SLXT973QC Cortina Systems Inc, SLXT973QC Datasheet - Page 41

• Manufacturer Part Number: SLXT973QC
• Manufacturer: Cortina Systems Inc

Specifications of SLXT973QC

• Lead Free Status / Rohs Status: Not Compliant

LXT973 Transceiver
Datasheet
249426, Revision 6.0
13 July 2007
3.10
3.10.1
3.10.2
Table 10
Figure 11
Cortina Systems
Monitoring Operations
Monitoring Auto-Negotiation
Auto-negotiation may be monitored as follows:
Per-Port LED Driver Functions
The LXT973 Transceiver incorporates three direct drive LEDs per port (LEDn_1, LEDn_2,
and LEDn_3). On power-up, all the LEDs light up for approximately one second after reset
de-asserts. Each LED may be configured to one of several different display modes using
the LED Configuration Pins, as shown in
The LED driver pins are open drain circuits (10 mA maximum current rating). If an LEDx_n
pin is unused, terminate with a 10KΩ pull-up resistor.
implementation. When configured for modes 2 or 4, the LEDs blink at the rate of 100 ms
to display multiple status.
Table 10
LED Configurations
Typical LED Implementation
®
0
0
• Link Status Register bit 1.2 = 1 once the link is established.
• Additional bits in Register 1 can be used to determine the link operating conditions
LXT973 10/100 Mbps Dual-Port Fast Ethernet PHY Transceiver
LED_CFG0
and status (refer to
1
1
provides LED configurations for the LXT973 Transceiver.
0
1
LED_CFG1
0
1
Table 17 on page
LEDx_n
pin
LEDn_1
Speed
Speed
Speed
Link
Table 10 on page
220 Ω
67).
Link/MII Isolate
Link/Activity
LEDn_2
Receive
Link
Figure 11
VLED
41.
Duplex/Collision
Duplex/Collision
shows a typical LED
3.10 Monitoring Operations
Transmit
LEDn_3
Duplex
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