参数资料
型号: WJLXT907ALCA4
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: ROHS COMPLIANT, LQFP-64
文件页数: 15/48页
文件大小: 621K
代理商: WJLXT907ALCA4
Intel
LXT901A/907A Universal 3.3 V Ethernet Transceiver
22
Datasheet
Document Number: 249098
Revision Number: 003
Revision Date: 27-Nov-2005
3.4.2
Full-Duplex Support
Figure 10 shows the LXT907A Transceiver with a Texas Instruments 380C24 CommProcessor.
The 380C24 is compatible with Mode 4 (MD0 and MD1 both High). When used with the 380C24,
or other full-duplex capable controller, the LXT907A Transceiver supports full-duplex Ethernet,
effectively doubling the available bandwidth of the network. In this application, the SQE function
is enabled (DSQE tied Low), and the AUI port is not used.
Figure 10. Full-Duplex Operation
LXT
907
A
CLKI
TXD
TPIN
50
Ω
50
Ω
TPIP
1 : 1
116
14
6
5
4
3
2
1
11
0.1
μF
9
RJ45
3
6
8
CIN
CIP
DON
DOP
DIN
DIP
RBIAS
GND2
GND1
TEN
3
12.4 k
Ω
TCLK
RCLK
RXD
CD
COL
LBK
LEDC/FDE
TXD
TXEN
TXC
RXC
RXD
CSN
COLL
LPBK
1 %
+3.3 V
VCC1
VCC2
CLKO
TMS380C24
1 : 2
T
o
10
BA
SE
-T
T
W
IS
T
E
D
-
P
A
IR
N
E
T
W
O
R
K
20 MHz
20 pF
*TEST0
1N914
10 K
Ω
4
Bias resistor RBIAS should be located close to the pin
and isolated from other signals.
1
2
3
4
Half/Full Duplex Selection controlled by TMS380C24 Pins
Test0 and OUTSEL0.
AUTOSEL
NTH
MD0
MD1
LI
JAB
PLR
Green Red
Red
PROGRAMMING
OPTIONS
LINE STATUS
LEDR
LEDT/PDN
LEDL
330
OUTSEL0
PAUI
330
1
4.7 K
Ω
TEST
DSQE
(907A)
*Open Collector
Driver
TPONA
TPONB
TPOPA
TPOPB
24.9
Ω 1%
24.9
Ω 1%
The TMS380C26 may be substituted for dual network
support of 10BASE-T and Token Ring.
Optional: Centertap capacitor may improve EMC
depending on board layout and system design.
2
0.1
μF
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