691
CKIO
A12 or A10
RD/
WR
CSn
RAS
CAS
BS
DQMxx
CKE
(High)
A25 to A16
A15 to A0
Tr
Trw
Trw
Tc1
Tcw
Td1
(Tpc)
(Tpc)
,,,
,,,
D31 to D0
Row address
Row address
Read A
command
Row address
Column address
tAD
tAD
tAD
tAD
tCSD3
tRWD
tDQMD
tRDH2
tBSD
tBSD
tRDS2
tCSD3
tRWD
tRASD2
tDQMD
tRASD2
tCASD2
tCASD2
tAD
tAD
tAD
tAD
DACKn
tDAKD1
tDAKD1
Figure 23.23 Synchronous DRAM Read Bus Cycle (RCD
=
2, CAS Latency
=
2, TPC
=
1)
Содержание SH7709S
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Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
Страница 323: ...304 Tp TRr TRrw TRrw CKIO CKE CSn RAS3U RAS3L CASU CASL RD WR Figure 10 28 Synchronous DRAM Auto Refresh Timing ...
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