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SAMSUNG Proprietary-Contents may change without notice
Circuit Description
2-3
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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.
B. Connector
1. LCD Connector
LCD is consisted of main LCD(color 65K UFB LCD) and small LCD(B/W). Chip select
signals, LCD_MAIN_CS and LCD_SUB_CS, can enable Each LCD. Backlight signal enables
white LED of main LCD and 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 through by pass
capacitor.
"SPK_P" and "SPK_N" from OM6357 are used for audio speaker. And "VDD_VIB" from
PCF50601 enables the motor.
2. 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, A3210ELH. A magnet under main LCD enables A3210ELH.
3. EMI ESD Filter
This system uses the EMI ESD filter, EMIF09 to protect noise from IF CONNECTOR part.
4. IF connetor
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.