in conductive bag

Drop impact

NEVER look directly at the laser beam, and don’t let contact fingers or other exposed skin.

Magnet

How to hold the pick-up

Pressure

Cotton swab

Conductive Sheet

NOTES REGARDING COMPACT DISC PLAYER REPAIRS

1. Preparations

1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust.

2. Notes for repair

1) Before replacing a component part, first disconnect the power supply lead wire from the unit

2) All equipment, measuring instruments and tools must be grounded.

3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.)

4) To prevent AC leakage, the metal part of the soldering iron should be grounded.

5) Workers should be grounded by an armband (1MΩ)

6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband.

7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.

CLEARING MALFUNCTION

You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.).

Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of the volume knob for more than 3 seconds.

If you reset your unit, you must reenter all its settings(stations, clock, timer)

NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it.

2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.

- 1-3 -

Armband

Conductive Sheet

Resistor (1 Mohm)

VOLUME KNOB

DOWN

VOLUME

RESET jump wire

ESD PRECAUTIONS

Electrostatically Sensitive Devices (ESD)

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive

surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can

generate electrical charges sufficient to damage ESD devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD

devices.

6. Do not remove a replacement ESD device from its protective package until immediately before you are ready

to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials).

7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the

protective material to the chassis or circuit assembly into which the device will by installed.

CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER

SAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion

such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device).

- 1-4 -

- 1-5 -

SPECIFICATIONS

Power supply AC 220~240V, 50/60Hz

Power consumption 70W

[General]

Mass 10.2 Ibs(4.6kg)

External dimensions (W x H x D) 360 x 82 x 388mm(14.2 x 3.2 x 15.3 inches) Operating conditions Temperature: 5˚C to 35˚C, Operation status: Horizontal

Operating humidity 5% to 90%

Laser Semiconductor laser, wavelength 650nm

Signal system PAL 625/50, NTSC 525/60

Frequency response(audio) 4 Hz to 20 kHz

[CD/DVD] Signal-to-noise ratio(audio) More than 90dB(1kHz, NOP, 20kHz LPF/A-Filter)

Dynamic range (audio) More than 95dB

Harmonic distortion(audio) 0.15% (1kHz, at 12W position)

Video input 1.0V (p-p), 75Ω, negative syne., RCA jack

[Video] Video output 1.0V (p-p), 75Ω, negative sync., RCA jack

S-video output

(Y) 1.0V (p-p), 75Ω, negative sync., Mini DIN 4-pin

1 (C) 0.3V (p-p), 75Ω

Tuning Range 87.5 ~108MHz

Intermediate Frequency 10.7MHz

Signal-to Noise Ratio 50dB

Frequency Response 150~12,000Hz

AM(MW)

Tuning Range 530 ~1,810kHz

Intermediate Frequency 450MHz

Stereo mode 30W + 30W(8Ω at 1kHz, THD 1%)

[Amplifier]

Surround mode Front: 30W+30W

Center*: 30W Surround*: 30W +30W(8Ω at 1Hz, THD 1%) Subwoofer*: 30W(8Ω at 60Hz, THD 1%)

Inputs VIDEO 1, 2

Outputs VIDEO 1(AUDIO OUT): 2V

WOOFER: 2V

Satellite Speaker (FE-3500TE) Passive Subwoofer(FE-3500WE)

Type 1 Way 1 Speaker 1 Way 1 Speaker

Impedance 8Ω 8Ω

[Speakers] Frequency Response 120~20,000Hz 35~1,000Hz

Sound Pressure Level 84dB/W(1m) 83dB/W(1m)

Rated Input Power 30W 30W

Max. Input Power 60W 60W

Net Dimensions (W x H x D) 90 x 125 x 106mm 160 x 350 x 325mm

Net Weight 0.7kg 4.78kg

[Supplied

Accessories]

• Audio cable.......................................................................................................................................... 1

• Speakers ............................................................................................................................................. 6

• Remote control .................................................................................................................................... 1

• AM Ioop antenna ................................................................................................................................. 1

• Video cable.......................................................................................................................................... 1

• Speaker cables.................................................................................................................................... 5

• Batteries .............................................................................................................................................. 2

• FM antenna ......................................................................................................................................... 1

* Depending on the sound mode

settings and the source, there may be no sound output.

