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參數(shù)資料
| 型號： | S2080 |
| 廠商： | Applied Micro Circuits Corp. |
| 英文描述： | 34×34 3.2 Gbit/s Differential Crosspoint Switch(高達(dá)3.2 Gbit/s數(shù)據(jù)傳送速率的34×34差分交叉開關(guān)) |
| 中文描述： | 34 × 34 3.2 Gbit / s的微分交叉點(diǎn)開關(guān)（高達(dá)3.2 Gbit / s的數(shù)據(jù)傳送速率的34 × 34差分交叉開關(guān)） |
| 文件頁數(shù)： | 3/28頁 |
| 文件大?。?/td> | 884K |
| 代理商： | S2080 |
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3
S2080
34 X 34 3.2 GBIT/S DIFFERENTIAL CROSSPOINT SWITCH
February 15, 2001 / Revision A
DATA TRANSFER
For each configured connection between a differen-
tial input pair and an enabled output pair, any data
appearing at the input pair will be passed immedi-
ately through to the output pair.
CONFIGURATION
The S2080 can be selectively configured one output
pair at a time, or any number of output pairs simulta-
neously. Configuration data is stored in 34 registers,
one register for each output pair. The data in these
34 registers make up the configuration register file.
As shown in Figure 2, the configuration data is
passed in parallel from all 34 registers to a latch,
which holds the active switch configuration. This two-
stage arrangement allows one or more output pairs to
be configured simultaneously. A Chip Select pin
(CSN) is provided to simplify interfacing this switch to
the system microprocessor. When CSN is inactive,
both the LOADN and CONFIGN signals will be ig-
nored. Therefore, no new addresses or configurations
will occur at the configuration register file or the active
matrix. When CSN is active, the crosspoint will oper-
ate as specified.
The S2080 minimizes the configuration time through
the use of the active configuration latch. While the
switch is operational, and prior to the time at which it
must be reconfigured, a new configuration is loaded
into the configuration register file. Once the configu-
ration register file contains the desired connection
information, the contents of the registers are trans-
ferred in parallel to the active configuration latch by
the CONFIGN strobe.
To connect an output to a given input, the output to
be configured is selected using the OADDR[5:0]
(OADDR5 = MSB) inputs. See Table 1. With the out-
put configuration register selected, the desired input
selection must be provided in the IADDR[5:0]I
(IADDR5 =MSB) inputs. The IADDR[5:0] information
is stored into the selected output configuration regis-
ter by the LOADN strobe. The configuration process
is described by the flow chart in Figure 5.
The active configuration latch can be made transpar-
ent by activating the CONFIGN input. When this is
done, changes strobed into the output pair configu-
ration registers by the LOADN input pair will be
passed immediately to the switch.
The S2080 supports both broadcast and multicast
operations: any of the 34 differential input pairs can
be connected to any or all of the 34 differential out-
put pairs.
OUTPUT SWING ADJUST
The S2080 output swing can be adjusted by connect-
ing one or more of the VADJUSTx pins to the
VCSHIGH pin according to Tables 2 and 3. Note that
as the output swing is increased, the power dissipated
by the part is proportionally increased (see Tables 13
and 14). The output swing range for +3.3 power sup-
ply is from 400 mVpp differential up to 1275 mVpp
differential per Table 2. The output swing range for
+2.7 V power supply is from 350 mVpp differential up
to 1095 mVpp differential per Table 3.
t
u
g
p
t
u
O
n
S
#
1
T
S
U
J
D
A
V
2
T
S
U
J
D
A
V
3
T
S
U
J
D
A
V
x
x
)
D
T
U
p
O
p
V
D
m
(
1
2
3
4
5
6
O
T
O
T
O
T
T
T
O
O
T
T
O
O
T
T
T
T
0
0
5
0
1
7
0
8
6
4
1
2
4
5
7
9
1
1
0
5
Table 2. Output Swing Adjust Pin Settings (+3.3 V)
Note: T = Ties pin(s) VADJUSTx to pin VCSHIGH
O = Open
t
u
g
p
t
u
O
n
S
#
1
T
S
U
J
D
A
V
2
T
S
U
J
D
A
V
3
T
S
U
J
D
A
V
x
x
)
D
T
U
p
O
p
V
D
m
(
1
2
3
4
5
6
O
T
O
T
O
T
T
T
O
O
T
T
O
O
T
T
T
T
0
0
0
0
0
9
5
1
7
2
6
0
3
5
6
8
9
1
5
Table 3. Output Swing Adjust Pin Settings (+2.7 V)
Note: T = Ties pin(s) VADJUSTx to pin VCSHIGH
O = Open
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