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CS82C37A-12 Datasheet(PDF) 1 Page - Intersil Corporation |
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CS82C37A-12 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 23 page 4-192 March 1997 82C37A CMOS High Performance Programmable DMA Controller Features • Compatible with the NMOS 8237A • Four Independent Maskable Channels with Autoinitial- ization Capability • Cascadable to any Number of Channels • High Speed Data Transfers: - Up to 4MBytes/sec with 8MHz Clock - Up to 6.25MBytes/sec with 12.5MHz Clock • Memory-to-Memory Transfers • Static CMOS Design Permits Low Power Operation - ICCSB = 10 µA Maximum - ICCOP = 2mA/MHz Maximum • Fully TTL/CMOS Compatible • Internal Registers may be Read from Software Description The 82C37A is an enhanced version of the industry standard 8237A Direct Memory Access (DMA) controller, fabricated using Intersil’s advanced 2 micron CMOS process. Pin compatible with NMOS designs, the 82C37A offers increased functionality, improved performance, and dramatically reduced power consumption. The fully static design permits gated clock operation for even further reduction of power. The 82C37A controller can improve system performance by allowing external devices to transfer data directly to or from system memory. Memory-to-memory transfer capability is also provided, along with a memory block initialization fea- ture. DMA requests may be generated by either hardware or software, and each channel is independently programmable with a variety of features for flexible operation. The 82C37A is designed to be used with an external address latch, such as the 82C82, to demultiplex the most significant 8-bits of address. The 82C37A can be used with industry standard microprocessors such as 80C286, 80286, 80C86, 80C88, 8086, 8088, 8085, Z80, NSC800, 80186 and others. Multimode programmability allows the user to select from three basic types of DMA services, and reconfiguration under program control is possible even with the clock to the controller stopped. Each channel has a full 64K address and word count range, and may be programmed to autoinitialize these registers following DMA termination (end of process). Ordering Information PART NUMBER PACKAGE TEMPERATURE RANGE PKG. NO. 5MHz 8MHz 12.5MHz CP82C37A-5 CP82C37A CP82C37A-12 40 Ld PDIP 0oC to +70oC E40.6 IP82C37A-5 IP82C37A IP82C37A-12 -40oC to +85oC E40.6 CS82C37A-5 CS82C37A CS82C37A-12 44 Ld PLCC 0oC to +70oC N44.65 IS82C37A-5 IS82C37A IS82C37A-12 -40oC to +85oC N44.65 CD82C37A-5 CD82C37A CD82C37A-12 40 Ld CERDIP 0oC to +70oC F40.6 ID82C37A-5 ID82C37A ID82C37A-12 -40oC to +85oC F40.6 MD82C37A-5/B MD82C37A/B MD82C37A-12/B -55oC to +125oC F40.6 5962-9054301MQA 5962-9054302MQA 5962-9054303MQA SMD# F40.6 MR82C37A-5/B MR82C37A/B MR82C37A-12/B 44 Pad CLCC -55oC to +125oC J44.A 5962-9054301MXA 5962-9054302MXA 5962-9054303MXA SMD# J44.A File Number 2967.1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999 |
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