LU3X54FTL Datasheet, PDF (22/52 Pages) Agere Systems – QUAD-FET for 10Base-T/100Base-TX/FX

LU3X54FTL
QUAD-FET for 10Base-T/100Base-TX/FX
Data Sheet
July 2000
Pin Information (continued)
Table 5. MII Management Pins
Pin
Signal
Type
Description
113
MDC
I Management Data Clock. This is the timing reference for the transfer of
data on the MDIO signal. This signal may be asynchronous to RX_CLK and
TX_CLK. The maximum clock rate is 12.5 MHz.
When running MDC above 6.25 MHz, MDC must be synchronous with
LSCLK and have a setup time of 15 ns and a hold time of 5 ns with respect
to LSCLK. When using an external crystal instead of an LSCLK input, the
maximum MDC rate is 6.25 MHz.
112
MDIO
53 MASK_STAT_INT
I/O Management Data Input/Output. This I/O is used to transfer control and
status information between the LU3X54FTL and the station management.
Control information is driven by the station management synchronous with
MDC. Status information is driven by the LU3X54FTL synchronous with
MDC. This pin requires an external 1.5 kΩ pull-up resistor.
O Maskable Status Interrupt. This pin will go high whenever there is a
change in status as defined in Table 22.
Table 6. 10/100 Mbits/s Twisted-Pair (TP) Interface Pins
Pin
Signal
Type
Description
5
TPIN+/
9
FOIN+[D:A]
16
20
I Received Data. Positive differential received 125 Mbaud MLT3, or 10 Mbaud
Manchester data from magnetics.
Fiber-Optic Data Input. Positive differential received 125 Mbaud pseudo-
ECL data from fiber transceiver.
6
TPIN–/
10
FOIN–[D:A]
17
21
I Received Data. Negative differential received 125 Mbaud MLT3 or 10 Mbaud
Manchester data from magnetics.
Fiber-Optic Data Input. Negative differential received 125 Mbaud pseudo-
ECL data from fiber transceiver.
32
TPOUT+/
O Transmit Data. Positive differential transmit 125 Mbaud MLT3 or 10 Mbaud
36
FOOUT+[D:A]
Manchester data to magnetics.
46
Fiber-Optic Data Output. Positive differential transmit 125 Mbaud pseudo-
50
ECL compatible data to fiber transceiver.
33
TPOUT–/
O Transmit Data. Negative differential transmit 125 Mbaud MLT3 or 10 Mbaud
37
FOOUT–[D:A]
Manchester data to magnetics.
47
Fiber-Optic Data Output. Negative differential transmit 125 Mbaud pseudo-
51
ECL compatible data to fiber transceiver.
3
FOSD[D:A]
2
85
84
I Fiber-Optic Signal Detect. Pseudo-ECL input signal which indicates
whether or not the fiber-optic receive pairs (FOIN±) are receiving valid signal
levels. These inputs are ignored when not in fiber mode, and should be
grounded.
22
Lucent Technologies Inc.