Arria V Hard Processor System Technical Reference Manual

ID 683011
Date 12/02/2022
Public
Document Table of Contents

19.4.1.1. Master Interface

The master interface includes a built‑in DMA controller. The DMA controller moves data between external memory and the media access controller (MAC).

Properties of the master interface are controlled through the USB L3 Master HPROT Register (l3master) in the system manager. These bits provide access information to the L3 interconnect, including whether or not transactions are cacheable, bufferable, or privileged.

Note: Bits in the l3master register can be updated only when the master interface is guaranteed to be in an inactive state.