Hitachi SH7751 Hardware Manual page 585

Four requests can be queued
1st 2nd 3rd 4th
A25–A0
D31–D0
RAS, CAS,
WE
ID1, ID0
Figure 14.52 Single Address Mode/Burst Mode/External Device
Transfer (Active Bank Address)/Direct Data Transfer Request to Channel 2
Rev. 3.0, 04/02, page 546 of 1064
Handshaking is necessary
to send additional requests
5th
CA CA
D2
D0 D1 D3 D0
WT
WT
CA
D1 D2 D3 D2
D0 D1
WT
Must be ignored
(no request transmitted)
 
External Bus Data
CA
D3
WT