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3-2
SIM Card CLOCK Serial Data GSM/DCS Interface
VOCODER
SYSTEM +3V SIM Card
Memory +5V SIM Card
I/O Interface B.B Interface Battery Voltage A/D Interface
3-2 Main Base Band
SYSTEM RAM 4M
FLASH Battery Temperature ROM 16M I/O BB Filter GSM/DCS GSM/DCS PLL GSM PLL
EEPROM 128K RF interface
KERNEL 5
DCS PLL 3V Tx Multi GSM Tx Recognition) DCS Tx
8M ROM (Voice Switch Array
Charging Circuit
RF PSU
GSM PSU KeyPad POWER Circuit DCS PSU AVCC
Graphic LCD Li_lon Battery (3.6V) (115*60) VCC
Block Diagrams
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