VL82C37A Description
The VL82C37A Direct Memory Access (DMA) Controller serves as a peripheral interface circuit for microprocessor systems, and is designed to improve system performance by allowing external devices to directly transfer information from the system memory. Memory-to-memory transfer capabil~y is also provided. The VL82C37A DMA Controller offers many programmable control.
VL82C37A Key Features
- Low-power CMOS version of popular 8237A DMA controller
- Four DMA channels
- Individual enable/disable control of DMA requests
- Directly expandable to any number of channels
- Independent auto-initialize feature for all channels
- High performance 8 MHz version available
- Transfers may be terminated by endof-process input
- Software controlled DMA requests
- Independent polarity control for DREO and DACK signals
- lOR -lOW -MEMR -MEMW