HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 486

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

HITACHI 478
Notes: 1.
WRH, WRL,
AD15–AD0
WR (Write)
AD15–AD0
RD (Read)
DPH, DPL
HBS, LBS
DPH, DPL
A21–A0
DACK0
DACK1
DACK0
DACK1
(Read)
(Write)
(Write)
(Write)
(Read)
CSn
2.
3.
CK
For t
50% duty) instead of t
For t
t
RDH
RDAC2
ACC2
is measured from A21–A0, CSn, or RD, whichever is negated first.
Figure 19.22 Basic Bus Cycle: Two-State Access
t
CSD1
t
, use t
AD
t
, use t
RDD
cyc
cyc
T
1
t
t
t
DACD1
WSD1
DACD3
(n + 2) – 44 instead of t
cyc
t
(n + 1.65) – 35 (for 35% duty) or t
WDD1
t
WPDD1
(n + 2) – t
t
ACC2
*
RDD
t
2
RDAC2
– t
*
RDS
1
cyc
T
.
2
t
t
WSD2
DACD3
(n + 2) – t
t
RDS
cyc
AD
(n + 1.5) – 35 (for
t
t
t
(or t
WDH
t
WPDH
CSD2
RSD
t
DACD2
CSD1
t
RDH
) – t
*
3
RDS
.