AX88796 datasheet(13/71 Pages) ASIX

13 / 71 page

ASIX ELECTRONICS CORPORATION

AX88796 L

3-in-1 Local Bus Fast Ethernet Controller

2.2 10/100Mbps Twisted-Pair Interface pins group

SIGNAL

TYPE

PIN NO.

DESCRIPTION

TPI+

Received Data. Positive differential received 125M baud MLT3 or

10M baud Manchester data from magnetic.

TPI-

Received Data. Negative differential received 125M baud MLT3 or

10M baud Manchester data from magnetic.

TPO+

Transmit Data. Positive differential transmit 125M baud MLT3 or

10M baud Manchester data to magnetic.

TPO-

Transmit Data. Negative differential transmit 125M baud MLT3 or

10M baud Manchester data to magnetic.

REXT10

Current Setting 10Mbits/s. An external resistor 20k ohm is placed

from this signal to ground to set the 10Mbits/s TP driver transmit

output level.

REXT100

Current Setting 100Mbits/s. An external resistor 2.49k ohm is placed

from this signal to ground to set the 100Mbits/s TP driver transmit

output level.

REXTBS

External Bias Resistor. Band Gap Reference for the Receive Channel.

Connect this signal to a 24.9k ohm +/- 1 percent resistor to ground.

The parasitic load capacitance should be less than 15 pF.

Tab - 2 10/100Mbps Twisted-Pair Interfaces pins group

2.3 Built-in PHY LED indicator pins group

SIGNAL

TYPE

PIN NO.

DESCRIPTION

I_ACT

I_FULL/COL

Active Status : When I_OP is logic 1. If there is activity, transmit or

receive, on the line occurred, the output will be driven low for 0.67 sec

and then driven high at least 0.67 sec.

Full-Duplex/Collision Status. When I_OP is logic 0. If this signal is

low, it indicates full-duplex link established, and if it is high, then the

link is in half-duplex mode. When in half-duplex and collision

occurrence, the output will be driven low for 0.67 sec and driven high

at least 0.67 sec. (Current sink capacity is 6mA)

I_SPEED

Speed Status : If this signal is low, it indicates 100Mbps, and if it is

high, then the speed is 10Mbps. (Current sink capacity is 6mA)

I_LINK

I_LK/ACT

Link Status : When I_OP is logic 1. If this signal is low, it indicates

link, and if it is high, then the link is fail.

Link Status/Active : When I_OP is logic 0. If this signal is low, it

indicates link, and if it is high, then the link is fail. When in link status

and line activity occurrence, the output will be driven low for 0.67 sec

and driven high at least 0.67 sec. (Current sink capacity is 6mA)

Tab - 3 Built-in PHY LED indicator pins group

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