Four requests can be queued
CLK
4th
2nd
1st
3rd
A25–A0
D63–D0
RAS,
CAS, WE
ID1, ID0
Figure 14.49 Single Address Mode/Burst Mode/External Bus → → → → External Device Data
Rev. 6.0, 07/02, page 568 of 986
RA
CA
BA
RD
Transfer/Direct Data Transfer Request to Channel 2
Handshaking is necessary
to send additional requests
5th
CA
D2
D0
D1
D3
D0
RD
Must be ignored
(no request transmitted)
No more requests
CA
D1 D2
D0
D1
D3
RD
NOP
D2