11.1.5 Addressing Modes

The DMA Controller also supports transfers between single addresses or address ranges. The four basic options are:

• Fixed-to-Fixed: Between two constant addresses
• Fixed-to-Block: From a constant source address to a range of destination addresses
• Block-to-Fixed: From a range of source addresses to a single, constant destination address
• Block-to-Block: From a range of source addresses to a range of destination addresses

The option to select auto-increment or auto-decrement of source and/or destination addresses is available for Block Addressing modes.

In addition to the four basic modes, the DMA Controller also supports Peripheral Indirect Addressing (PIA) mode, where the source or destination address is generated jointly by the DMA Controller and a PIA-capable peripheral. When enabled, the DMA channel provides a base source and/or destination address, while the peripheral provides a fixed range offset address.