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DP83902AVF Datasheet(PDF) 60 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza DP83902AVF
Descripción Electrónicos  ST-NICTM Serial Network Interface Controller for Twisted Pair
PDF  70 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83902AVF Datasheet(HTML) 60 Page - National Semiconductor (TI)

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150 Switching Characteristics AC Specs DP83902A Note All Timing is Preliminary (Continued)
Wait State Insertion
TLF11157 – 41
Symbol
Parameter
Min
Max
Units
ews
External Wait Setup to T3 0Clock (Note 1)
10
ns
ewr
External Wait Release Time (Note 1)
15
ns
Note 1
The addition of wait states affects the count of deserialized bytes and is limited to a number of bus clock cycles depending on the bus clock and network
rates The allowable wait states are found in the table below (Assumes 10 Mbitsec data rate)
BSCK (MHz)
Max
of Wait States
Byte Transfer
Word Transfer
80
1
10
0
1
12
1
2
14
1
2
16
1
3
18
2
3
20
2
4
Table assumes 10 MHz network clock
The number of allowable wait states in byte mode can be
calculated using
W(byte mode) e
 8tnw
45 tbsck
b
1
J
W
e
Number of Wait States
tnw
e
Network Clock Period
tbsck
e
BSCK Period
The number of allowable wait states in word mode can be
calculated using
W(word mode) e
 5tnw
2 tbsck
b
1
J
60



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