Cas Latency = 3) - Hitachi SH7750 Hardware Manual

Sh7750 series superh risc engine
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Tpr
CKIO
t
AD
BANK
Precharge-sel
Address
t
CSD
t
RWD
RD/
t
RASD
t
CASD2
DQMn
D63–D0
(read)
t
WDD
D63–D0
(write)
t
DACD
DACKn
(SA: IO ← memory)
Notes: IO: DACK device
SA: Single address DMA transfer
DA: Dual address DMA transfer
DACK set to active-high
Figure 22.26 Synchronous DRAM Normal Read Bus Cycle: PRE + ACT + READ
Commands, Burst (RCD[1:0] = 01, TPC[2:0] = 001, CAS Latency = 3)
Rev. 6.0, 07/02, page 888 of 986
Tpc
Tr
Trw
Tc1
t
AD
Row
t
AD
Row
Row
t
RWD
t
t
t
RASD
RASD
RASD
t
CASD2
t
DQMD
Tc2
Tc3
Tc4/Td1
H/L
c0
t
CASD2
t
RDS
t
BSD
t
DACD
Td3
Td4
Td2
t
DQMD
t
RDH
d0
d1
d2
d3
t
BSD
t
AD
t
CSD
t
WDD
t
DACD

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