¡ Semiconductor
MSM6242B
t
C1S
CS
1
A
0
~ A
3
CS
0
ALE
WR
D
0
~ D
3
(INPUT)
V
IH2
–
V
IH1
–
V
IL1
–
V
IH1
–
V
IL1
–
V
IH1
–
V
IL1
–
V
IH1
–
V
IL1
–
,,
,
,,
,,
t
AS
,,
,
,,
t
AH
,,
,
,,
,,
,,
,,
t
C1H
V
IH1
= 2.2V
V
IL1
= 0.8V
V
IH2
= 4/5V
DD
V
IL2
= 1/5V
DD
,,
,,
,,
,,
,,
,,
,,
,
t
AW
t
ALW
,,
,
t
WW
t
DS
,,
,
t
WAL
t
,,
,,
RCV
,
t
DH
,,,,,
,,
,
,,
,
,,
,,
,,
,,
,
Figure 5. Write Cycle — (With Use of ALE)
(3) READ mode (ALE = V
DD
)
(V
DD
= 5V ± 10%, Ta = -40 to +85°C)
Parameter
CS
1
Set up Time
CS
1
Hold Time
Address Stable before
READ
Address Stable after
READ
RD
to Data
Data Hold
RD
/
WR
Recovery Time
Symbol
t
C1S
t
C1H
t
AR
t
RA
t
RD
t
DR
t
RCV
Condition
—
—
—
—
C
L
= 150pF
—
—
—
0
60
Min.
1000
1000
20
0
Max.
—
—
—
ns
—
120
—
—
Unit
CS
1
A
0
~ A
3
CS
0
RD
D
0
~ D
3
(OUTPUT)
V
IH2
–
V
IH1
–
V
IL1
–
V
IH1
–
V
IL1
–
V
OH
–
V
OL
–
t
C1S
,,
,
,,
,,
,
t
AR
,,
,,
,,
,,
,,
,
t
RA
,,
,
,,
t
C1H
,,
t
RCV
,,,
t
RD
,,
,,
,,
,,
,,
,,
,,
,,
t
DR
,,
,,
,
"Z"
,,
V
IH1
= 2.2V
V
IL1
= 0.8V
V
IH2
= 4/5V
DD
V
IL2
= 1/5V
DD
V
OH
= 2.2V
V
OL
= 0.8V
Figure 6. Read Cycle — (ALE = V
DD
)
29
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