[Tuner]

- 1-6 -

LOCATION OF CUSTOMER CONTROLS

STANDBY/ON

FUNCTION TUNE/SKIP PLAY/PAUSE

OPEN/CLOSE

MEMORY TITLE

FM/AM MONO/ST.

STOP/CLEAR

MENU RETURN ENTER

VOL

PHONES

MENU/PREST

RDS

Disc Tray

FUNCTION button

SKIP/TUNE buttons

PHONE connector

MENU(MONO/STEREO) button

ENTER button

RETRUN (RDS) button

VOLUME controller

ARROW/PRESET joy stick

PALY/PAUSE button

STOP (MEMORY/CLEAR) button

TITLE (FM/AM)button

RESET button (located at the bottem, see page 46.)

OPEN/CLOSE button Remote sensor

POWER button

and indicator

PCM

MUTE DIGITAL PRO LOGIC

DVD

VCD

MP3

HALL1

THEATER

HALL2

dts

RDS

TITLE

REPEAT

CHP/TRK

MEMORY PROGRAM

ms dB

MHz

kHz

ALL

ABSLEEP

TUNED STEREO

Sound mode indicator

RDS indicator

PROGRAM indicator

SLEEP indicator

TUNED indicator

STEREO indicator

MUTE indicator

MEMORY indicators

Chapter/Track number indicator

Title number indicator

PALY/PAUSE indicator

Angle icon indicator

Disc indicator

Total playing time/Elapsed time/ Frequency/Delay time/ Volume etc. indicators

Repeat playback

mode indicators

FRONT PANEL

DISPLAY WINDOW

- 1-7 -

FM 75Ω Coaxial Antenna Connector

MONITOR OUT Connector

AM Antenna Connector

SPEAKER Connectors

VIDEO 1(Input/Output) Connectors

VIDEO 2(Input) Connectors

S-VIDEO OUT Connector

WOOFER OUT Connector

POWER CORD Connect to an AC 230V, 50Hz outlet only.

VIDEO SELECTOR Switch

R L

75‰

GND AM

AUTO-NTSC-PAL

VIDEO

SELECTION

S-VIDEO

OUT

AUDIO

WOOFER

OUT

VIDEO 2

VIDEO

IN IN

REAR

‰

)

WOOFER

‰

)

CLEAR

FRONT

SPEAKER

(8‰)

OUT

VIDEO 1

MONITOR

OUT

REAR PANEL

- 1-8 -

REAR PANEL

• you will find instructions for each of the remote control functions in the appropriate sections of this instruction

manual.

POWER

MUTE

FM/AM

CD/DVD VIDEO 1

PRESET

VOLUME

PLAY

PROG. REPEAT.

PAUSE

STEP

TEST

TONE

SOUND

MODE

BY PASS

LEVEL

DISPLAY

SET-UP

AUDIO

REV.

FWD

ENTER

ANGLE

S-TITLE

REPEAT

ZOOM

CLEAR

MARKER

SLOW SCAN

TITLE

A - B

RETURN

DELAY

STOP

SKIP

13245

68790

VIDEO 2 SLEEP

POWER button

MUTE button VIDEO 1 buttonVIDEO 1 button SLEEP button

VIDEO 2 buttonVIDEO 2 button

NUMBER buttons

STOP button

BY PASS button SOUND MODE button

TEST TONE button

DELAY button LEVEL button RETURN button

DISPALY button *MENU button*MENU button SET-UP button

SEARCH button

MARKER button

SLOW SCAN ( ) buttons

SKIP(*SEARCH) button

PREST(▲/▼) buttons

FM/AM button

CD/DVD button

VOLUME(▲/▼) buttons

PAUSE button

PROGRAM buttons

**ARROW buttons

ENTER button

ANGLE button

SUBTITLE button

REPEAT A-B button

ZOOM button

***TITLE button

CLEAR button

AUDIO button

PLAY button

*MENU button

Use the MENU button to display the menu screen included on DVD video discs.

***TITLE button

Use the TITLE button to display the title screen included on DVD video discs.

