TMS320C6748: L2 as a cache and RAM

Shrikrishna B

Part Number: TMS320C6748

Hello,

In TRM of C6748 it is mentioned that L2 memory can be used as a cache as well as RAM.

So if I configure L2 (total 256KB), as a cache for 128KB and remaining 128KB as a RAM, then which region will be cached and which will be used as a RAM? Is this possible, or L2 can not be used as a cache or RAM at a time.

L2 starts at 0x11800000.

Thanks!

over 7 years ago

0 Cvetolin Shulev-XID over 7 years ago

TI__Guru 65405 points

Hi Shrikrishna,

I've forwarded this to the design experts. Their feedback should be posted here.

BR
Tsvetolin Shulev

0 Senthilkumar Srinivasan over 7 years ago

TI__Mastermind 43660 points

Shrikirishna,

From my understanding, You can configure L2 memory as cache for 128KB and RAM for 128KB. You can partition the memory space equally and configure in either way.

Regards,
Senthil

0 Rahul Prabhu over 7 years ago

TI__Guru** 115880 points

Please look at the C674x Cache user guide here:
www.ti.com/.../sprug82a.pdf

When you configure L2 as part cache as you have described then the top 128 KB of the L2 memory will be used as cache. RAM will start at 0x11800000.

0 Shrikrishna B over 7 years ago in reply to Rahul Prabhu

Prodigy 170 points

Thank you Rahul. It worked, I think I missed to check cache guidelines.

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TMS320C6748: L2 as a cache and RAM