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The ²ÝÁñÉçÇø AXI DMA controller is a highly optimized centralized AXI DMA IP component offering configuration of up to 32 channels for a range of applications.

A flexible, multi-interface, centralized AXI DMA controller (View Product Details for DW_axi_dmac):

• Independent core, subordinate interface, handshaking interface and manager interface clocks
• Configurable for up to 32 channels, one per source and destination pair
• Configurable for up to 64 handshaking interfaces
• Data transfers in one direction only (each channel is unidirectional)
• Supports AHB and APB4 protocols for Subordinate interface
• AMBA 3 AXI and AMBA 4 AXI protocols for Manager interface
• Support for up to 2 AXI manager interfaces
• Two manager interfaces for multilayer support
• Multiple AXI managers increase bus performance by allowing direct connection of peripherals on different AXI interconnects
• Support for different ACLK on different AMBA layers
• Data bus width up to 512 bits for manager interface
• Programmable outstanding transaction limit per channel on the manager interface
• Configurable AXI transfer width to support narrow transfer width 8, 16, 32, 64, ¡­, 512 bits
• Out-of-order transaction support for different channels connected on same manager interface
• Endian mode can be selected statically or dynamically for AXI manager interfaces
• Independent control for endian scheme of linked list access on manager interfaces
• AXI Unique ID support per channel to avoid the need for having re-ordering buffer at the SoC level
• Supports AXI Unaligned Transfers
• Support for Context Sensitive Low Power feature
• Programmable/configurable transfer type support for each channel (memory-to-memory, memory-to-peripheral, peripheral-to-memory and peripheral-to-peripheral)
• Programmable/configurable flow control support at DMA transfer level (DMA FC, Source FC, and Destination Flow Controller)
• Programmable multiblock transfer using Linked List, Contiguous Address, Auto Reload, and Shadow Register based
• Supports asynchronous Hardware handshake feature
• Separate external memory interface (per channel) to connect SRAM or Register File based memories to Channel FIFO
• Optional identification register
• Channel locking functionality Supports locking of the internal channel arbitration for the manager bus interface at different transfer hierarchy
• DMAC status indication outputs idle/busy indication

Helps users meet design requirements for safety-critical applications:

• Lock Step Protection feature
• Channel/Unique ID Memory ECC Protection
• AXI Interface ECC protection
• AHB/APB4 Interface Parity protection