Figure 22.38 Dram Bus Cycle (Edo Mode, Rcd[1:0] = 00, Anw[2:0] = 000, Tpc[2:0] = 001) - Hitachi SH7750 Hardware Manual

Sh7750 series superh risc engine
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CKIO
A25–A0
RD/
D63–D0
(read)
D63–D0
(write)
DACKn
(SA: IO ← memory)
Notes: IO: DACK device
SA: Single address DMA transfer
DA: Dual address DMA transfer
DACK set to active-high
(EDO Mode, RCD[1:0] = 00, AnW[2:0] = 000, TPC[2:0] = 001)
T1r
Tr2
Tc1
t
t
AD
AD
Row
t
CSD
t
RWD
t
t
RASD
RASD
t
t
CASD1
CASD1
t
WDD
t
BSD
t
t
DACD
DACD
Figure 22.38 DRAM Bus Cycle
Tce
Tpc
Tc2
t
AD
Column
t
CSD
t
RWD
t
RASD
t
CASD1
t
t
RDS
RDH
t
BSD
Rev. 6.0, 07/02, page 901 of 986

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