**Directional arrow buttons

(up, down, left, right) for use in highlighting a selection on a GUI menu screen, TITLE and MENU screen.

* Press and hold button for about two seconds for search function.

- 2-1 -

SECTION 2. AUDIO PART

ELECTRICAL TROUBLESHOOTING GUDIE

Turn power on.

Is power on?

Does initial read work?

Does it play?

Does it output audio?

Check power supply circuit.

Check laser circuit.

Check focus circuit.

Check disc.

Check tracking servo circuit.

Check audio circuit.

YES

- 2-2 -

2. AUDIO µ. COM Circuit

POWER ON

Does CD/DVD appear at FLT?

Does LOADING

appear at FLD?

Does it appear

DVD Error at

FLD?

Does Video1/2

FM 87.5 appear

at FLD?

OK.

Check

Connector(CN103)if

is normally.

Reconnet it.

Refer to SMPS

Refer to oscillator

Circuit.

Check DVD Reset Waveform.

Check IC101 Reset Wavefrom.

Check 3.3V line.

Check Power dection Circuit..

Check power part

of Main B/D.

Check oscillator

of x101.

Check if CN103

Pin is High.

Check if IC101 Pin is High.

Check if IC101 Pin

is high (3.3r).

Check if IC101 Pin

is High .

Replace IC 101.

Does no Dise or

Time appear at FLD?

Check if DVD an Audio

Micom Interface is OK.

Check power.

Check DVD Module.

Check SMPS.

- 2-3 -

3. Front Circuit (1/2)

POWER ON

LED OFF.

Is digitron

on normally?

Check if

the CN401

is OK.

Check if the

Front power is

OK(*1).

Check

if the IC401 OSC Pin

Wavefrom is

OK.

Check if the IC401 Pins

is OK(*2).

Check if the

R 427

OK.

Replace

R 427.

Refer to SMPS Part.

Reconnec it.

Check if the

VFD401 Pins

are OK.

Check

IC401 Pins , ,

Wavefrom

Refer to Micom Circuit.

Check Patten

and Resoldering.

Replace IC401.

Check if all Buttens

are OK.

Check if the

Volume is

OK.

Check if the

Headphone is

OK.

Check if the

Remocon is

OK.

Front B/D OK.

* 1: CN401 Pins

Pin 13: +5V

Pin 14: -32V

Pin 15: -28V

Pin 16: -32V

* 2: CN401 Pins

Pin 14: +5V

Pin 133: -32V

* 3: VFD401 Pins

F11 : -28V

F22 : -32V

- 2-4 -

Front Circuit (2/2)

Check

if the Power part of the

Front is OK.

Check if the

Power part of the

Front is OK.

Check if

R401~R415

OK.

Check if

CN401 Pins3, 4

Waverfrom

OK.

Check if

R430, R431

OK.

Refer to Micom

Circuit

Refer to Micom

Circuit.

Refer to

power(SMPS).

Refer to

power(SMPS).

Refer to SMPS part.

Refer to SMPS.

Replace R401~R415.

Replace R430, R431.

Check

if the Power part of the

Front is OK.

Check if the

Power Part of the

Front is OK.

Check if the

RMC401Volume

is OK (5V).

Check if the

Remocon waveform of

the CN401.

Check if the

CN401 pin11

is Low.

Check if

headphoneJack

in JK401 is

OK.

Refer to M-COM

Circuit.

Check Main B/D.

Replace RMC 401.

Check RMC Circuit.

Refer to Micom

Circuit.

Check JK401 Circuit.

- 2-5 -

DVD PLAYER PROGRAM DOWNLOAD METHOD

1. DVD player without CD-RW option

1-1) Download the DVD program from your PC as following procedure

ACTION FLD display

• Plug the Power cord out

• Connect the Fixture for download (Refer to Deck Mechanism Adjustment)

• Execute the prgram for download(Flashrom.exe)

• Open the DVD program file

• Plug the Power cord in

• Press the MENU Key on the Remote controller FLASH

• Select Down icon with injector icon then start

download from the P.C

■ In status of download

• Erased the Flash memory FLASH ERA

• Written the Flash memory FLASH XX(XX: Program counter)

• Verified the Flash memory FLASH XX(XX: Program counter)

• Completed the download FINISHED

■ If an error was occurred during download, do not unplug the Power cord, and retry the download form the P.C until it is completed.

