Samsung SGH-X430 Instrukcja Użytkownika Pobierz pdf (Strona 8)

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2. SGH-X430 Circuit Description

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4. Vibrator Motor Driver

The vibrator motor driver is a low-side, programmable voltage source

designed to drive a small dc motor that silently alerts the user of an

incoming call. The driver is controlled by VIB[0:1] and can be programmed

to maintain a motor voltage of 1.3V, 2.0V, or 2.5V(relative to V

BAT

) while

sinking up to 100mA. For efficient use, the vibrator motor should be

connected between the main battery and the VIB_DRV output.

2) Connector

1. LCD Connector

LCD is consisted of main LCD(color 65K UFB LCD). Chip select signals of

EMI part in the trident, CLCD_EN, can enable main LCD. LED_EN signal

enables white LED of main LCD and EL_EN signal enables dimming mode

of main LCD.

These two signals are from IO part of the DSP in the trident. RST signal

from 2106 initiates the initial process of the LCD.

16-bit data lines(D(0)~D(15)) transfers data and commands to LCD through

emi_filter. Data and commands use A(2) signal. If this signal is high, Inputs

to LCD are commands. If it is low, Inputs to LCD are data. The signal

which informs the input or output state to LCD, is required. But this system

is not necessary this signal. So CP_WEN signal is used to write data or

commands to LCD.

Power signals for LCD are +VBATT and VCCD.

SPK1P and SPK1N from CSP1093 are used for audio speaker. And

YMU_VIB_EN from MA-3 enables the motor.

2. JTAG Connector

Trident has two JTAG ports which are for ARM core and DSP

core(DSP16000). So this system has two port connector for these ports.

Pins' initials for ARM core are 'CP_' and pins' initials for DSP core are

'DSP_'.

CP_TDI and DSP_TDI signal are used for input of data. CP_TDO and

DSP_TDO signals are used for the output of the data. CP_TCK and

DSP_TCK signals are used for clock because JTAG communication is a

synchronous. CP_TMS and DSP_TMS signals are test mode signals. The

difference between these is the RESET_INT signal which is for ARM core

RESET.

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Samsung SGH-X430 Instrukcja Użytkownika Strona 8