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