Using dynamic RAM

[raivo]

All my microcontroller projects so far use static RAM for external memory. Now i want to try dynamic RAM in one project.

I have, maybe silly, question. Is it enough for reliable DRAM refresh to simply read data from every
row within specified refresh interval? If so then i can simply use timer interrupts to refresh memory. Is this ok?

Also, why some dynamic(?) RAMs are called pseudo-static?

Raivo

 

[cbarn24050]

Hi, yes that works fine.

 

[IRstuff]

While your processor could do the refresh, it seems to be a bit of a waste of processor throughput.

Psuedo-static DRAM have built-in refresh controllers, which freshes the memory in the background.

TTFN