The 82C37A is a CMOS high-performance programmable DMA controller fabricated using Intersil's advanced 2 micron CMOS process. It offers increased functionality, improved performance, and dramatically reduced power consumption. The controller improves system performance by allowing external devices to transfer data directly to or from system memory.
The 82C37A is a CMOS high‑performance programmable DMA controller compatible with the NMOS 8237A. It offers four independent maskable channels, autoinitialization, memory‑to‑memory transfers, and low‑power operation. The document details its functional description, pinout diagrams, and timing characteristics.
Additional sections cover pin descriptions, internal registers, state machine operation, cascade mode for system expansion, and ordering information including temperature ranges and package options.
| Transfer Rate (12.5 MHz) | 6.25 MByte/sec |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Package Types | PDIP, PLCC, CLCC |
| Maximum Current per MHz | 2 mA/MHz |
It is a direct memory access (DMA) controller designed to improve data transfer rates by moving data directly between I/O devices and memory, and it also supports memory‑to‑memory transfers.
Four independent maskable channels with autoinitialization capability.
Pin 31 supplies the +5 V power (VCC).