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LED Collision RU Full Duplex Enableï
LEDC is an open drain driver for the collision indicator pulls Low during
collision. LED “on” (i.e., Low output) time is extended by approximately
100 ms.
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åìë/('52LED Receiveï Open drain driver for the receive indicator LED. LED
“on” (i.e., Low output) time is extended by approximately 100 ms. Output
is pulled Low during receive. Pulled High internally.
ä ìê /('/ 2 LED Linkï Open drain driver for link integrity indicator. Output is pulled
Low during link test pass. Pulled High internally.
ìí ìé &' 2 Carrier Detectï An output for notifying the controller that activity exists
on the network.
ìé ìç 5&/. 2 Receive Clockï A recovered 10 MHz clock which is synchronous to the
received data and connected to the controller receive clock input.
ìè ìæ 5;' 2 Receive Dataï Output signal connected directly to the receive data input
of the controller.
ìç ìå /, , Link Enableï Controls link integrity test; enabled when LI is Hig h, dis-
abled when LI is Low.
ìæ ìä 5%,$6 , Bias Circuitryï A 7.5 kΩ 1% resistor to ground at this pin con trol s operat-
ing circuit bias.
ìå ëí '64( , SQE Disableï When DSQE is High, the SQE function is dis a bled.
When DSQE is Low, the SQE function is enabled. SQE should be disabled for normal operation in Hub/Switch/Repeater applications. Pulled
Low internally.
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T wisted PairOutputsï Differential outputs to the twisted-pair cable. The
outputs are pre-equalized.
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Mode Select 0 DQG ìï Mode select pins determine contro ller compatibility
mode in accordance with Tab le 2. Pulled Low internally.
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T wisted-P air ,QSXWVï A differential input pair from the twisted-pair cable.
Receive filter is integrated on-chip. No external filters are required.
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