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COM20020D Scheda tecnica(PDF) 63 Page - SMSC Corporation

Il numero della parte COM20020D
Spiegazioni elettronici  ULANC Revision D Universal Local Area Network Controller with 2K x 8 On-Board RAM
PDF  72 Pages
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Produttore elettronici  SMSC [SMSC Corporation]
Homepage  http://www.smsc.com
Logo SMSC - SMSC Corporation

COM20020D Scheda tecnica(HTML) 63 Page - SMSC Corporation

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63
FIGURE 20 – BACKPLANE MODE TRANSMIT OR RECEIVE TIMING
(These signals are to and from the differential driver or the cable)
nPULSE1
t2
t3
RXIN
t10
t11
nPULSE2
t5
t6
(Internal Clk)
t4
Parameter
min
typ
max
units
t2
t3
t4
t5
t6
t7
t8
t10
t11
t12
nPULSE1 Pulse Width
nPULSE1 Period
nPULSE2 Low to nPULSE1 Low
nPULSE2 High Time
nPULSE2 Low Time
nPULSE2 Period
nPULSE2 High to nTXEN High
RXIN Active Pulse Width
RXIN Period
nS
nS
nS
nS
nS
nS
nS
nS
nS
200*
400*
100*
100*
200*
200*
400*
50
50
-25
10
t1
t7
nTXEN
t9
t8
LAST BIT
(400 nS BIT TIME)
t1
nPULSE2 High to nTXEN Low
-25
50
nS
(First Rising Edge on nPULSE2 after Last Bit Time)
t9
nTXEN Low to first nPULSE1 Low**
650
750
nS
t13
t12
-25
RXIN Inactive Pulse Width
20
nS
t13
Beginning Last Bit Time to nTXEN High**
450
nS
Above values are for 2.5 Mbps.
Other Data Rates are shown below.
550
TDR is the Data Rate Period
*t5, t6 = TDR/4
*t2, t7, t10 = TDR/2
*t3, t11 = TDR
**t9 =
x TDR +/- 50 nS
7
4
**t13 =
x TDR +/- 50 nS
5
4



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