Samsung GT-E2121B Service Manual page 34

7. Block Diagrams
7-1. Main Block Diagram
KEYPAD
MOTOR
SIM
OVP
BATTERY
MEMORY
IF CONNECTOR
GT-E2121B BLOCK DIAGRAM
GSM/GPRS Class 10 signal chip
32-bit ARM926EJ-S™ control processor
SAIC/TTY/CTM
Integrated DCXO and AFC correction
I2C/UART/PCM/PWM
Bluetooth/FM support
SIM card interface
Color LCD, up to 176x220 pixels, 65K colors
Analog accessory detection
Threeclock output(32KHz,26MHz,26/nMHz)
Up to 42 GPIOs(1.8V/2,8V)
78MHz burst memory access
PMU
BACK-END IC
AIT708U
Camera LCD
VGA CSTN
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PNX4852
SD CARD
7-1
RF Subsystem
Audio Subsystem
SPEAKER
EAR SPEAKER
RF SYSTEM
BLUETOOTH
FM RADIO
EAR MIC
MIC