For detached DMA's there are two addressing approaches. One is dual-address and one is implicit. What the difference between the two and why does dual-address take twice as many bus cycles?
Electronic – What’s the difference between dual-address and implicit DMA
dmamicrocontroller
Related Solutions
The Cortex M series all fit into the microcontroller family, that is they are specifically optimised for smaller, specific, time-sensitive applications. Because they have a more specific job, they typically don't have as much memory.
The Cortex A series are more of a general-purpose embedded type core, that you would find in a smartphone or a tablet or other SOC's. They typically favor higher performance and functions that are more suitable for running an OS such as Android.
Note that both of these are just families of processor cores, they aren't the actual processor bundles including memory and device interfaces. You didn't really provide much information about what you're looking for, but if I had to pick a hardware platform for rich multimedia and streaming, it would be an SOC that had the A-series core in it for performance reasons.
On page 13 of the datasheet, you can see the Order codes and what they mean.
In this case, H and U mean the finish or plating on the pins.
Related Topic
- Electronic – Understanding difference between Interrupt Address and interrupt vector address
- Electronic – STM32 SPI DMA timings between data frames and multiple DMA profiles
- Electronic – the difference between a buzzer and a speaker and are there any other basic electric/electronic things that output sound
- Electronic – Multiple I2C devices with the same address
Best Answer
In dual-address DMA, the data transfer takes two cycles: The DMA controller first puts the source address on the bus, reads the data, and then puts the destination address on the bus and writes the data. The source and destination can each be either memory or a peripheral register.
In implicit-address DMA, a peripheral makes a DMA request to the DMA controller. The DMA controller puts the memory address on the bus and the peripheral transfers the data directly to/from memory in a single cycle. This type of DMA cannot support peripheral-to-peripheral or memory-to-memory DMA.