Zilog Z16C30 Uživatelský manuál stáhnout pdf (Strana 122)

6-3

Z16C30 USC

®

USER'S MANUALZILOG

UM97USC0100

DMAC

Memory Device

data

REQ

DMAC

Memory Device

data

REQ

Address

Data Register in Device

Memory Location

/RD

Data

from Device

to DMAC

from DMAC

to Memory

/WR

If the device doesn't have (much) more data

if the device wants to provide more data

DMA Request

(e.g., /RxREQ)

Figure 6-2. Flowthrough DMA Transfer, Peripheral Device to Memory

UM009402-0201

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