HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 490
HD6417021
Manufacturer Part Number
HD6417021
Description
SuperH RISC engine
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6417021.pdf
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Note: For details of the silent cycle, see section 8.5.5, Burst Operation.
HITACHI 482
WRH, WRL ,
AD15–AD0
WR (Write)
RD (Write)
Figure 19.25 (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
Row address
r
t
WPDD2
t
DACD4
t
t
WSD3
WDD2
t
AD
T
Column address
c
t
t
ASC
DACD5
t
t
WPDH
WDH
t
WSD4
Silent
cycle
T
Column address
c
t
DACD5
t
RASD2
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