dp8344b National Semiconductor Corporation, dp8344b Datasheet - Page 129
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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
H-WT-RD
H-WT-WR
H-WT-IWR
PD-WT-X
PD-WT-LCL
PD-WT-WR
PD-WT-IWR
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
Note 2 The maximum value for this parameter is the latest WAIT can be removed without adding an additional T-state The formula assumes a minimum external
wait of one T-state
Symbol
ID
4
4
4
5
6
7
7
WAIT Rising after READ Falling
(Buffered Read and Latched Read) (Note 2)
WAIT Rising after WRITE Falling (Slow Buffered Write
Fast Buffered Write and Latched Write) (Note 2)
WAIT Rising after IWR Falling (Slow Buffered Write
Fast Buffered Write and Latched Write) (Note 2)
WAIT Rising to XACK Rising (Buffered Read Latched
Read Slow Buffered Write and Fast Buffered Write)
WAIT Rising to LCL Falling (Latched Write)
WAIT Rising to WRITE Rising (Latched Write)
WAIT Rising to IWR Rising (Latched Write)
TABLE 5-27 Remote Interface WAIT Timing (Note 1) (Continued)
(a) Buffered Read Latched Read Slow Buffered
FIGURE 5-27 Remote Interface WAIT Timing
(Continued)
Parameter
Write and Fast Buffered Write
(b) Latched Write
129
(n
(n
(n
(n
(n
DW
DW
(n
IW
IW
DW
DW
2T
Formula
a
a
T
T
T
T
a
a
a
a
a
a
T
T
T
)T
1)T
2)T
a
T
1)T
1)T
L
L
L
T
T
T
T
a
a
a
T
a
a
L
L
L
L
TL F 9336 – B6
a
a
L
T
a
a
a
a
a
a
T
a
H
H
T
T
T
T
a
TL F 9336 – B5
H
H
a
H
H
a
a
a
a
Min
b
b
b
0
1
2
4
4
5
5
b
b
b
Max
24
26
28
38
30
34
38
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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