CKIO
A25
RD/
D63
(read)
D63
(write)
DACKn
(SA: IO ← memory)
DACKn
(SA: IO → memory)
DACKn
(DA)
Notes: IO: DACK device
SA: Single address DMA transfer
DA: Dual address DMA transfer
DACK set to active-high
* SH7750R only
Figure 22.18 SRAM Bus Cycle: Basic Bus Cycle (No Wait, Address Setup/Hold Time
Rev. 6.0, 07/02, page 880 of 986
TS1
t
AD
–
A0
t
CSD
t
RWD
t
RSD
–
D0
t
WED1
t
WDD
–
D0
t
BSD
t
DACD
t
DACD
Insertion, AnS = 1, AnH = 1)
T1
T2
TH1
t
RSD
*
t
t
RDS
t
t
WEDF
WEDF
t
WDD
t
BSD
t
DACD
t
DACD
t
DACDF
t
AD
t
CSD
t
RWD
t
RSD
RDH
t
WDD
t
DACDF
t
DACD