Zilog Z16C30 - Manual (Page 122)

6-3
Z16C30 USC ®
U SER ' S M ANUAL Z
ILOG
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