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764
CK
A21–A0
Tp
Tpw
Tr
Trw
Tc1
Tcw1
Tcw2
Tc2
t
AD
t
AD
t
ASR
t
RASD1
t
RAH
t
RP
t
CASD1
t
CAC
t
AA
t
RAC
t
RDS
t
RDH
t
CASD2
t
CASD1
t
RWD2
t
RWD1
t
DH
t
DS
t
WDH
t
DACKD1
t
DACKD1
t
WDD
t
RSD1
t
RSD2
t
WSD1
t
WSD2
t
RASD2
t
CASD2
RAS
CASxx
RDWR
D31–D0
CASxx
RDWR
D31–D0
DACKn
RD
WRxx
(During read)
(During read)
(During read)
(During read)
(During write)
(During write)
(During write)
(During write)
Row address
Column address
Note: t
RDH
is specified from fastest negate timing of A21–A0,
RAS
, and
CAS
.
Figure 25.13 DRAM Cycle (Normal Mode, 2 Waits, TPC
=
1, RCD
=
1)
CK
A21–A0
Tp
Tpw
Tr
Trw
Tc1
Tcw1
Tcw2
Tcw3
Tc2
t
AD
t
AD
t
RAH
t
ASR
t
RP
t
CASD1
t
CAC
t
AA
t
CASD1
t
RDS
t
CASD2
tRWD2
t
RWD1
t
DS
t
DH
t
WDH
t
DACKD1
t
RSD1
t
WSD1
t
WSD2
t
RSD2
t
DACKD1
t
RASD2
t
CASD2
t
WDD
RAS
CASxx
RDWR
D31–D0
CASxx
RDWR
D31–D0
DACKn
RD
WRxx
(During read)
(During read)
(During read)
(During read)
(During write)
(During write)
(During write)
(During write)
Row address
Column address
t
RASD1
t
RDH
t
RAC
Note: t
RDH
is specified from fastest negate timing of A21–A0,
RAS
, and
CAS
.
Figure 25.14 DRAM Cycle (Normal Mode, 3 Waits, TPC
=
1, RCD
=
1)
Содержание SH7041 Series
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Страница 923: ...SH7040 SH7041 SH7042 SH7043 SH7044 SH7045 Group Hardware Manual REJ09B0044 0600O ...