SLXT970AQC.B11-831643 Cortina Systems Inc, SLXT970AQC.B11-831643 Datasheet - Page 32

• Manufacturer Part Number: SLXT970AQC.B11-831643
• Manufacturer: Cortina Systems Inc

Specifications of SLXT970AQC.B11-831643

• Number Of Receivers: 1
• Data Rate: 10/100Mbps
• Operating Supply Voltage (typ): 5V
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (max): 5.25V
• Operating Supply Voltage (min): 4.75V
• Mounting: Surface Mount
• Pin Count: 64
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Lead Free Status / RoHS Status: Not Compliant

Intel
2.5.2
2.6
2.6.1
32
During Power-up
During Auto-Negotiation or
Link Failure
Link-up; 100 Mbps; full-duplex
Link-up; 100 Mbps; half-duplex
Link-up; 10 Mbps; full-duplex
Link-up; 10 Mbps; half-duplex
Table 16. Status using FDS/LED Pins
®
LXT970A Dual-Speed Fast Ethernet Transceiver
Refer to the Register Definition section on
Monitoring Status via Indicator Pins
The LEDS, LEDR, LEDT, LEDL, and LEDC pins are CMOS digital outputs that drive LEDs.
These pins along with the FDS/MDINT output, can also be used to externally monitor the status of
the LXT970A Transceiver. The following notes apply to the FDS/MDINT and LED pins:
Table 16
FDS pins.
Intel® LXT970A Transceiver State
100BASE-X Operation
100BASE-X MII Operations
The MAC exchanges data with the LXT970A Transceiver over the MII interface. The
LXT970A Transceiver converts the digital data from the MAC into an analog waveform that is
transmitted to the network via the copper (TX) or fiber (FX) interface. The LXT970A Transceiver
converts analog signals received from the network into a digital format and sends them to the MAC
via the MII. Refer to the MII interface discussion on
signals.
The 100BASE-X protocol specifies the use of a 5-bit symbol code on the network media. However,
data is normally transmitted across the MII interface in 4-bit nibbles. The LXT970A incorporates a
4B/5B encoder/decoder circuit that translates 4-bit nibbles from the MII into 5-bit symbols for the
100BASE-X connection, and translates 5-bit symbols from the 100BASE-X connection into 4-bit
nibbles for the MII.
shows 4B/5B symbol coding (not all symbols are valid).
•
•
•
LEDR, LEDT and LEDC pulse Low to indicate receive, transmit, and collision activity
respectively. When the LXT970A Transceiver asserts these signals, it automatically extends
them for 100 ms.
LEDL indicates link status and LEDS indicates link speed. LEDL and LEDS are active Low.
In its default state (17.1 = 0), the MDINT/FDS output indicates duplex condition. FDS is
active High.
shows the state of the LXT970A Transceiver according to the status of LEDL, LEDS, and
Figure 14
shows the data conversion flow from nibbles to symbols.
page 63
for additional details on specific registers.
page 20
LEDL
High
High
Low
Low
Low
Low
for details on MII control and data
Pin Status
LEDS
High
High
High
High
Low
Low
Datasheet
High
High
FDS
Low
Low
Low
Low
Table 17