HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 706

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

ø
A
AS
CS (RAS
HWR (UCAS),
LWR (LCAS)
RD (WE)
(read)
RD (WE)
(write)
RFSH
D
(read)
D
(write)
9
15
15
to A
3
to D
to D
1
0
0
)
Figure 21-13 DRAM Bus Timing (Read/Write): Three-State Access
t
AD
t
AS1
T
1
t
RAH
t
t
RAD1
ASD
t
AD
t
WDS3
— 2CAS Mode —
t
RAC
t
AS1
T
t
2
AA
t
ASD
698
t
CAC
t
t
RDS
CAS
T
3
t
RAD3
t
t
SD
SD
t
WDH
t
RDH
t
t
CRP
RP