The MA31753 Direct Memory Access Controller (DMAC) is a peripheral interface circuit design primarily for use with the MA31750 microprocessor. Each DMAC provides up to four independant, prioritised channels each of which can perform DMA transfers between memory and/or I/O devices using the MA31750 bus. Each channel has its own programmable internal priority and can be masked under program control

FEATURES

■ Radiation Hard CMOS SOS Technology

■ Four Independant DMA Channels

■ MIL-STD-1750A or B Operation in an MA31750 System

■ Capable of Processor Independant Table Driven Operation

■ Memory to Memory, I/O to Memory, Memory to I/O and I/O to I/O Transfers Supported

■ Masking of Individual Channel DMA Requests

■ Simple MA31750 Bus Interface

■ Single Word, Double Word or Multi-Word Transfers for each of the DMA Channels

■ Cascade Interface Allows for Channel Expansion

■ Programmable Channel Priority

■ Parity Checking Available