Hitachi SH7750 series Hardware Manual page 508

Four requests can be queued
CLK
4th
2nd 3rd
1st
DBREQ
BAVL
TR
A25–A0
D63–D0
RAS,
CAS, WE
TDACK
ID1, ID0
Figure 14.49 Single Address Mode/Burst Mode/External Device → → → → External Bus Data
5th
RA CA
D0
BA
WT
Transfer/Direct Data Transfer Request to Channel 2
Handshaking is necessary
to send additional requests
CA
D2 D3
D0 D1
D1
WT
CA
D2
D3 D0 D2
D1
WT
Must be ignored
(no request transmitted)
Rev. 4.0, 04/00, page 497 of 850
D3
NOP