It is a custom digital baseband architecture (DBB). It consist from:
1) DSP Processor - TMS320C55x+ - based
2) MCU (general purpose processor) - ARM9 - based
Both communicated with each other over the shared memory
Source DIA file: Wrigley3G
As and AP (OMAP3430) Wrigley3G use one memory chip, but another partition.
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