Figure 22.29 Synchronous Dram Auto-Precharge Write Bus Cycle: Burst (Rcd[1:0] = 01, Tpc[2:0] = 001, Trwl[2:0] = 010) - Hitachi SH7750 Hardware Manual

Sh7750 series superh risc engine
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Tr
CKIO
t
AD
BANK
Row
Precharge-sel
Row
Address
Row
t
CSD
RD/
t
RASD
t
CASD2
DQMn
t
WDD
D63–D0
(write)
CKE
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 22.29 Synchronous DRAM Auto-Precharge Write Bus Cycle: Burst
(RCD[1:0] = 01, TPC[2:0] = 001, TRWL[2:0] = 010)
Trw
Tc1
Tc2
t
AD
H/L
c0
t
t
RWD
RWD
t
RASD
t
t
CASD2
CASD2
t
DQMD
t
t
WDD
WDD
d0
d1
t
t
BSD
BSD
Trwl
Tc3
Tc4
t
AD
t
CSD
t
DQMD
d2
d3
t
DACD
Rev. 6.0, 07/02, page 891 of 986
Trwl
Tpc

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