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differentiation feature phone <-> smartphone
feature phone: single CPU: GSM stack + UI on one CPU
smartphone: dual CPU: 'digital baseband' + 'application processor'
we will look at some smartphones
Openmoko GTA02 (FreeRunner)
E-TEN glofiish M800/X800
Motorola EZX (A780/A1200/Rokr E6)
Major components
show GTA02 SimpleComponentDiagram
anatomy of the GSM side:
CPU (ARM7 for 2G, ARM9 for 3G)
DSP
ADC/DAC
RF PA
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