Samsung SGH-X490 Service Manual page 22

Block Diagrams
5-2. Base Band Solution Block Diagram
MIC
RECEIVER
SPEAKER
VIBRATOR
MELODY IC
(40 Poly)
SYSTEM CLOCK
(13MHz)
LCD
KEY_BOARD
OM6359
Li-Ion Battery
(Standard)
RTC_CLOCK
Charging Circuit
(32.768KHz)
5-2
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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
VDD_AMP
AVDD
AVDD_TEMP
BL_VDD