dp8344b National Semiconductor Corporation, dp8344b Datasheet - Page 100
dp8344b
Manufacturer Part Number
dp8344b
Description
Biphase Communications Processor?bcp
Manufacturer
National Semiconductor Corporation
Datasheet
1.DP8344B.pdf
(184 pages)
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t
t
t
t
t
t
t
t
t
t
W-ALE
PD-AAD-ALE
PD-ALE-AD
PD-DATA-WR
PD-AAD-WR
PD-WR-DATA
PD-WR-DATAz
W-WR
PD-ALE-AAD
PD-WR-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
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
AD (Data) Valid to WRITE Rising
A AD (Data Address) Valid to WRITE Falling
WRITE Falling to AD (Data) Valid
WRITE Rising to AD (Data) Invalid
WRITE Low
ALE Rising to A AD (Data Address) Valid
WRITE Rising to A Invalid
TABLE 5-4 Data Memory Write Timing (Note 1)
TABLE 5-4 Data Memory Write Timing (Note 1)
Parameter
FIGURE 5-4 Data Memory Write Timing
(Continued)
100
(MAX(n
(MAX(n
(n
DW
DW
RW
(n
Formula
1 5T
RW
T
T
T
n
n
T
a
H
H
L
IW
IW
a
a
a
)T
a
1)T
a
b
b
a
1)
1)
a
a
a
1)T
1)T
a
a
b
b
b
b
b
Min
b
b
b
TL F 9336 – 53
10
22
20
28
10
2
4
2
Max
12
19
10
24
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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