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Linux/AM5728: Questions about device

Part Number: AM5728

Tool/software: Linux

Hi TI Experts, 

I have below questions about AM5728

Q1. Can MPU and DSP run at the same time and independently?

Ex : Run Linux in MPU, Run RTOS in DSP at the same time?

Q2.Can I use DSP of AM5728 as CPU function?

Q3.There are three kind of OS provided in TI.com (below list), is there any rule to use these OS in MPU & DSP of AM5728 ?

(1) Linux Processor SDK for AM57x

(2) Linux-RT Processor SDK for AM57x

(3) RTOS Processor SDK for AM57x

For exampie : Linux only can used in MPU, or RTOS only used in DSP ?

If yes, could you please provide the limitation rule to me?

Q4. For above three OS, do these OS support all the TI processor (A9, A15, A53...) ?

Q5. If we want to study TI RTOS and use a simple EVM to implement.

       Could you suggest simplest/cheapest EVM to me?

Thanks a lot.

Derek