Simply Put: What is Direct Memory Access (DMA) in Embedded Systems

Like your series of videos. Here, I think you're describing a DMA controller rather than DMA in a broader sense, which just means direct memory access. In some DMA designs it's possible for a peripheral to directly control the memory lines and write directly to the data bus/main memory. In either cases, the operation would occupy the data bus, and unless the CPU has useful data in its cache or pipeline, the CPU would stop. One example I'm familiar with is the blitterchip in the Atari ST.

[@dontknow8835]

Pretty good and simple video explaining DMA

[@tchitchouan]

Very educational and informative.

[@BubblegumCrash332]

Good to have you back 👍

[@ZygalStudios]

Glad to be back!

[@nicholascarroll2821]

I understand it now!

[@newvocabulary]

Oh my, an actually interesting youtube video in my feed. This must be a mistake....

[@one_up907]

Do you do any game development?

[@ZygalStudios]

Why yes, in fact I do! Embedded software is my career, but video game development is one of my hobbies. I'm lucky that there are many similarities in problem solving between the two disciplines.

[@jh5124]

Can you do one on scratchpad memory vs regular cache memory?

[@ZygalStudios]

Yes! Absolutely!

[@zzco]

First! :p

[@A31Chris]

I had an Athlon64 3800+ processor 2.4 ghz. It was rated at the equivalent of a contemporary 4ghz intel processor at the time. Can you explain sometime why the same bit/speed processor can outperform a different processor of the same bit and speed?