參數(shù)資料
型號(hào)： LU3X31FT
廠商： Lineage Power
英文描述： Single-Port 3 V 10/100 Ethernet Transceiver TX/FX(單端口 3 V 10M位和100M位以太網(wǎng)收發(fā)器)
中文描述： 單端口3伏10/100以太網(wǎng)收發(fā)器德克薩斯州/外匯（單端口3伏1000萬(wàn)位和100米位以太網(wǎng)收發(fā)器）
文件頁(yè)數(shù)： 9/50頁(yè)
文件大小： 633K
代理商： LU3X31FT
Lucent Technologies Inc.
9
Preliminary Data Sheet
July 2000
LU3X31FT Single-Port 3 V
10/100 Ethernet Transceiver TX/FX
Note: Smaller font indicates that the pin has multiple functions.
Table 9. LED and Status Outputs
Note: Smaller font indicates that the pin has multiple functions.
1
SRL10/
FOSD+
I
Serial Mode Select.
At powerup or reset, if FOSEL pin is pulled low and
SRL10 is pulled high, then the MII interface will be operated in serial mode for
10 Mbits/s operation. Fiber-optic mode and 10 Mbits/s serial mode cannot be
set at the same time. See Table 2 for FOSD+ description.
10 Mbits/s Repeater Clock.
For 10 Mbits/s repeater mode, an external
10 MHz clock should be connected to this pin for clocking of the transmit data.
See Table 2 for FOSD– description.
Far-End Fault Indicator Enable
. At powerup or reset, if FOSEL pin is set
high, logic level of this pin is latched into bit 11 of register 18h. This pin has an
internal 40 k
pull-up resistor. See Table 7 for 10HDEN and Table 9 for
LEDFD description.
2
RPTR10CLK/
FOSD–
I/O
53
FEFI_EN/
10HDEN/
LEDFD
I/O
Pin
No.
50
Pin Name
I/O
Pin Description
LEDRX/
NDRPTR
I/O
Receive LED.
This output will drive a 10 mA LED if the LU3X31FT is receiv-
ing data from the UTP cable. Place a 10 k
resistor across the LED pins if
setting to nondefault mode, i.e., repeater mode, as shown in Figure 5. See
Table 8 for NDRPTR description.
Transmit LED or Activity LED.
When bit 7 of register 17h is 0, this output will
drive a 10 mA LED if the LU3X31FT is transmitting data. If the control bit is
set, then the LED will be driven whenever receive or transmit activity is
present. Place a 10 k
resistor across the LED pins if setting to nondefault
mode, i.e., bypass scrambler mode, as shown in Figure 5. See Table 6 for
BPSCR description.
Link LED.
This output will drive a 10 mA LED for as long as a valid link exists
across the cable. Place a 10 k
resistor across the LED pins if setting to non-
default mode, i.e., bypass align mode, as shown in Figure 5. See Table 6 for
BPALIGN description.
Collision LED.
This output will drive a 10 mA LED whenever the LU3X31FT
senses a collision has occurred. Place a 10 k
resistor across the LED pins if
setting to nondefault mode, i.e., bypass 4B/5B mode, as shown in Figure 5.
See Table 6 for BP4B5B description.
Full-Duplex Status.
This output will drive a 10 mA LED when the LU3X31FT
is in full-duplex mode. Place a 10 k
resistor across the LED pins if setting to
nondefault mode, i.e., 10HD disable mode, as shown in Figure 5. See Table 7
for 10HDEN and Table 8 for FEFI_EN description.
Speed Status.
This output will drive a 10 mA LED when the LU3X31FT is in
100 Mbits/s mode. Place a 10 k
resistor across the LED pins if setting to
nondefault mode, i.e., 10FD disable mode, as shown in Figure 5. See Table 7
for 10FDEN description.
51
LEDTX/ACTLED/
BPSCR
I/O
54
LNKLED/
BPALIGN
I/O
52
LEDCOL/
BP4B5B
I/O
53
LEDFD/
10HDEN/
FEFI_EN
I/O
22
LEDSP/
10FDEN
I/O
Pin
No.
Pin Name
I/O
Pin Description
Pin Information
(continued)
Table 8. Special Mode Configuartions
(continued)
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