Digital Main Processor (Ad6525, U100) - LG C3100 Service Manual

3. TECHNICAL BRIEF

3.5 Digital Main Processor (AD6525, U100)

(1) Architecture Overview
The internal architecture of AD6525 is shown in Figure 3-8. AD6525 regroups three main
subsystems connected together through a dynamic and flexible communication by network.
It also includes onboard system RAM (SRAM) and interfaces with external Flash Memory,
Baseband converter functions, and terminal functions like MMI, SIM and Universal System
Connector (USC).
The Digital Signal Processing (DSP) subsystem primarily hosts all the speech processing,
channel equalization and channel codec functions. The code used to implement such functions
can be stored in external Flash Memory and dynamically downloaded on demand into the DSP's
program RAM and Instruction Cache.
AD6525
Subsystem
PBUS DMA and BUS
ARBITRARION
Peripheral
Subsystem
(ARM7TDMI
RF-Control
MMI
USC
Figure 3-8. Block Diagram of the AD6525 Internal Architecture
DSF
Serial Link
DSP BUS
RBUS
SBUS
MUC
SRAM
Subsystem
®
)
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AD6525
(VBC)
EBUS
FLASH