Figure 22.27 Synchronous Dram Normal Read Bus Cycle: Read Command, Burst (Cas Latency = 3) - Hitachi SH7750 Hardware Manual

Sh7750 series superh risc engine
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CKIO
BANK
Precharge-sel
Address
RD/
DQMn
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
Figure 22.27 Synchronous DRAM Normal Read Bus Cycle: READ Command, Burst
Tc1
Tc2
Tc3
t
AD
Row
H/L
c0
t
CSD
t
RWD
t
RASD
t
t
CASD2
CASD2
t
DQMD
t
WDD
t
DACD
(CAS Latency = 3)
Td3
Tc4/Td1
Td2
t
DQMD
t
t
RDS
RDH
d0
d1
t
t
BSD
BSD
t
DACD
Rev. 6.0, 07/02, page 889 of 986
Td4
t
AD
t
CSD
t
RWD
t
RASD
d2
d3
t
WDD
t
DACD

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