SAMSUNG Proprietary-Contents may change without notice
SGH-E700 Circuit Description
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2-
3
"RESET_2V8" signal initiates the Reset process of the LCD.
16-bit data lines(LD(0)~LD(15)) transfers data and commands to LCD through by pass capacitor. Data and commands use
"RS" 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 "L_WR" signal is
used to write data or commands to LCD. Power signals for LCD are "VBAT" and "VDD2".
"SPK_P" and "SPK_N" from OM6357 are used for audio speaker. And "VDD_VIB" from PCF50601 enables the motor.
2-3. IRDA
This system uses IRDA module, HSDL_3208, Agilent's. 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.
2-4. 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 seperated 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.
2-5. EMI ESD Filter
This system uses the EMI ESD filter, EMIF09 to protect noise from IF CONNECTOR part.
2-6 IF connetor
It is 18-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.
3. 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.
when fault condition caused, "CHG_ON" signal level change low to high and charger IC stop charging
process.
4. Audio
EARP_P and EARP_N from OM6357 are connected to the main speaker. AUXSP is connected to the Hands free kit.
MIC_P and MIC_N are connected to the main MIC. And AUX_MIC_P and AUX_MIC_N are connected to the Hands
free kit.
YMU762MA3 is a LSI for portable telephone that is capable of playing high quality music by utilizing FM synthesizer
and ADPCM decorder that are included in this device.
As a synthesis, YMU762MA3 is equipped 32 voices with differenttones. Since the device is capable of simultaneously
generating up to synchronous with the play of the FM synthesizer, various sampled voices can be used as sound effects.
Since the play data of YMU762MA3 are interpreted at anytime through FIFO, the length of the data(playing period) is
not limited, so the device can flexiblysupport application such as incoming call melody music distribution service.