2. DVD player with CD-RW option(for models using C-CUBE MPEG chip, marking on the IC is ZIVA)

2-1) Make the DVD program upgrade Disc as following procedure

*Recommended S/W: adaptec Easy CD Creater *use file format: ISO9660

• Rename the souce file from the P.C to FIRMWARE.BIN (Ex, If Source file is lg_a3_korea.bin, rename to FIRMWARE.BIN)

• Format the CD-RW Disc as below Make the Folder name to UPGRSADE.DVD under root folder (Ex, UPGRADE.DVD)

• Download the source file renamed to FIRMWARE.BIN in the folder (Ex, UPGRADE.DVD FIRMWARE.BIN)

- 2-6 -

2-2) Insert the upgrade Disc into the DVD player slot, then the DVD player reads the

Disc and upgrade the Firmware itself as followings

Status FLD display on DVD player

• Detect the upgrade Disc No display

• Read the Disc Cd rEAD XX(XX: Program counter)

• Erased the Flash memory FLASH ERA

• Written the Flash memory FLASH XX(XX: Program counter)

• Verified the Flash memory FLASH XX(XX: Program counter)

• Completed the upgrade FINISHED

Note: After completed, plug the Power cord out and in again, and then press the Open key, then the

Disc will be ejected.

Caution: While CD detecting and reading, if Open key or Power is pressed Then download

procedure will be aborted.

3. DVD player with CD-RW option (for models using NS MPEG chip, marking on the IC is PANTERA)

3-1) Make the DVD program upgrade Disc as following procedure

*Recommended S/W: adaptec Easy CD Creater

*use file format: ISO9660

• Format the CD-RW Disc as below. Make the Folder name to “lg_dvd UPGRADE lg” under root folder ( lg_dvd_firmware upgrade lg)

• Download the source file in the folder (Ex, If the source file is “lg_a3_korea.bin, “lg_dvd firmware upgrade lg lg_a3_korea.bin”)

3-2) UPgrade the firmware for DVD player as followings

ACTION FLD display on dvd player

• Insert the upgraded Disc into the DVD player solt Press Up then starts the detecting

• Press the UP key on the Remote controller READ 0(If error is occurred, displayed then starts the reading retry counter)

- Starts the upgrading UPGRADE 0(If error is occurred, displayed

retry counter)

- Completed the upgrading FINISHED ➞ checksum

- Opened the Tray Disc (“FINISHED ➞ checksum” is displayed

repeatedly at 2 second intervals)

• Plug the Power Cord out

Note: In the status of FLD with “READ 0” or “UPGRADE 0”

If an error is occured, the read counter, “READ 0”, shows retry counter or “ERROR num” If the num has 0~2, retry the firmware upgrade procedure. If the error is continued after retrying 5 times, replace the Flash ROM IC.

W W W

W W

W W W W

- 2-7 -

WAVEFORMS OF MAJOR CHECK POINT

• IC 703 pin

• SPDIF signal woveform during normal play.

• IC 703 pin

• Serial data output wavefrom during normal play.

(

2V/Div. 500nS/Div.

(

2V/Div. 500nS/Div.

(

2V/Div. 500nS/Div.

384kHz

(

2V/Div. 500nS/Div.

(

2V/Div. 500nS/Div.

1) 2)

• IC 202 pin

• L/R clock data input wavefrom during normal operation.

• IC 202 pin

• Bit clock data input waveform during normal operation.

3) 4)

• IC 202 pin , , ,

• PWM data output wavefrom during normal operation.

