參數(shù)資料
型號: S2060
廠商: Electronic Theatre Controls, Inc.
英文描述: GIGABIT ETHERNET TRANSCEIVER
中文描述: 千兆以太網(wǎng)收發(fā)器
文件頁數(shù): 18/22頁
文件大小: 693K
代理商: S2060
18
S2060
GIGABIT ETHERNET TRANSCEIVER
March 7, 2001 / Revision H
OTHER OPERATING MODES
Loopback Mode
The S2060 supports internal loopback mode in
which the serial data from the transmitter replaces
external serial data. The loopback function is en-
abled when the loopback enable signal, EWRAP, is
set ACTIVE.
The loopback mode provides the ability to perform
system diagnostics and to perform off-line testing of
the interface to guarantee the integrity of the serial
channel before enabling the transmission medium.
Figure 13 shows the basic loopback operation.
output
disabled
CRU
CSU
Figure 13. Loopback Operation
Figure 12. Receiver Timing Half Rate Mode (RATEN Inactive)
Table 9. S2060 Receiver Timing
RBC1
SERIAL DATA IN
RX[9-0]
T
3
T
4
COMMA
T
3
T
4
s
r
e
m
a
r
a
P
n
o
p
c
s
e
D
n
M
x
a
M
s
U
s
n
o
n
o
C
T
3
)
C
B
R
(
1
C
B
R
e
b
d
v
a
D
0
-
s
n
.
e
N
e
e
S
T
4
)
C
B
R
(
1
C
B
R
r
d
v
a
D
0
-
s
n
T
R
C
R
T
,
F
C
R
e
m
i
l
F
d
n
a
e
s
R
0
C
B
R
,
C
B
R
-
4
s
n
.
V
0
+
o
V
8
d
e
s
a
e
M
w
e
k
S
w
e
k
S
0
C
B
R
o
1
C
B
R
5
5
s
n
.
g
d
e
g
n
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e
g
d
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g
n
R
T
R
D
T
,
F
D
e
m
i
l
F
d
n
a
e
s
R
t
p
O
a
D
-
4
s
n
.
V
0
+
o
V
8
d
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a
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M
T
K
C
O
L
)
u
)
G
5
2
e
m
i
k
c
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n
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q
c
a
p
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S
-
5
s
μ
T
e
K
c
C
a
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L
)
q
)
G
5
2
e
m
i
k
c
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L
n
o
q
c
A
a
D
-
0
0
1
s
n
e
e
s
e
y
e
a
d
t
p
.
1
n
%
e
0
9
g
-
0
5
2
s
n
.
y
e
a
d
t
p
n
%
4
2
e
y
C
y
D
)
C
B
R
(
1
C
B
R
0
4
0
6
%
T
J
e
c
n
a
T
r
t
p
n
T
9
9
5
-
s
p
.
3
0
8
E
E
E
I
n
d
e
e
p
s
s
A
T
J
D
e
c
n
a
T
r
t
p
n
c
m
r
D
0
7
3
-
s
p
.
3
0
8
E
E
E
I
n
d
e
e
p
s
s
A
1. All AC measurements are made from the reference voltage level of the clock (+1.4 V) to the valid input or output data
levels (+.8 V or +2.0 V).
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