HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 44
HD64570
Manufacturer Part Number
HD64570
Description
Serial Communications Adaptor
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD64570.pdf
(469 pages)
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Rev. 0, 07/98, page 28 of 453
Store data
1. Decode address
2. Write data
3. WAIT inactive
End of cycle
WAIT active
Memory
Figure 1.16 Receive DMA Operation (CPU mode 0)
Access memory
1. Put address on bus (A to A , BHE)
2. AS active
End of transfer
AS and WR inactive
Or start next cycle
Relinquish bus
Data valid
WR active
Get bus
DMAC
0
SCA
When the number of bytes of data in
RX FIFO has risen to the number set in
MSCI RX ready control register (RRC) +
1 or greater, and RX FIFO has not
subsequently become empty
23
End of cycle
If RX FIFO is empty after
this transfer, negate the
DMA request
DMA Request
RXRDY active
Send data
Put data on bus
MSCI
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