Vendor: Lattice Semiconductor Corp. Category: DMA

Scatter-Gather DMA Controller

Direct Memory Access (DMA) is a technique for transferring blocks of data between system memory and peripherals without a process…

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Overview

Direct Memory Access (DMA) is a technique for transferring blocks of data between system memory and peripherals without a processor (e.g., system CPU) having to be involved in each transfer. DMA not only offloads a system’s processing elements, but can transfer data at much higher rates than processor reads and writes.

Scatter-Gather DMA augments this technique by providing data transfers from one non-contiguous block of memory to another by means of a series of smaller contiguous-block transfers. The Lattice Scatter-Gather DMA Controller core implements a configurable, multi-channel, WISHBONE-compliant DMA controller with scatter-gather capability.

Key features

  • Supports up to 16 physical channels
  • Up to 8 sub-channels per physical channel
  • Four priority levels using round-robin arbitration (weighted or simple)
  • WISHBONE bus widths from 8 to 128 bits
  • Simple DMA, split transfers, scatter-gather
  • Direct interface to external RAM for packet buffering
  • Autonomous and hardware-directed retry
  • Supports WISHBONE burst and classic-cycle transfers
  • Supports centralized and distributed DMA control architectures

Block Diagram

DMA-SG block diagram

Files

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Specifications

Identity

Part Number
DMA-SG
Vendor
Lattice Semiconductor Corp.
Type
Silicon IP

Provider

Lattice Semiconductor Corp.
HQ: USA
Lattice Semiconductor Corporation provides the industry’s broadest range of Programmable Logic Devices ( PLD), including Field Programmable Gate Arrays ( FPGA), Complex Programmable Logic Devices ( CPLD), Mixed-Signal Power Management and Clock Generation Devices, and industry-leading SERDES products.
Contact Lattice Semiconductor Corp.

Learn more about DMA IP core

DMA IP Integration

There are many IP’s today . These IP’s can be simple IP’s like Timer to complex IP’s like Accelerators. In Most of the cases IP’s are Integrated in standard way. There are cases where you have the option of Integrating it differently. This goes un-noticed or unable to be implemented due to time constraints. One such IP that would be discussed in this paper is DMA . This paper tries to explain idea of Integrating Direct Memory access(DMA) and Interrupt Control Unit(ICU) differently but final implementation requires some changes in IP. There is a possibility that alternate design explained below may be already implemented.

Frequently asked questions about DMA IP

What is Scatter-Gather DMA Controller?

Scatter-Gather DMA Controller is a DMA IP core from Lattice Semiconductor Corp. listed on Semi IP Hub.

How should engineers evaluate this DMA?

Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this DMA IP.

Can this semiconductor IP be compared with similar products?

Yes. Buyers can compare this product with similar semiconductor IP cores or IP families based on category, provider, process options, and structured technical specifications.

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