Samsung SGH-P408, Руководство по обслуживанию

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SGH-P408 Circuit Description
2- 4
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4. Vibrator Motor Dirver
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 enabled by EN_VIB, and its voltage setting is
determined by VIB[0:2]. Provided EN_VIB is a logic 1, the driver can be
programmed to maintain a motor voltage of 1.1V to 2.5V in 20mV steps and
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 STN LCD) and small LCD(4-gray
LCD). Chip select signals of EMI part in the trident, CLCD_EN_FO and
GLCD_EN_FO,
can enable Each LCD. LED_EN_FO signal enables white LED of main LCD
and EL_EN_FO signal enables EL of small LCD.
These two signals are from IO part of the DSP in the trident. RST signal
from 2006 initiates the initial process of the LCD.
16-bit data lines(D(0)_FO~D(15)_FO) transfers data and commands to LCD
through emi_filter. Data and commands use A(2)_FO 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_FO signal is used to write
data or commands to LCD.
Power signals for LCD are V_bat and V_ccd.
SPK1P and SPK1N from CSP1093 are used for audio speaker. And
VIB_EN_FO from 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.