Lcd Connector - Samsung SGH-E100 Service Manual

1.3 Clock Generator
The Clock Generator (CG) generates all clocks for internal and external usage. The 32768 Hz
crystal oscillator provides an accurate low clock frequency for the PCF50601 and other circuitry.

2. LCD Connector

LCD is consisted of main LCD(color 65K TFT LCD) and small LCD(B/W). Chip select
signals, LCD_MAIN_CS and LCD_SUB_CS, can enable Each LCD. LCD_MAIN_CS signal
enables white LED of main LCD and LCD_SUB_CS signal enables the small LCD.
"RESET_2V8" signal initiates the Reset process of the LCD.
16-bit data lines(HD(0)~HD(15)) transfers data and commands to LCD.
"SPK_P" and "SPK_N" are used for audio speaker. And "VDD_VIB" from PCF50601 enables
the motor.
3. IRDA
This system uses IRDA module, HSDL_3201. This has signals, "IRDA_DOWN"(enable signal),
"RXD0"(input data) and "TXD0"(output data). These signals are connected to OM6357.
It uses two power signals. "VDD2" is used for circuit and "VBAT" is used for LED.
4. Key
This is consisted of key interface pins among OM6357, KBIO(0:7). These signals compose the
matrix. Result of matrix informs the key status to key interface in the OM6357. Power on/off
key is separated from the matrix. So power on/off signal is connected with PCF50601 to enable
PCF50601. twelve key LED use the "VBAT" supply voltage. "VDD_KEY" signal enables
LEDs with current control. "FLIP" informs the status of folder (open or closed) to the OM6357.
This uses the hall effect IC, A3212ELH. A magnet under main LCD enables A3212ELH.
5. EMI ESD Filter
This system uses the EMI ESD filter, EMIF09 to protect noise from IF CONNECTOR part.
6. IF Connector
It is 24-pin connector. They are designed to use VBAT, V_EXT_CHARGE, TXD0, RXD0,
RTS0, CTS0, JIG_REC, CHARGER_OK, RXD1, TXD1, AUX_MIC, AUX_SPK and GND.
They connected to power supply IC, microprocessor and signal processor IC.
7. Battery Charge Management
A complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries.
If TA connected to phone, "V_EXT_CHARGE" enable charger IC and supply current to battery.
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SG H- E 100 Circuit Description