HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 470

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

HITACHI 462
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)
2
3
CSn
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 19.9 Basic Bus Cycle: Two-State Access
t
CSD1
, use t
t
AD
, use t
cyc
cyc
T
1
t
(n + 2) – 30 instead of t
t
t
DACD1
t
DACD3
WSD1
cyc
(n + 1.65) – 20 (for 35% duty) or t
RDD
t
WDD1
t
WPDD1
(n + 2) – t
t
ACC2
*
t
RDD
2
RDAC2
– t
*
1
RDS
cyc
T
2
.
t
t
WSD2
DACD3
(n + 2) – t
t
RDS
cyc
AD
(n + 1.5) – 20 (for
t
t
t
t
WPDH
(or t
CSD2
WDH
RSD
t
DACD2
CSD1
t
RDH
) – t
*
3
RDS
.