Download - SGH-X640 SVC TRAINING H/W BASEBAND PART
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SGH-X640 SVC TRAININGH/W BASEBAND PART
MINSOO, LEE
DATE : 10 . MAR . 2005PLACE : GUMI, KOREA
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CONTENTS BLOCK DIAGRAM PLACEMENT DIAGRAM BASEBAND PART
Power on Memory Camera Melody Charging part SIM Microphone Earpiece Key
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BLOCK DIAGRAM
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MAJOR COMPONENT – PBA TOP VIEW Antenna pad
Antenna Switch
PAM
TX VCO
32KHz OSC.
PMIC
SIM connector
Dual LDO
ESD Protection IC
Backup BAT.
Audio-MelodySwitch
RF main chip
VC-TCXO(26MHz)
LCD connector
BB main chip
Backend IC
Memory
Melody IC
Charging IC
SAW filter
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MAJOR COMPONENT – PBA BOTTOM VIEW
Hall IC
Key load switch
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POWER ON JIG
VBATCHARGER_OKPMIC(AUXON)PMIC(RSTON) OM6357
DEVICE RECOGNITION REC1,REC2, REC3
RESET SIGNAL Memory --- VDD3 Camera --- IMAGE_RESET Melody --- M_RST LCD --- RESET_2.8V
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32KHz Clock system clock and SIM clock
RSTON Active-Low reset for in / external circuitry supplied
by DVDD1. The RSTON keeps HIGH after the power supply modules are enabled.
POWER ON
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MEMORY - schematic
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MEMORY - comment
Structure 128M ROM + 128M NAND + 64M SCRAM
Chip selection CS_NAND, NCSFLASH, HA(23)
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CAMERA - schematic
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CAMERA - comment
Signal IMAGE_INT : recognize the event HWR_N, HRD_N : write/read on the backend IC HD(0:15) : OM6357, memory data LD(0:15) : LCD data Y(0:7) : YUV image data from image sensor module
to Alpha chip(MV317SAQ) Standby: idle, active control signal
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MELODY - schematic
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MELODY - comment
Signals MEL_13M : Driving clock from VC-TCXO AMP_N, AMP_P : Output from Yamaha Melody IC HWR_N, HRD_N : write/read enable HD(0:7) : melody data
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CHARGING PART - schematic
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CHARGING PART - comment
Signals V_EXT_CHARGE : supply from the TA around 5.0V,
550mA CHARGER_ON : charger existence. CHG_ON : control charger pin. If stopping charging, it
would be HIGH. MES_BATT : indicating battery voltage level. END_OF_CHARGE : charger status pin.
In charging mode : HIGH Full charged mode : LOW
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SIM – schematic
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SIM - comment
Signals SIM_VCC : supply voltage for SIM card SIM_RST : reset for SIM card SIM_CLK : clock to SIM card SIM_IO : I/O line to/from SIM card
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MICROPHONE
Signals MIC_P, MIC_N : input from mic
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EARPIECE - schematic
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EARPIECE - comment
Signals JACK_EN M_SEL
JACK_EN M_SELAUDIO 0 0AUDIO 1 0
MELODY 0 1TMI 1 1
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ON/OFF, SIDE KEY - schematicONKEY
SIDE KEY
Signals ONKEY_N : controls Power ON and OFF KBIO(3), KBIO(4), KBIO(7)
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KEY DATA INPUT/OUTPUT - schematic
Signals KBIO(0:7) : key scanning procedure is fully processed
in the main CPU ‘SEND’ key : KBIO(0:1)
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KEY BACKLIGHT
Signals VDD_KEY : controls ON/OFF, supply voltage for LEDs
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QUESTION