dp8344b National Semiconductor Corporation, dp8344b Datasheet - Page 99

• Manufacturer Part Number: dp8344b
• Description: Biphase Communications Processor?bcp
• Manufacturer: National Semiconductor Corporation

t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
W-ALE
PD-AAD-ALE
PD-ALE-AD
H-RD-DATA
AZ-RD-AD
AZ-AD-RD
SU-RD-DATA
SU-RD-DATA
ZA-RD-AD
PD-AAD-RD
PD-AAD-RD
W-RD
W-RD
ACC-D
ACC-D
SU-AD-DATA
SU-AD-DATA
PD-ALE-AAD
PD-RD-A
5 0 Device Specifications
Note 1 All parameters are individually tested and guaranteed Interpreting this data by numerically adding two or more parameters to create a new timing
specification may lead to invalid results
Symbol
ID
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
ALE High
A AD (Data Address) Valid to ALE Falling
ALE Falling to AD (Data Address) Invalid
Data Valid after READ Rising
READ Falling to AD Disabled ( 4TR
AD Disabled before READ Falling ( 4TR
READ Falling to AD (Data) Setup ( 4TR
READ Falling to AD (Data) Setup ( 4TR
READ Rising to AD Enabled
A AD (Data Address) Valid before READ Falling
( 4TR
A AD (Data Address) Valid before READ Falling
( 4TR
READ Low ( 4TR
READ Low ( 4TR
Data Memory Read Time ( 4TR )
Data Memory Read Time ( 4TR )
AD Disabled to AD (Data) Setup ( 4TR
AD Disabled to AD (Data) Setup ( 4TR
ALE Rising to A AD (Data Address) Valid
READ Rising to A Invalid
e
e
0)
1)
e
e
Parameter
TABLE 5-3 Data Memory Read Timing (Note 1)
0)
1)
FIGURE 5-3 Data Memory Read Timing
(Continued)
(a) Read Timing with ( 4TR
(b) Read Timing with ( 4TR
e
e
0)
1)
e
0)
e
e
e
e
e
0)
1)
99
0)
1)
1)
(MAX(n
(MAX(n
(MAX(n
(MAX(n
(MAX(n
(MAX(n
(MAX(n
(MAX(n
e
e
DW
DW
DW
DW
0)
1)
DW
DW
b
b
b
(n
n
DW
DW
IW
1 n
1 n
n
1 n
(n
RW
b
Formula
T
IW
b
a
RW
T
T
2T
T
T
n
n
1 n
T
IW
IW
IW
a
H
H
H
L
IW
b
IW
1)
T
a
a
a
a
a
)T
a
b
b
b
IW
1)T
L
1)
b
b
a
a
a
1)
1)
1)
b
a
1)
1)
1)T
a
a
a
a
1)
2)T
a
a
a
1)T
1)T
3)T
a
1)T
1)T
a
2)T
a
a
a
T
a
a
L
T
T
T
a
a
TL F 9336 – 52
L
L
L
a
a
a
TL F 9336 – H7
b
b
b
b
b
b
b
b
b
Min
b
b
0
0
10
22
20
27
27
10
10
33
33
2
2
b
b
b
b
Max
12
20
10
10
24
22
21
40
40
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns