HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 474

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

Note: For details of the silent cycle, see section 8.5.5, Burst Operation.
HITACHI 466
WRH, WRL ,
AD15–AD0
WR (Write)
RD (Write)
Figure 19.12 (b) DRAM Bus Cycle (Short-Pitch, High-Speed Page Mode: Write)
DPH, DPL
DPH, DPL
A21–A0
DACK0
DACK1
(Write)
(Write)
(Write)
RAS
CAS
CK
T
p
t
RASD1
t
AD
T
r
Row address
t
WPDD2
t
DACD4
t
t
WSD3
WDD2
t
AD
Column address
T
c
t
t
ASC
DACD5
t
t
WPDH
WDH
t
WSD4
Silent
cycle
T
Column address
c
t
DACD5
t
RASD2