Description

The 82C237 is a modified version of the 82C37A. The 82C237 is fully software and pin for pin compatible with the 82C37A but provides an additional mode for 16-bit DMA transfers, as well as enhanced speed. Each channel may be individually programmed for 8-bit or 16-bit data transfers.

Features

? Fully Compatible with Intersil 82C37A

??? - 82C237 May be Used in 8MHz and 12.5MHz 82C37A Sockets

? Optimized for 10MHz and 12.5MHz 80C286 Systems

? Special Mode Permits 16-Bit, Zero Wait State DMA Transfers

? High Speed Data Transfers:

??? - Up to 6.25MBytes/sec with 12.5MHz Clock in Normal Mode

??? - Up to 12.5MBytes/sec with 12.5MHz Clock in 16-Bit Mode

? Compatible with the NMOS 8237A

? Four Independent Maskable Channels with Autoinitialization Capability

? Cascadable to any Number of Channels

? 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