Samsung SGH-X640 Service Manual page 22

Block Diagrams
2. Base Band Solution Block Diagram
RECEIVER
SPEAKER
VIBRATOR
MIC
SYSTEM CLOCK
(13MHz)
KEY
CAMERA
MV317
LCD
MELODY IC
(40 Poly)
OM6359
MEMORY
NAND(128Mb)
NOR(128Mb)
SRAM(64Mb)
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Li-Ion Battery
Charging RTC_CLOCK
Circuit (32.768KHz)
BB Block Diagram of SGH-X640
5-2
BB INTERFACE
Serial Data
Interface
I/O
Interface
A/D
Interface
RF INTERFACE
AFC
RAMP
PMU
SIM CARD
Battery
Type
Battery
Voltage
Battery
Temperature
VCC_CP
VCC_SYN
VCC_RX_TX
VCC_RF_VCO
VCC_TX_BURST
VDD1
VDD2
VDD3
VDD_VIB
MIC_BIAS
VDD_KEY
SPVDD
AVDD
AVDD_TEMP
BL_VDD