Samsung SGH-X430 Bedienungsanleitung PDF herunterladen (Seite 9)

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2. SGH-X430 Circuit Description

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3. Keypad connector

This is consisted of key interface pins in the trident, KEY_ROW[0~4] and

KEY_COL[0~4]. These signals compose the matrix. Result of matrix informs

the key status to key interface in the trident. Some pins are connected to

varistor for ESD protection. And power on/off key is seperated from the

matrix.

So power on/off signal is connected with PSC2106 to enable PSC2106.

SVC_GREEN, SVC_RED and SVC_BLUE are from OCTL of CSP1093.

These signals decide the color of LED, service indicator.

Nine key LED use the +VBATT supply voltage. These are connected to

BACKLIGHT signal in the PSC2106.

This signal enables LEDs with current control. FLIP_SNS informs the status

of folder (open or closed) to the trident. This uses the hall effect IC,

A3210ELH.

A magnet under main LCD enables A3210ELH which is on the main PCB.

4. EMI Filtering

This system uses the EMI Filter to reduce noise from LCD part. Some

control signals are connected to LCD without EMI filtering.

3) IF connetor

It is 23-pin connector, and uses 18-pin at present. They are designed to use

SDS, DEBUG, DLC-DETECT, JIG_ON, VEXT, VTEST, VF, +VBATT and GND.

They connected to power supply IC, microprocessor and signal processor IC.

4) Audio

AOUTAP, AOUTAN from CSP1093 is connected to the speaker via analog

switch. AOUTBP and AOUTBN are connected to the ear-mic speaker via

ear-jack. MICIN and MICOUT are connected to the main MIC. And AUXIN and

AUXOUT are connected to the Ear-mic.

YMU762MA3 is a LSI for portable telephone that is capable of playing high

quality music by utilizing FM synthesizer and ADPCM decorder that are

included in this device.

As a synthesis, YMU762MA3 is equipped 16 voices with differenttones. Since

the device is capable of simultaneously generating up to synchronous with the

play of the FM synthesizer, various sampled voices can be used as sound

effects.

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Samsung SGH-X430 Bedienungsanleitung Seite 9