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AM2732-Q1: Factors affecting the computing power of AM2732 DSP (performance cannot be met)

b l
Prodigy 30 points

Part Number: AM2732-Q1

Tool/software:

1. I have set the L2 cache to 64K, and I would like to know the frequency difference between the shared RAM of DSS L2 and DSS L3?
DSS L2 RAM only has 320K, which is not enough (stack 300K is placed here). Other data and. text are placed in DSS L3 (guess this is the reason?)
Testing also found that the performance will decrease significantly when placed in L3 (changing the stack position). How can we optimize it?

2. How to change the CPU clock speed? The change here is still 400MHz.