HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 493

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

Notes: 1.
WRH, WRL,
WRH, WRL,
AD15–AD0
AD15–AD0
Figure 19.28 DRAM Bus Cycle: (Long Pitch, High-Speed Page Mode + Wait State)
DPH, DPL
DPH, DPL
RD(Read)
RD(Write)
A21–A0
DACK0
DACK1
DACK0
DACK1
(Read)
(Read)
(Read)
(Write)
(Write)
(Write)
(Write)
WAIT
RAS
CAS
2.
3.
CK
For t
For t
For t
CAC2
ACC2
RAC2
T
, use t
, use t
, use t
p
cyc
cyc
cyc
(n + 1) – 35 instead of t
(n + 2) – 44 instead of t
(n + 2.5) – 35 instead of t
T
r
Row
T
t
c1
RDD
t
WTS
cyc
cyc
t
Column
WTH
cyc
t
t
t
T
(n + 1) – t
(n + 2) – t
CAC2
ACC2
RAC2
w
(n + 2.5) – t
t
WTS
*
*
*
1
2
3
t
WTH
CASD2
AD
– t
T
RASD1
c2
RDS
– t
RDS
HITACHI 485
.
– t
.
RDS
t
RDS
.