Minimum Mode Interface • DMA (Direct Memory Access) Interface Signals: – HOLD : External device puts logic level 1 to HOLD input to take control of the bus for DMA request. – HLDA (Hold acknowledge) : Processor responds by putting logic level 1 to HDLA. – In this state; Address and Data lines, SSO, IO/M, DT/R, RD, WR, DEN signals are all put to high-Z state. - Study24x7
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Minimum Mode Interface • DMA (Direct Memory Access) Interface Signals: – HOLD : External device puts logic level 1 to HOLD input to take control of the bus for DMA request. – HLDA (Hold acknowledge) : Processor responds by putting logic level 1 to HDLA. – In this state; A...

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