SLXT970AQC.B11-831643 Cortina Systems Inc, SLXT970AQC.B11-831643 Datasheet - Page 23

• 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

Datasheet
Full-Duplex at 10 Mbps or 100 Mbps
Repeater Mode
100 Mbps, Half-Duplex
10 Mbps, Half-Duplex, 19.11 = 0
10 Mbps, Half-Duplex, 19.11 = 1
Table 10. Test Loopback Operation
Figure 6. Loopback Paths
Table 11. Carrier Sense, Loopback, and Collision Conditions
Speed & Duplex Condition
Test Loopback
A test loopback function is provided for diagnostic testing of the LXT970A Transceiver. During
test loopback the twisted-pair interface is disabled. Data transmitted by the MAC is internally
looped back by the LXT970A Transceiver and returned to the MAC.
Test loopback is available for 100 Mbps and 10 Mbps operation. Loopback paths for the two modes
of operation are shown in
Test loopback is enabled by setting bit 0.14 = 1 (loopback), bit 0.8 = 1 (full-duplex), and bit 0.12 =
0 (disable auto-negotiation). The desired mode of operation for test loopback is set using bits 0.13
and 19.2 as shown in
Collision
The LXT970A Transceiver asserts its collision signal, asynchronously to any clock, whenever the
line state is half-duplex and the transmitter and receiver are active at the same time.
summarizes the conditions for assertion of carrier sense, collision, and data loopback signals.
10 Mbps Test Loopback
100 Mbps Test Loopback
1. Also set bit 0.14 = 1, bit 0.8 = 1, and 0.12 = 0 to enable Test
Loopback.
MII
Mode of Operation
Loopback
10 Mbps
Table
Digital
Block
Transmit or Receive
Transmit or Receive
Figure
10.
Loopback
100 Mbps
Carrier Sense
Receive only
Receive only
6.
Intel
Analog
Block
®
19.2
LXT970A Dual-Speed Fast Ethernet Transceiver
0
1
Bit
Driver
Driver
FX
TX
0.13
0
1
Operational
Loopback
None
None
None
Yes
Transmit and Receive
Transmit and Receive
Transmit and Receive
Collision
None
Table 11
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