Hi,
Can anybody tell what is the function of crawl mode in an integrated memory controller?

Hi,

Smells like homework to me!

You did google, right?

Try 'Intel memory controller' in google search engine'. You will find a link to a datasheet for the controller. Read and then asked about you don't understand.

Thanks for the link.

Here is the piece of stuff I read, the specification does mention that there is a crawl mode but whats the purpose is not mentioned.

"The fully programmable DDR SDRAM controller, integrated in the PowerQUICC III™ processor, supports most first-generation JEDEC standard ×8 or ×16 DDR memories available (No direct support for x4 DDR memories), including buffered and unbuffered DIMMs. The Clock frequency is up to 166MHz. Built-in error checking and correction (ECC) ensures very low bit-error rates for reliable high-frequency operation. The integrated memory controller supports dynamic power management and auto-precharge modes. A large set of special features, including DLL software override, crawl mode, and ECC error injection support rapid system debug".