28 29

- 2-8 -

INTERNAL BLOCK DIAGRAM OF ICs

■ CXP 84332

■ PIN DESCRIPTION

A/D CONVERTERAN0 to AN7

AVss

REF

PI0/INT0

INTERRUPT CONTROLLER

PI1/INT1

PI2/INT2

PI3/INT3

PE3/NMI

PE4/PWM

PE2/RMC

PB1/CS0

PB3/SI0

PB4/SO0

PB2/SCK0

PB6/SI1

PB7/SO1

PB5/SCK1

PE0/EC0

PE5/TO

PB0/CINT

PE1/EC1

14 BIT PWM GENERATOR

REMOCON

SPC700

CUP CORE

CLOCK GEN./

SYSTEM CONTROL

PA0 to PA7

PB0 to PB6

PB7

PC0 to PC7

PD0 to PD7

PE0 to PE3

PE4 to PE5

PF0 to PF7

PG0 to PG7

PH0 to PH7

PI0 to PI7

TEXTXEXTAL

XTAL

RST

VDDV

PORT A

ROM

32K/40K BYTES

PRESCALER/

TIME BASE TIMER

32kHz

TIMER/COUNTER

RAM

1120 BYTES

SERIAL INTERFACE UNIT 1

16 BIT CAPTURE

8 BIT TIMER 1

8 BIT TIMER/COUNTER 0

TIMER/COUNTER 2

FIFO

SERIAL

INTERFACE

UNIT 0

PORT BPORT CPORT D PORT EPORT FPORT GPORT HPORT I

2 2

symbol I/O Description

PA0/AN0

I/O/Analog input Analog inputs to A/D converter.(8 pins)

PA7/AN7

PB0/CINT I/O/Input External capture input to 16-bit timer/counter.

PB1/CS0 I/O/Input Chip select input for serial interface(CH0).

PB2/SCK0 I/OI/O Serial clock I/O (CH0).

PB3/SI0 I/O/Input Serial data input (CH0).

PB4/SO0 I/O/Output Serial data Output (CH0).

PB5/SCK1 I/OI/O Serial clock I/O (CH1).

PB6/SI1 I/O/Input Serial data input (CH1).

PB7/SO1 Output/Output Serial data Output (CH1).

PC0 to PC7 I/O

(Port C) 8-bit I/O port. I/O can be set in a unit of single bits. Capable of driving 12mA sink current. Incorporation of Pull-up resistor can be set through the software in a unit of 4 bits. (8 pins)

(Port A) 8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of the pull-up resistance can be set through the software in a unit of 4 bits. (8 pins)

(Port B) Lower 7-bit I/O port in which I/O can be set in a unit of single bits. Also, an uppermost bit (PB7) exclusively for output. Incorporation of pull-up resistor can be set through the software in a unit of 4 bits. (8 pins)

- 2-9 -

symbol I/O Description

PD0 to PD7 I/O

PE0/EC0 Input/Input

External event inputs for timer/counter.(2 pins)

PE1/EC1 Input/Input

PE2/RMC Input/Input Remote control reception circuit input.

PE3/NMI Input/Input Non-maskable interruption request input.

PE4/PWM Output/Output 14-bit PWM output.

PE5/TO/ADJ Output/Output/Output

Rectangular wave output for 16-bit timer/counter. Output for 32kHz oscillation frequency demultiplication.

PE0 to PF7 I/O

(Port F) 8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-up resistor can be set through the software in a unit of 4 bits (8 pins)

PG0 to PG7 I/O

(Port G) 8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-up resistor can be set through the software in a unit of 4 bits (8 pins)

PH0 to PH7 I/O

(Port H) 8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-up resistor can be set through the software in a unit of 4 bits (8 pins)

I/O/Input

(Port I) 8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-up resistor can be set through the software in a unit of 4 bits (8 pins)

PI4 to PI7 I/O External interruption request inputs.

EXTAL Input Crystal connectors for system clock oscillation. When the clock is supplied

XTAL Output externally, input to EXTAL; opposite phase clock should be input to XTAL.

TEX Input

Crysal connectors for 32kHz timer/counter colck oscillation circuit. Connect a 32kHz crystal oscillator between TEX and TX.

TX Output

For usage as event input, connect clock oscillation source to TEX, and open TX.

RST Input Low-Ievel active, system reset.

NC NC. Under normal operating conditions, connect to V

REF

Input Reference voltage input for A/D converter.

A/D converter GND.

Positive power supply.

GND

(Port E) 6-bit port. Lower 4 bits are for inputs; upper 2 bits are for outputs. Incorporation of pull-up resistor can be set through the software. (8 pins)

(Port D) 8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-up resistor can be set through the software in a unit of 4 bits. (8 pins)

PI0/INT0

PI3/NT3

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