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Description

The 82C37A is an enhanced version of the industry standard 8237A Direct Memory Access (DMA) controller, fabricated using Harris’ 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.

Features

? Compatible with the NMOS 8237A

? Four Independent Maskable Channels with Autoinitialization 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 = 10μA Maximum

- ICCOP = 2mA/MHz Maximum

? Fully TTL/CMOS Compatible

? Internal Registers may be Read from Software