DA70131-1/3E
I-39
7-4-3. I/F mode 4 (IF1=H, IF0=H) (8-bit Z80 etc.)
- Read cycle
- Write cycle
Note 1: Only when reading memory area (address 078h to 1FFh),
_____
WRQ
= LOW will be output by
___
RD
= LOW.
Note 2: When CKSL = LOW or CKSL = HIGH, the
_____
WRQ
signal LOW level will be held for 24 x T
CLK
.
Note 3: When CKSL = LOW or CKSL = HIGH, the data output delay time will be 4T
CLK
+ 24.
Note 4: When reading memory address (addresses 078h to 1FFh).
Note 5: When reading non memory addresses (addresses 078h to 1FFh).
Note 6: The time that the
_____
WRQ
signal is output will be the interval after
_____
WRQ
goes HIGH until
____
WR
goes
HIGH.
Item
Symbol
Condition
Min.
Max.
Unit
Address setup time for
___
RD
,
____
WR
↓
T
ARW
18
ns
Address hold time for
___
RD
,
____
WR
↑
T
RWA
0
ns
____
CS
setup time for
___
RD
,
____
WR
↓
T
CSRW
8
ns
____
CS
hold time for
___
RD
,
____
WR
↑
T
RWCS
0
ns
_____
WRQ
=ON delay time for
____
CS
↓
T
CSWT
C
L
= 40pF
11
ns
_____
WRQ
=ON delay time for
___
RD
↓
T
RDWT
C
L
= 40pF Note 1
17
ns
_____
WRQ
signal LOW time
T
WAIT
Note 2
12T
CLK
ns
Data output delay time for
___
RD
↓
T
RDLD
C
L
= 40pF Note 3, 4
2T
CLK
+24
ns
C
L
= 40pF Note 5
28
ns
Data output delay time for
_____
WRQ
↑
T
WTHD
C
L
= 40pF Note 4
0
ns
C
L
= 40pF Note 5
10
ns
Data float delay time for
___
RD
↑
T
RDHD
C
L
= 40pF
28
ns
____
WR
signal width
T
WR
Note 6
14
ns
Data setup time for
____
WR
↑
T
DWR
22
ns
Data hold time for
____
WR
↑
T
WRD
0
ns
T
RDLD
T
WTHD
A(8:0)
T
ARW
T
CSRW
T
CSWT
D(7:0)
T
WAIT
T
RWA
T
RWCS
T
RDWT
T
RDHD
___
CS
___
RD
A(8:0)
D(7:0)
T
ARW
T
CSRW
T
CSWT
T
WAIT
T
RWA
T
RWCS
T
WR
T
DWR
T
WRD
_____
WRQ
___
CS
___
WR
_____
WRQ
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