Product Information

DMA-MC-E2-N3

DMA-MC-E2-N3 electronic component of Lattice

Datasheet
Development Software DMA Controller

Manufacturer: Lattice
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges



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DMA-MC-E2-N3
Lattice

1 : USD 2759.3557
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Obsolete
     
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TM ispLever CORECORE Multi-Channel DMA Controller Users Guide February 2006 ipug11 04.0 Lattice Semiconductor Multi-Channel DMA Controller Users Guide Introduction The Multi-Channel Direct Memory Access (MCDMA) Controller is designed to improve microprocessor system per- formance by allowing external devices to transfer information directly from the system memory and vice versa. Memory-to-memory transfer capability is also supported. The MCDMA Controller core supports two modes of operation: 8237 and non-8237 modes. When the 8237 mode is selected, the core is functionally compatible with the Intel 8237A DMA Controller device with a few variations. These variations are listed in the Compatibility Differences with the 8237 Intel Device section of this document. The 8237 and non-8237 modes are detailed later in this document to provide a clearer description of each mode. Differences Between 8237 Mode and Non-8237 Mode MCDMA While the 8237 and non-8237 modes share some commonality, they also have differences. Table 1 shows the dif- ferences between the two modes. Table 1. Feature Differences Between the 8237 and Non-8237 Modes Feature 8237 Mode Non-8237 Mode Multiple independent channels 4 1-16 Parameterized address bus Fixed 16 bits 16, 24 or 32 bits Parameterized data bus Fixed 8 bits 8, 16, 32 or 64 bits Parameterized word count register Fixed 16 bits 8, 16, 24 or 32 bits Auto-initialization Supported Supported Compressed timing Supported Not supported Cascade mode Not supported Not supported DMA transfer conguration for each channel Not supported Supported Priority request mode Rotating/xed priority mode Fixed priority mode DMA request active state High/low High Software reset Supported Not supported Compatibility Differences with the 8237 Intel Device When the MCDMA core is congured for the 8237 mode, it differs from the Intel 8237A core in the following ways: The bi-directional ports are split into separate input and output ports. MCDMA does not support the cascade mode of operation. The latch that holds the upper byte of the address is internal and the address strobe signal ADSTB is not gener- ated. The slaves write cycle in the MCDMA core is synchronous. Features Selectable 8237 mode Congurable up to 16 independent DMA channels for non-8237 mode Congurable data width of 8-, 16-, 32- or 64-bits for non-8237 mode Congurable address width of 16-, 24- or 32-bits for non-8237 mode Congurable Word Count register width for non-8237 mode Independent auto-initialization of all channels Memory-to-memory transfers on single, block, and demand transfer mode Memory block initialization 2

Tariff Desc

8543.70.00 Other machines and apparatus Free
13 Signal processors (graphic equalisers, crossovers etc.) 91 Other Free

9027.10.00 Instruments and apparatus for physical or chemical analysis (eg, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes Free

9031.80.00 MEASURING OR CHECKING INSTRUMENTS, APPLIANCES AND MACHINES, NOT SPECIFIED OR INCLUDED ELSEWHERE IN THIS CHAPTER; PROFILE PROJECTORS Other instruments, appliances and machines Free

9030.31.00 Oscilloscopes, spectrum analysers and other instruments and apparatus for measuring or checking electrical quantities, excluding meters of 9028; instruments and apparatus for measuring or detecting alpha, beta, gamma, x-ray, cosmic or other ionising radiations.
Other instruments and apparatus, for measuring or checking voltage, current, resistance or power Multimeters without a recording device Free

8473.30.00 Parts and accessories of the machines of 8471 AUTOMATIC DATA PROCESSING MACHINES AND UNITS THEREOF; MAGNETIC OR OPTICAL READERS, MACHINES FOR TRANSCRIBING DATA ONTO DATA MEDIA IN CODED FORM AND MACHINES FOR PROCESSING SUCH DATA, NOT ELSEWHERE SPECIFIED OR INCLUDED:
.Other 71 No Weighing less than 1kg Free

8537 BOARDS, PANELS, CONSOLES, DESKS, CABINETS AND OTHER BASES, EQUIPPED WITH TWO OR MORE APPARATUS OF 8535 OR 8536, FOR ELECTRIC CONTROL OR THE DISTRIBUTION OF ELECTRICITY, INCLUDING THOSE INCORPORATING INSTRUMENTS OR APPARATUS OF CHAPTER 90, AND NUMERICAL CONTROL APPARATUS, OTHER THAN SWITCHING APPARATUS OF 8517:
8538 PARTS SUITABLE FOR USE SOLELY OR PRINCIPALLY WITH THE APPARATUS OF 8535, 8536 OR 8537:
8538.10.10 22 For programmable controllers Free
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Lattice Semiconductor
Lattice Semiconductor Corporation
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