Samsung SGH-V200 Service Manual page 6

1.4. 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
2-1. 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.
2-2. 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.
2-3. IRDA
This system uses IRDA module, HSDL_3201, HP ¡¯ s. This has signals, IRDA_EN(enable signal), IRDA_RX(input data)
and IRDA_TX(output data). These signals are connected to PPI of trident. It uses two power signals. V_ccd is used for
circuit and V_bat is used for LED.
2-4. Keypad connector
This is consisted of key interface pins among PPI 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
PSC2006 to enable PSC2006. SVC_GREEN, SVC_RED and SVC_BLUE are from OCTL of CSP1093. These signals
decide the color of LED, service indicator. Eighteen key LED use the V_bat supply voltage. These are connected to
BACKLIGHT signal in the PSC2006. 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 key FPCB.
SAMSUNG Proprietary-Contents may change without notice
2- 3
SG H- V200 Circuit Description