TMDSCNCD28388D: The difference between "RAM init" and "Clear RAM for boot stack"

yeyuan zhu

Part Number: TMDSCNCD28388D

Hi, I saw the "RAM init" and "Clear RAM for boot stack" operations in TRM of 28388. would you mind telling me the difference between these two operations?

over 2 years ago

+1 Pawan Nayak over 2 years ago

TI__Expert 3755 points

Hi Zhu,

On POR reset all the RAMs are initialized. On XRSn reset only a subset of M0 RAM which is used for boot ROM stack is initialized.

Thanks and regards, Pawan

0 yeyuan zhu over 2 years ago in reply to Pawan Nayak

Prodigy 70 points

Thank you Pawan! I have also just found the section reserved for the Boot ROM stack in the cmd file!

I was also wondering if there are any difference between setting RAM to 0 using memset function and RAM inittialization described in the table?

Regards,

Zhu

+1 Pawan Nayak over 2 years ago in reply to yeyuan zhu

TI__Expert 3755 points

The RAM initialization described in the table initializes the entire RAM block using hardware. The memset function is a software write of 0 into memory.

Regards, Pawan

0 yeyuan zhu over 2 years ago in reply to Pawan Nayak

Prodigy 70 points

So, is it equivalent to RAM initilization if I set RAM to 0 with memset?

Regards,

Zhu

+1 Pawan Nayak over 2 years ago in reply to yeyuan zhu

TI__Expert 3755 points

Hardware RAMinit will initialize the entire selected RAM blocks and is faster. It is not possible to initialize a subset of RAM addresses using the hardware ram init. Memset function can be used to initialize range of memory addresses within a RAM and any value can be set.

Regards, Pawan

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TMDSCNCD28388D: The difference between "RAM init" and "Clear RAM for boot stack"