STM32H747 DMA Memory Size?

[Joseph.Paul]

Per spec. STM32H747 has 1MB on-chip memory available. However, how that memory mapped is something I don't quite know. Linker allocates 256K @ 0x2000000 for code, and there's some DMA memory @ 0xD000000, but it's size is mystery as there's no explicit definitions for it.

[AScha.3]

The H747 has 

The address you can read in rm , if you like :

-> see rm for your chip

DMA can access all memory, but not in one dma transfer, 65K limit, just look in rm :

[Tesla DeLorean]

It's a transaction size, could be 65535 * 32-bit words, and perhaps has a double buffer model so can ping-pong between two such buffers.

Ideal situation you're not moving that much data around, or there are better ways to manage it.