(China (Mainland))
Product Summary
The AM9517ADCB is a Multimode Direct Memory Access (DMA) Controller is a peripheral interface circuit for microprocessor systems. The AM9517ADCB is designed to improve system performance by allowing external devices to directly transfer information to or from the system memory. Memory-tomemory transfer capability is also provided. The AM9517ADCB offers a wide variety of programmable control features to enhance data throughput and system optimization and to allow dynamic reconfiguration under program control.
Parametrics
AM9517ADCB absolute maximum ratings: (1)Storage temperature: - 65 to + 150℃; (2)Vee with Respect to vss: -0.5 to + 7.0 V; (3)All Signal Voltages with Respect to vss: -0.5 V to +7.0 V; (4)Power Dissipation (Package Limitation): 1.5 W.
Features
AM9517ADCB features: (1)Four independent DMA channels, each with separate registers for Mode Control, Current Address, Base Address, Current Word Count and Base Word Count; (2)Transfer modes: Block, Demand, Single Word, Cascade; (3)Independent Autoinitialization of all channels; (4)Memory-to-memory transfers; (5)Memory block initialization; (6)Address increment or decrement; (7)Master system disable; (8)Enable/disable control of individual DMA requests; (9)Directly expandable to any number of channels; (10)End of Process input for terminating transfers; (11)Software DMA requests; (12)Independent polarity control for DREQ and DACK signals; (13)Compressed timing option speeds transfers - up to 205M bytes/second; (14)+ 5 volt power supply; (15)N-channel silicon gate MOS technology; (16)40-pin Hermetic DIP package, 44-pin PLCC package; (17)9517A-55 MHz version for higher speed CPU compatibility.
Diagrams
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