Zilog Z16C30 Bedienungsanleitung PDF herunterladen (Seite 121)

100

101

6-2

Z16C30 USC

USER'S MANUAL

UM97USC0100

ZILOG

6.2 FLYBY VS. FLOWTHROUGH DMA OPERATION (Continued)

DMAC

Memory Device

data

REQ

DMAC

Memory Device

data

REQ

Address

Memory Location

Data Register in Device

/RD

Data

from Memory

to DMAC

from DMAC

to Device

/WR

If that's enough data for now

if the device wants more data

DMA Request

(e.g., /TxREQ)

Figure 6-1. Flowthrough DMA Transfer, Memory to Peripheral Device

UM009402-0201

1 2 ... 116 117 118 119 120 121 122 123 124 125 126 ... 207 208

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